Magnitude chart earthquake - Abridged from The Severity of an Earthquake, USGS General Interest Publication 1989-288-913. History and Details of MMI. The following is an excerpt from Intensity Distribution and Isoseismal Maps for the Northridge, California, Earthquake of January 17,1994.

 
Published Feb. 16, 2023 Updated March 2, 2023. This graph, published by The New York Times, includes an estimated death toll from the 7.8-magnitude earthquake and 7.5-magnitude aftershock that .... Best night restaurants near me

Although there is only one magnitude for a specific earthquake, there may be many values of intensity (damage) for that earthquake at different sites. A magnitude 6.0 quake releases approximately as much energy as 6,270 tons of TNT, a magnitude 7.0 199,000 tons, a magnitude 8.0 6.27 million tons and a magnitude 9.0 99 million tons.And looking at the history of recent and ancient earthquakes, the location of these is no surprise. Using data from the United States Geological Survey ( USGS ), creator PythonMaps mapped earthquake epicenters between 1956 and 2022 that registered a 4.5 or higher on the Richter scale.7 feb 2023 ... Thousands of people have been killed in Turkey and northern Syria after a 7.8 magnitude earthquake struck on Monday.Oct 15, 2023 · Richter scale, widely used quantitative measure of an earthquake’s magnitude (size), devised in 1935 by American seismologists Charles F. Richter and Beno Gutenberg. Magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph. The Latest Earthquakes application supports most recent browsers, view supported browsers. If ... All lists include most worldwide events magnitude 4.5 and greater, read more. REFRESH EARTHQUAKES Auto Update . 2023-10-19 20:15:58 (UTC-07:00) 1 Day, Magnitude 2.5+ U.S.USGS Magnitude 2.5+ Earthquakes, Past Day 37 earthquakes. Only List Earthquakes Shown on Map . Magnitude. Format. Newest First. Sort. 3.2. 11 km NE of Pāhala, Hawaii.Find 23 millimeters on the right side of the chart and mark that point. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake.Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:10 times less (2 millimetres) corresponds to a magnitude of 1;100 times less (0.2 millimetres) corresponds to ...Aug 25, 2023 · Number of earthquakes worldwide 2000-2021. Published by Statista Research Department , Aug 25, 2023. In 2021, a total of 2,206 earthquakes with magnitude of five or more were recorded worldwide ... In his email, Matelski noted the recent 7.3-magnitude earthquake that hit Japan's Fukushima area Feb. 13, resulting in a magnitude 4.0 earthquake in the Camp Zama area. Scientists consider it an aftershock of the 2011 earthquake, he said. Freeman said now is a good time to remind people to prepare for earthquakes and other natural disasters.... magnitude because intensity refers to the effects ... i.e. a magnitude 5 earthquake is ten times as intense as a magnitude 4 earthquake. Comparison chart ...This week’s magnitude 7.1 earthquake in Mexico was so destructive in the capital because it was relatively close to Mexico City — just 80 miles away. The Sept. 7, 2017 magnitude 8.1 earthquake ...In 2021, more than 12.6 thousand earthquake events occurred in the Philippines. A large share of these events had a magnitude range of about 2.0 to 2.9. In contrast, there were two events with the ...6.1 magnitude earthquake jolts Nepal's capital Kathmandu, leaves 20 houses damaged IND vs NZ: New Zealand create World Cup history with Rachin Ravindra, Daryl Mitchell's record-breaking partnership World Cup 2023Reference Tables to fill in the chart. 1. A seismic station located 60 km from the epicenter of an earthquake, recorded the maximum height of the S-waves to be 50 mm. What was the Richter magnitude of this earthquake? 2. An earthquake with a Richter magnitude of 6.0 caused an S-wave of 20 mm to be recorded on a seismograph.A massive magnitude 7.2 earthquake hit Haiti early Saturday morning, leaving buildings crumbled, hospitals overcrowded and people rushing in fear from their homes into the streets. The quake left ...An earthquake frequently defines how often a given earthquake with a certain magnitude comes about. On average, an earthquake with a magnitude of 2 or less comes about several hundred times a day throughout the world. However, a major earthquake range with a magnitude of 7.0 - 7.9 occurs more than once per month throughout the world. The dashed lines represent the reference curve for the decrease in peak-motion amplitude with increasing distance from the earthquake. A magnitude 3.0 earthquake is defined as the size event that generates a maximum ground motion of 1 millimeter (mm) at 100 km distance. To complete the construction of the magnitude scale, Richter had to ...1 Day, Magnitude 2.5+ U.S. 5 of 38 earthquakes in map area. Click for more information. 