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Meet NEIC Interns!
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###
New Video Exploring Intern Experiences
[View now](https://www.usgs.gov/media/videos/meet-usgs-interns-earthquakes-edition)
Latest Earthquakes
------------------
###
past 24 hours, 7 days, 1 month
[View recent earthquakes worldwide](https://earthquake.usgs.gov/earthquakes/map/)
Significant Earthquakes Archive
-------------------------------
###
lists of annual impactful earthquakes
[View lists](https://earthquake.usgs.gov/earthquakes/browse/significant.php)
Search Earthquake Catalog
-------------------------
###
online search by time window, area, magnitude, and more
[Find an earthquake](https://earthquake.usgs.gov/earthquakes/search/)
Machine Learning Mapping in the Sierra Nevada Mountains
-------------------------------------------------------
###
A new study mapping the bedrock outcrops in California
[View Article](https://www.usgs.gov/publications/mapping-bedrock-outcrops-sierra-nevada-mountains-california-usa-using-machine-learning)
Meet NEIC Interns!
------------------
###
New Video Exploring Intern Experiences
[View now](https://www.usgs.gov/media/videos/meet-usgs-interns-earthquakes-edition)
Latest Earthquakes
------------------
###
past 24 hours, 7 days, 1 month
[View recent earthquakes worldwide](https://earthquake.usgs.gov/earthquakes/map/)
Significant Earthquakes Archive
-------------------------------
###
lists of annual impactful earthquakes
[View lists](https://earthquake.usgs.gov/earthquakes/browse/significant.php)
Search Earthquake Catalog
-------------------------
###
online search by time window, area, magnitude, and more
[Find an earthquake](https://earthquake.usgs.gov/earthquakes/search/)
Machine Learning Mapping in the Sierra Nevada Mountains
-------------------------------------------------------
###
A new study mapping the bedrock outcrops in California
[View Article](https://www.usgs.gov/publications/mapping-bedrock-outcrops-sierra-nevada-mountains-california-usa-using-machine-learning)
Meet NEIC Interns!
------------------
###
New Video Exploring Intern Experiences
[View now](https://www.usgs.gov/media/videos/meet-usgs-interns-earthquakes-edition)
* 1
* 2
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* 4
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#####
Significant Earthquakes, Past 30 days
[Significant Earthquakes Archive](https://earthquake.usgs.gov/earthquakes/browse/significant.php)
[What makes an earthquake "significant"?](https://earthquake.usgs.gov/earthquakes/browse/significant.php#sigdef)
#### 6.5
[
36 km NNE of Olonkinbyen, Svalbard and Jan Mayen
](https://earthquake.usgs.gov/earthquakes/eventpage/us6000pxvx)
2025-03-10 02:33:14 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
10.0 km
#### 4.1
[
10 km NW of Malibu, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci41075584)
2025-03-09 20:03:20 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
11.4 km
#### 4.5
[
2025 Orcas Island, Washington
](https://earthquake.usgs.gov/earthquakes/eventpage/uw62078906)
2025-03-03 13:02:38 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
15.8 km
#### 3.8
[
2 km ESE of North Hollywood, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci41070112)
2025-03-03 06:13:45 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
15.6 km
#### 4.8
[
26 km SW of Ackerly, Texas
](https://earthquake.usgs.gov/earthquakes/eventpage/tx2025edml)
2025-02-28 19:33:24 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
6.8 km
#### 5.5
[
14 km S of Kodāri̇̄, Nepal
](https://earthquake.usgs.gov/earthquakes/eventpage/us6000pvwf)
2025-02-27 21:06:10 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
#### 5.9
[
102 km NNE of Punta Cana, Dominican Republic
](https://earthquake.usgs.gov/earthquakes/eventpage/pr2025056002)
2025-02-25 05:48:55 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
46.0 km
#### 3.4
[
6 km SSE of Lea Hill, Washington
](https://earthquake.usgs.gov/earthquakes/eventpage/uw62076946)
2025-02-22 11:45:29 (UTC)
Pager Alert Level: Gray (Null)
MMI: III (Weak Shaking)
25.4 km
#### 4.8
[
27 km W of Squamish, Canada
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pfbs)
2025-02-21 21:26:33 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
#### 4.8
[