3.4.The M w 7.8 earthquake is the largest in Turkey since the 1939 Erzincan earthquake of the same magnitude, [4] and jointly the second-largest in the country, after larger estimates …Detailed Description. Graph showing the average annual occurrence and equivalent energy release for earthquakes of different magnitudes. Plot is from the Incorporated Research Institutions for Seismology.Largest earthquakes by magnitude A pie chart comparing the seismic moment release of the three largest earthquakes for the hundred-year period from 1906 to 2005 with that for all earthquakes of magnitudes <6, 6 to 7, 7 to 8 and >8 for the same period. The 2011 Japan quake would be roughly similar to Sumatra. Earthquakes of magnitude 8.0 and ...6.1 magnitude earthquake jolts Nepal's capital Kathmandu, leaves 20 houses damaged; IND vs NZ: New Zealand create World Cup history with Rachin Ravindra, Daryl Mitchell's record-breaking partnership; World Cup 2023; Webstory. 8 Bollywood celebs and their lookalikes; 7 paneer dishes for weight loss diet;A magnitude 7.3 Mw earthquake on October 11, 1918, in the Mona Passage, west of Puerto Rico, was caused by displacement along four segments of a normal fault, oriented N-S in the Mona Canyon. The earthquake generated a tsunami with runup heights reaching 6 meters, causing extensive damage along the western and northern coasts of Puerto Rico.Today's Biggest Earthquakes All recent earthquakes ». Earthquakes over 3.0 M within the last 24 hours. 3 hours ago 4.5 magnitude, 10 km depth. Mariana Islands. 7 hours ago 4.3 magnitude, 39 km depth. Vinchina , La Rioja , Argentina. 7 hours ago 5.0 magnitude, 184 km depth. San Antonio de los Cobres , Salta , Argentina.The total number of quakes above magnitude 2 that occurred during the 3 days in or near Costa Rica was 30, 7% less than normally.This is compared to the average number (Ø) of 32.2 quakes obtained from the 100 preceding 3 days intervals with a standard mean deviation (σ) of 11.8 (which is a measure of the typical amount of variation, or …Earthquake research has assisted engineers in determining better construction and design of retrofitting of homes and buildings that can withstand the shaking that earthquakes generate. Earthquake information, such as location, magnitude, and shaking distribution, is immediately available within minutes after an earthquake to everyone via ...Californians got an earthquake test alert at 3am. Many aren't happy. UC Berkeley scientists hold up phones running their MyShake app in 2016. Many Californians awoke at the ungodly hour of 3:19 a ...According to research by the Guardian and the US Geological Survey, the 1960 Valdivia earthquake is the most powerful ever recorded with a magnitude of about 9.5. More recent events including the ...27 oct 2022 ... Richter earthquake magnitude scale. Vector illustration. yan4ik ... Chart · Technology · Tsunami · Curve · Waves · Equalizer · Cracked · Noise ...Magnitude is the size of the earthquake. An earthquake has a single magnitude. The shaking that it causes has many values that vary from place to place based on distance, type of surface material, and other factors. See the Intensity section below for more details on shaking intensity measurements.Seismic Monitor - Recent earthquakes on a world map and much more. Latitude: 90 N. Longitude: 203 W. Help Earthquake headlines Last 30 Days Earthquakes Special Quakes Plate Tectonics Education Links IEB. Up-to-date map of the latest earthquakes with resources like news, lists, tools and a 3D viewer.The “Richter magnitude” is commonly reported by the news media when a damaging earthquake occurs anywhere in the world. The equation Richter used for earthquake magnitude was: M = log10A +2.56log10D - 1.67 where A is the peak amplitude in micrometers of the earthquake and D is the distance in Virat Kohli smashed 95 runs to go top in the scoring chart today. He surpassed his teammate and India captain Rohit Sharma in the list with the latter scoring 46 runs against New Zealand. Kohli ...Feb 14, 2023 · In 2021, more than 12.6 thousand earthquake events occurred in the Philippines. A large share of these events had a magnitude range of about 2.0 to 2.9. In contrast, there were two events with the ... USGS Magnitude 2.5+ Earthquakes, Past Day 38 earthquakes. Only List Earthquakes Shown on Map . Magnitude. Format. Newest First. Sort. 4.5. 