1 km NE of Charneca de Caparica, Portugal
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pe8k)
2025-02-17 13:24:05 (UTC)
Pager Alert Level: Gray (Null)
10.0 km
#### 4.2
[
10 km SSE of Nāngloi Jāt, India
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pe5z)
2025-02-17 00:06:52 (UTC)
Pager Alert Level: Gray (Null)
10.0 km
#### 3.7
[
10 km WNW of Malibu, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci40186202)
2025-02-15 07:44:05 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
15.4 km
#### 5.0
[
53 km NW of Toyah, Texas
](https://earthquake.usgs.gov/earthquakes/eventpage/tx2025deqh)
2025-02-15 05:23:21 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
6.1 km
#####
Significant Earthquakes, Past 30 days
[Significant Earthquakes Archive](https://earthquake.usgs.gov/earthquakes/browse/significant.php)
[What makes an earthquake "significant"?](https://earthquake.usgs.gov/earthquakes/browse/significant.php#sigdef)
#### 6.5
[
36 km NNE of Olonkinbyen, Svalbard and Jan Mayen
](https://earthquake.usgs.gov/earthquakes/eventpage/us6000pxvx)
2025-03-10 02:33:14 (UTC)
Pager Alert Level: Green
MMI: VIII (Severe Shaking)
10.0 km
#### 4.1
[
10 km NW of Malibu, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci41075584)
2025-03-09 20:03:20 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
11.4 km
#### 4.5
[
2025 Orcas Island, Washington
](https://earthquake.usgs.gov/earthquakes/eventpage/uw62078906)
2025-03-03 13:02:38 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
15.8 km
#### 3.8
[
2 km ESE of North Hollywood, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci41070112)
2025-03-03 06:13:45 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
15.6 km
#### 4.8
[
26 km SW of Ackerly, Texas
](https://earthquake.usgs.gov/earthquakes/eventpage/tx2025edml)
2025-02-28 19:33:24 (UTC)
Pager Alert Level: Green
MMI: V (Moderate Shaking)
6.8 km
#### 5.5
[
14 km S of Kodāri̇̄, Nepal
](https://earthquake.usgs.gov/earthquakes/eventpage/us6000pvwf)
2025-02-27 21:06:10 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
#### 5.9
[
102 km NNE of Punta Cana, Dominican Republic
](https://earthquake.usgs.gov/earthquakes/eventpage/pr2025056002)
2025-02-25 05:48:55 (UTC)
Pager Alert Level: Green
MMI: IV (Light Shaking)
46.0 km
#### 3.4
[
6 km SSE of Lea Hill, Washington
](https://earthquake.usgs.gov/earthquakes/eventpage/uw62076946)
2025-02-22 11:45:29 (UTC)
Pager Alert Level: Gray (Null)
MMI: III (Weak Shaking)
25.4 km
#### 4.8
[
27 km W of Squamish, Canada
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pfbs)
2025-02-21 21:26:33 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
10.0 km
#### 4.8
[
1 km NE of Charneca de Caparica, Portugal
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pe8k)
2025-02-17 13:24:05 (UTC)
Pager Alert Level: Gray (Null)
10.0 km
#### 4.2
[
10 km SSE of Nāngloi Jāt, India
](https://earthquake.usgs.gov/earthquakes/eventpage/us7000pe5z)
2025-02-17 00:06:52 (UTC)
Pager Alert Level: Gray (Null)
10.0 km
#### 3.7
[
10 km WNW of Malibu, CA
](https://earthquake.usgs.gov/earthquakes/eventpage/ci40186202)
2025-02-15 07:44:05 (UTC)
Pager Alert Level: Gray (Null)
MMI: IV (Light Shaking)
15.4 km
#### 5.0
[
53 km NW of Toyah, Texas
](https://earthquake.usgs.gov/earthquakes/eventpage/tx2025deqh)
2025-02-15 05:23:21 (UTC)
Pager Alert Level: Green
MMI: VI (Strong Shaking)
6.1 km
Earthquake Hazards Program
* [Home](/programs/earthquake-hazards)
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Earthquake Hazards Program
==========================
_**As of 3/13, 2pm ET: The ShakeAlert System is currently offline for emergency maintenance. All other earthquake monitoring by the USGS and its partners is active and uninterrupted. Remember to Drop, Cover, and Hold On if you feel shaking or get an alert.**_
[Search Earthquake Catalog](https://earthquake.usgs.gov/earthquakes/search/)
###
Latest Earthquakes
[
](https://earthquake.usgs.gov/earthquakes/map/)
Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System).
[View Earthquakes](https://earthquake.usgs.gov/earthquakes/map/)
###
Search Earthquake Catalog
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Find an earthquake or a list of earthquakes by time window, magnitude, area, and more, and choose the output format - map and list, CVS, and others.