33 km NNE of Güiria ... Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:10 times less (2 millimetres) corresponds to a magnitude of 1;100 times less (0.2 millimetres) corresponds to ...All earthquakes can now be compared on the same scale with the Moment Magnitude. Previously, the Richter scale was used, however, it is precise only for measuring earthquakes of a certain size and at a certain distance from a seismometer. See the Moment Magnitude chart below.What makes an earthquake "significant"? Events in this list and shown in red on our real-time earthquake map and list are considered “significant events’, and they are determined by a combination of magnitude, number of Did You Feel It responses, and PAGER alert level. Here is the equation: mag_significance = magnitude * 100 * (magnitude ...Fig. 11 Coda magnitude calculated from a log- r regres­ sion versus local magnitude for combined swarm data. Fig.l0 Coda magnitude calculated from a log r regres­ sion versus local magnitude for combined swarm data. The line joins equal magnitude values; the size ofsym­ bols indicates the estimated uncertainty. 4.5 4.5 4.0 4.0--+-3.5 3.5 ...Earthquake center of italy with magnitude 6.5 scale of richter scale. Its destructive force. Seismogram of different seismic activity record vector illustration, earthquake wave on paper fixing, stereo audio wave diagram background. The East is Not Immune to Earthquakes >400 Earthquakes of magnitude 3.5 or greater in eastern North America in the past 50 years. >800 Earthquakes of magnitude 3.5 or greater near Puerto Rico in the past 50 years. M5.3 Au Sable Forks, NY April 20, 2002; M4.7 Hollis Center, ME October 16, 2012; M5.8 Mineral, VA August 23, 2011; M5.1 Sparta, NC ...USGS infographic on the magnitude 5.8 earthquake that struck central Virginia August 23, 2011, east coast earthquake hazards and how the USGS is helping …Moment Magnitude Scale. Today, earthquake magnitude measurement is based on the Moment Magnitude Scale (MMS). MMS measures the movement of rock along the fault. It accurately measures larger earthquakes, which can last for minutes, affect a much larger area, and cause more damage. The Moment Magnitude can measure the local Richter magnitude (ML ...Earthquakes are among the most destructive natural phenomena on the planet. Their potential for damage and harm exceeds that of most other disasters. As with any type of emergency, advanced warning is the key to minimizing the danger to any...However, since the Energy Magnitude and Moment Magnitude measure two different properties of the earthquake, their values are not the same. The energy release can also be roughly estimated by converting the moment magnitude, M w , to energy using the equation log E = 5.24 + 1.44M w , where M w is the moment magnitude. There are some problems that have been encountered with the magnitude scales. For large earthquakes the Richter as well as body wave magnitude scales saturate. No matter how large the earthquake is, the magnitude computed from body waves tend not to get much above 6.0 to 6.5. The surface-wave scale is The Latest Earthquake web application displays information in real-time and near-real-time for magnitude 2.5+ earthquakes in the U.S. and magnitude 4.5+ earthquakes around the world. This interactive tool allows you to view a list and map of earthquakes and to fine-tune the display with various settings.Earthquake activity was lowest in June, while August was the most active and deadliest month. Major events also took place in Indonesia, Japan, China, Pakistan, Mexico and Peru. A M 7.3 quake in China was the most intense event of the year (MMI X, Extreme). A rare 5.9 magnitude earthquake struck Victoria, Australia in September.The March 11, 2011, M 9.1 Tohoku earthquake, which occurred near the northeast coast of Honshu, Japan, resulted from shallow thrust faulting on the subduction zone plate boundary between the Pacific and North America plates. At the location of this earthquake, the Pacific plate moves roughly westward relative to the North America plate at a ...Earthquake magnitude chart. Richter scale of natural disaster or cataclysm. Seismological activity infographic. Female character during dangerous vibrations. Flat vector illustration. Allahabad, Uttar Pradesh India- June 10 2023: Two story home building destroyed in the recent earthquake recorded on the Richter scale. Illegal construction ...On Friday, the Indonesian island of Sulawesi was hit by an earthquake of 7.5-magnitude, followed by a 20 foot tsunami. More than 1,200 deaths have been confirmed, and the city of Palu needs help. On Friday, the Indonesian island of Sulawesi...ISLETON, Cali. ( KTXL) — A 4.1 magnitude earthquake was detected near Isleton on Wednesday, according to the United States Geological Survey. Isleton is located about 40 miles southwest of ...Expert Answer. Transcribed image text: Refer to the UM STADIUM seismograph and the magnitude chart. What is the magnitude of the earthquake based on the amplitude and lag time observed in the UM STADIUM seismograph?September temperatures were literally off the charts. Antarctic sea ice extent is record low, and by a huge amount. Greenhouse gas concentrations, which are driving the change, remain at a record high. ... 6.3 magnitude earthquake kills 15, injures 40 in Afghanistan; Earthquake of magnitude 4.3 hits Andaman sea; Earthquake of magnitude 3.2 hits ...Observed at, Place name of epicenter, Magnitude, Maximum seismic intensity, Date and time of issuance. 2023/10/20 01:01, Southern Gunma Prefecture ...On Friday, the Indonesian island of Sulawesi was hit by an earthquake of 7.5-magnitude, followed by a 20 foot tsunami. More than 1,200 deaths have been confirmed, and the city of Palu needs help. On Friday, the Indonesian island of Sulawesi...Magnitudes are based on a logarithmic scale (base 10). What this means is that for each whole number you go up on the magnitude scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and ...By late Wednesday morning, the USGS community Did You Feel It? map received nearly 3,000 reports that the earthquake had been felt widely across the …Earthquake center of italy with magnitude 6.5 scale of richter scale. Its destructive force. Seismogram of different seismic activity record vector illustration, earthquake wave on paper fixing, stereo audio wave diagram background.Recent Significant Earthquake Reports. 2023-10-15: M=4.9 - 203 km W of Port Hardy, BC; 2023-10-10: M=4.5 - 190 km SSE of Yakutat, AK; Nov 7, 2019 · Information and Data Outside of USGS. Non-USGS sites that host various geophysical, geodetic, and geologic data pertinent to earthquake studies: U.S Regional and Cooperating Networks. SCECDC - Southern California Earthquake Data Center. NCEDC - Northern California Earthquake Data Center. 1 Day, Magnitude 2.5+ U.S. 5 of 38 earthquakes in map area. Click for more information. 3.4.ISLETON, Cali. ( KTXL) — A 4.1 magnitude earthquake was detected near Isleton on Wednesday, according to the United States Geological Survey. Isleton is located about 40 miles southwest of ...Earthquake research has assisted engineers in determining better construction and design of retrofitting of homes and buildings that can withstand the shaking that earthquakes generate. Earthquake information, such as location, magnitude, and shaking distribution, is immediately available within minutes after an earthquake to everyone via ...Richter scale, widely used quantitative measure of an earthquake’s magnitude (size), devised in 1935 by American seismologists Charles F. Richter and Beno Gutenberg. Magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph.However, since the Energy Magnitude and Moment Magnitude measure two different properties of the earthquake, their values are not the same. The energy release can also be roughly estimated by converting the moment magnitude, M w , to energy using the equation log E = 5.24 + 1.44M w , where M w is the moment magnitude. Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:10 times less (2 millimetres) corresponds to a magnitude of 1;100 times less (0.2 millimetres) corresponds to ... The Richter magnitude scale was created to rate the strength and magnitude of earthquakes. It is a base-10 logarithm scale of ground motion 100km from the epicenter. Each increase of 1 magnitude means 10 times greater ground motion. To measure the amount of energy that was released during an Earthquake, a base 32 logarithm scale is used.Largest earthquakes by magnitude A pie chart comparing the seismic moment release of the three largest earthquakes for the hundred-year period from 1906 to 2005 with that for all earthquakes of magnitudes <6, 6 to 7, 7 to 8 and >8 for the same period. The 2011 Japan quake would be roughly similar to Sumatra. Earthquakes of magnitude 8.0 and ...What is the lag time in seconds) of this graph? (Although unlabeled, the X axis is in seconds, Ignore the Y Axis) Question 13 1 pts Refer to the DEES seismograph and the magnitude chart. Using your lag time from 4.31, what is the magnitude of the earthquake if the amplitude is equal to 50mm? Question 14 1 pts Refer to the UM STADIUM seismograph.Find 23 millimeters on the right side of the chart and mark that point. Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. The point where your ruler crosses the middle line on the chart marks the magnitude (strength) of the earthquake.MISAWA AIR BASE, Japan -- U.S. Air Force Col. Jesse J. Friedel, the 35th Fighter Wing and Misawa Air Base installation commander, hosted a commemoration ceremony with Japan Air Self-Defense Force and local civic leaders to honor of the 10th anniversary of,The magnitude 9.2 Great Alaska Earthquake that struck south-central Alaska at 5:36 p.m. on Friday, March 27, 1964, is the largest recorded earthquake in U.S. history and the second-largest earthquake recorded with modern instruments.An estimate of the expected earthquake rate at all possible magnitudes is needed for seismic hazard forecasts. Regional earthquake magnitude frequency …The other variable is the height of the biggest wave (amplitude). A line can then be drawn between these measurements on a chart known as a nomogram. This has an S-P scale on one side and an amplitude scale on the other, and the intersection of a line joining the two values with the magnitude scale indicates the size of the earthquake.Oct 21, 2023 · PHIVOLCS Earthquake Intensity Scale (PEIS) Perceptible to people under favorable circumstances. Delicately balanced objects are disturbed slightly. Still Water in containers oscillates slowly. Felt by few individuals at rest indoors. Hanging objects swing slightly. Still Water in containers oscillates noticeably. Felt by many people indoors ... If the application does not load, try our legacy Latest Earthquakes application. Javascript must be enabled to view our earthquake maps. To access USGS earthquake information without using javascript, use our Magnitude 2.5+ Earthquakes, Past Day ATOM Feed or our other earthquake feeds .The dashed lines represent the reference curve for the decrease in peak-motion amplitude with increasing distance from the earthquake. A magnitude 3.0 earthquake is defined as the size event that generates a maximum ground motion of 1 millimeter (mm) at 100 km distance. To complete the construction of the magnitude scale, Richter had to ... The chart shows all the earthquakes that originated within 30 kilometers around the city of Antakya in southern Turkey before and after a magnitude 6.4 earthquake occurred on February 20.This may be through connections with known thermal structure, crustal properties as measured using geophysical techniques (magnetotellurics, compressive and shear wave speeds), seismological studies of earthquake occurrence or earthquake source properties, geodetic investigations of locking depth, laboratory experiments on natural or analog ...Earthquake center of italy with magnitude 6.5 scale of richter scale. Its destructive force. Seismogram of different seismic activity record vector illustration, earthquake wave on paper fixing, stereo audio wave diagram background.Earthquake Magnitude Scale; Magnitude Earthquake Effects Estimated Number Each Year; 2.5 or less: Usually not felt, but can be recorded by seismograph. Millions: 2.5 to 5.4: Often felt, but only causes minor damage. 500,000: 5.5 to 6.0: Slight damage to buildings and other structures. 350: 6.1 to 6.9: May cause a lot of damage in very populated ... 6.1 - 6.9. Can cause damage to poorly constructed buildings and other structures in areas up to about 100 kilometers across where people live. 7.0 - 7.9. "Major" earthquake. Can cause serious damage over larger areas. 8.0 - 8.9. "Great" earthquake. Can cause serious damage and loss of life in areas several hundred kilometers across.Number of earthquakes worldwide 2000-2021. Published by Statista Research Department , Aug 25, 2023. In 2021, a total of 2,206 earthquakes with magnitude of five or more were recorded worldwide ...

Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:10 times less (2 millimetres) corresponds to a magnitude of 1;100 times less (0.2 millimetres) corresponds to .... Reinstatement f 1

magnitude chart earthquake

UN peacekeepers take a break while working through the rubble of the UN mission in Haiti's headquarters in Port au Prince, in the aftermath of the devastating January 2010 earthquake. On 12 January 2010, a 7.0 magnitude earthquake struck Haiti, leaving its capital Port-au-Prince devastated. About 220,000 people were reportedly killed, among ...ISLETON, Cali. ( KTXL) — A 4.1 magnitude earthquake was detected near Isleton on Wednesday, according to the United States Geological Survey. Isleton is located about 40 miles southwest of ...Detailed Description. Earthquake magnitudes and energy release, and comparison with other natural and man-made events.Jul 1, 2021 · Earthquake Intensity - Modified Mercalli Intensity (MMI) Scale. The Modified Mercalli Intensity value assigned to a specific site after an earthquake has a more meaningful measure of severity to the nonscientist than the magnitude because intensity refers to the effects actually experienced at that place. The lower numbers of the intensity ... 6 may 2022 ... Moment magnitude is calculated from the area of the fault that is ruptured and the distance the ground moved along the fault. The Richter scale ...Approximately 1,500 earthquakes are recorded in Japan every year. The magnitude of each earthquake varies, and larger earthquakes between 4 and 7 on the Richter scale regularly occur.Fig. 11 Coda magnitude calculated from a log- r regres­ sion versus local magnitude for combined swarm data. Fig.l0 Coda magnitude calculated from a log r regres­ sion versus local magnitude for combined swarm data. The line joins equal magnitude values; the size ofsym­ bols indicates the estimated uncertainty. 4.5 4.5 4.0 4.0--+-3.5 3.5 ...All earthquakes can now be compared on the same scale with the Moment Magnitude. Previously, the Richter scale was used, however, it is precise only for measuring earthquakes of a certain size and at a certain distance from a seismometer. See the Moment Magnitude chart below.Abridged from The Severity of an Earthquake, USGS General Interest Publication 1989-288-913. History and Details of MMI. The following is an excerpt from Intensity Distribution and Isoseismal Maps for the Northridge, California, Earthquake of January 17,1994.3 min read 18 Oct 2023, 01:56 PM IST Join us. Nishant Kumar. Coal India share price hit its fresh 52-week high on Thursday. It hit its 52-week low of ₹207.70 on March 27 this year. In about ...What is the lag time in seconds) of this graph? (Although unlabeled, the X axis is in seconds, Ignore the Y Axis) Question 13 1 pts Refer to the DEES seismograph and the magnitude chart. Using your lag time from 4.31, what is the magnitude of the earthquake if the amplitude is equal to 50mm? Question 14 1 pts Refer to the UM STADIUM seismograph.Earthquake magnitude chart. Richter scale of natural disaster or cataclysm. Seismological activity infographic. Female character during dangerous vibrations. Flat vector illustration. Allahabad, Uttar Pradesh India- June 10 2023: Two story home building destroyed in the recent earthquake recorded on the Richter scale. Illegal construction ...Earth Sciences questions and answers. Refer to the HOME seismograph. What is the amplitude of this graph? Refer to the HOME seismograph. What is the lag time (difference between P and S wave arrival times, in seconds) of this graph? Refer to the HOME seismograph and the magnitude chart. What is the magnitude of the earthquake based on the ... A magnitude 7.3 Mw earthquake on October 11, 1918, in the Mona Passage, west of Puerto Rico, was caused by displacement along four segments of a normal fault, oriented N-S in the Mona Canyon. The earthquake generated a tsunami with runup heights reaching 6 meters, causing extensive damage along the western and northern coasts of Puerto Rico..

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