[Search catalog](https://earthquake.usgs.gov/earthquakes/search/)
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* [Earthquake FAQ's](/natural-hazards/earthquake-hazards/faqs-category)
* [Earthquake Notifications](https://earthquake.usgs.gov/ens/)
* [Realtime Earthquake Products](https://www.usgs.gov/programs/earthquake-hazards/products)
* [ShakeAlert Early Warning](/programs/earthquake-hazards/science/early-warning)
* [The Science of Earthquakes](/natural-hazards/earthquake-hazards/science/science-earthquakes)
* [Earthquake Topics - learn more](https://earthquake.usgs.gov/education/)
* [Science for Everyone - plain language research summaries](/programs/earthquake-hazards/science-everyone)
[Did You Feel It?](https://earthquake.usgs.gov/data/dyfi/)
[The Night the Earth Shook](/news/featured-story/night-earth-shook)
December 19, 2024
#### The Night the Earth Shook
[(Some) Assembly Required: How to sign your organization up for the Great ShakeOut](/news/featured-story/some-assembly-required-how-sign-your-organization-great-shakeout)
October 15, 2024
#### (Some) Assembly Required: How to sign your organization up for the Great ShakeOut
[USGS seeking Loma Prieta felt reports from 35-year-old earthquake](/news/state-news-release/usgs-seeking-loma-prieta-felt-reports-35-year-old-earthquake)
October 8, 2024
#### USGS seeking Loma Prieta felt reports from 35-year-old earthquake
[View All](/programs/earthquake-hazards/news)
February 27, 2025
#### [Phase 1 technical implementation plan for the expansion of the ShakeAlert earthquake early warning system to Alaska](/publications/phase-1-technical-implementation-plan-expansion-shakealert-earthquake-early-warning)
Executive SummaryThe conference report accompanying the fiscal year (FY) 2022 Consolidated Appropriations Act (Public Law 117–103) for the U.S. Department of the Interior and related agencies directed the U.S. Geological Survey (USGS) to “work with the State of Alaska to develop an implementation plan to be completed within two years in order to put ShakeAlert/Earthquake Early Warning in...
Authors
Cecily J. Wolfe, Natalia A. Ruppert, Douglas D. Given, Michael E. West, Valerie I. Thomas, Jessica R. Murray, Ronni Grapenthin
By
[Natural Hazards Mission Area](/mission-areas/natural-hazards), [Earthquake Hazards Program](/programs/earthquake-hazards)
February 27, 2025
#### [Migration of seismicity from the mantle to the upper crust beneath Harrat Lunayyir volcanic field, Saudi Arabia](/publications/migration-seismicity-mantle-upper-crust-beneath-harrat-lunayyir-volcanic-field-saudi)
Harrat Lunayyir is a volcanic field in Saudi Arabia that experienced a Mw~5.4 earthquake driven by an upper-crustal dike intrusion in May 2009. This volcanic field has exhibited numerous forms of volcanic seismicity both prior to and since the 2009 dike intrusion. Significantly, earthquakes within the lithospheric mantle and, rarely, the lower crust are present in the two-decade long...
Authors
Alexander R. Blanchette, Simon L. Klemperer, Walter D. Mooney, Turki A. Sehli
By
[Natural Hazards Mission Area](/mission-areas/natural-hazards), [Earthquake Hazards Program](/programs/earthquake-hazards), [Earthquake Science Center](/centers/earthquake-science-center)
February 19, 2025
#### [Implications of physics-based M9 ground motions on liquefaction-induced damage in the Cascadia Subduction Zone: Looking forward and backward](/publications/implications-physics-based-m9-ground-motions-liquefaction-induced-damage-cascadia)
Given the likelihood of future M9 Cascadia Subduction Zone (CSZ) earthquakes, various estimates of the resulting, regional ground motions have been made, including a suite of 30 physics-based simulations that reflect key modeling uncertainties. However, because the last CSZ interface rupture occurred in 1700 CE, the shaking expected in such an event is especially uncertain, as are the...
Authors
Ryan A. Rasanen, Alex R.R. Grant, Andrew James Makdisi, Brett W. Maurer, Erin Wirth
By
[Natural Hazards Mission Area](/mission-areas/natural-hazards), [Earthquake Hazards Program](/programs/earthquake-hazards), [Earthquake Science Center](/centers/earthquake-science-center)
[View All](/programs/earthquake-hazards/publications)
[link
](/programs/earthquake-hazards/science/public-kickoff-webinar-2026-national-seismic-hazard-models-guam)
January 23, 2025
#### [Public kickoff webinar: 2026 National Seismic Hazard Models for Guam & Northern Mariana Islands and American Samoa](/programs/earthquake-hazards/science/public-kickoff-webinar-2026-national-seismic-hazard-models-guam)
Monday, February 24, 2025 2:00-4:00 pm MST A Virtual Meeting
By
[Earthquake Hazards Program](/programs/earthquake-hazards)
[link](/programs/earthquake-hazards/science/public-kickoff-webinar-2026-national-seismic-hazard-models-guam)
January 23, 2025
#### Public kickoff webinar: 2026 National Seismic Hazard Models for Guam & Northern Mariana Islands and American Samoa
Monday, February 24, 2025 2:00-4:00 pm MST A Virtual Meeting
[Learn More](/programs/earthquake-hazards/science/public-kickoff-webinar-2026-national-seismic-hazard-models-guam)
[link
](/programs/earthquake-hazards/science/m-69-october-17-1989-loma-prieta-earthquake)
October 8, 2024
#### [M 6.9 October 17, 1989 Loma Prieta Earthquake](/programs/earthquake-hazards/science/m-69-october-17-1989-loma-prieta-earthquake)
The 1989 Loma Prieta earthquake ended decades of tranquility in the San Francisco Bay region. It was a wakeup call to prepare for the potentially even more devastating shocks that are inevitable in the future. Since 1989, the work of the U.S. Geological Survey and other organizations has improved understanding of the seismic threat in the Bay region, promoted awareness of earthquake hazards, and...
By
[Natural Hazards Mission Area](/mission-areas/natural-hazards), [Earthquake Hazards Program](/programs/earthquake-hazards)
[link](/programs/earthquake-hazards/science/m-69-october-17-1989-loma-prieta-earthquake)
October 8, 2024
#### M 6.9 October 17, 1989 Loma Prieta Earthquake
The 1989 Loma Prieta earthquake ended decades of tranquility in the San Francisco Bay region. It was a wakeup call to prepare for the potentially even more devastating shocks that are inevitable in the future. Since 1989, the work of the U.S. Geological Survey and other organizations has improved understanding of the seismic threat in the Bay region, promoted awareness of earthquake hazards, and...
[Learn More](/programs/earthquake-hazards/science/m-69-october-17-1989-loma-prieta-earthquake)
[link
](/programs/earthquake-hazards/science/earthquake-response-and-investigations)
September 5, 2024
#### [Earthquake Response and Investigations](/programs/earthquake-hazards/science/earthquake-response-and-investigations)
Post-earthquake scientific and engineering investigations are undertaken by the USGS and its partners to capture critical information to understand the causes and impacts of the event, lessons from which can substantially improve the Nation’s resilience after future earthquakes.
By
[Natural Hazards Mission Area](/mission-areas/natural-hazards), [Earthquake Hazards Program](/programs/earthquake-hazards)
[link](/programs/earthquake-hazards/science/earthquake-response-and-investigations)
September 5, 2024
#### Earthquake Response and Investigations
Post-earthquake scientific and engineering investigations are undertaken by the USGS and its partners to capture critical information to understand the causes and impacts of the event, lessons from which can substantially improve the Nation’s resilience after future earthquakes.
[Learn More](/programs/earthquake-hazards/science/earthquake-response-and-investigations)
[View All](/programs/earthquake-hazards/science)
[ShakeMap icon](/media/images/shakemap-icon)
ShakeMap icon
[fig4.gif](/media/images/fig4gif)
fig4.gif
[Mendocino\_M4all.jpg](/media/images/mendocinom4alljpg)
Mendocino\_M4all.jpg
[Mendocino\_M41month.jpg](/media/images/mendocinom41monthjpg)
Mendocino\_M41month.jpg
[Mendocino\_map copy.jpg](/media/images/mendocinomap-copyjpg)
Mendocino\_map copy.jpg
[Mendocino\_parameters.jpg](/media/images/mendocinoparametersjpg)
Mendocino\_parameters.jpg
[Mendocino\_table.jpg](/media/images/mendocinotablejpg)
Mendocino\_table.jpg
[Mendocino\_table.jpg - Copy](/media/images/mendocinotablejpg-copy)
Mendocino\_table.jpg - Copy
[Aftershock Forecast on the earthquake event page](/media/images/aftershock-forecast-earthquake-event-page)
Aftershock Forecast on the earthquake event page
[View All](/programs/earthquake-hazards/multimedia)
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