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California Geological Survey @cageosurvey.bsky.social · 02/10/2026

NEW MAP! The Mineral Resources Program has completed new geologic mapping of the Daggett Ridge area in the Mojave Desert, California. www.conservation.ca.gov/cgs/publicat...

Geologic map of the Daggett Ridge area. Different rock units are shown in different colors. A legend is on the right and cross sections run along the bottom.

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California Geological Survey @cageosurvey.bsky.social · 29/09/2026

Between September 21 (12:00 AM PST) and September 27 (11:59 PM) there were 48 earthquakes in California of magnitude 2.0 or larger. 🔸44 earthquakes between magnitude 2.0 - 2.9 🔸4 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.7 near Boonville, CA.

Infographic with three sections. On the left is a map of California with the locations of the earthquakes shown by different sized red dots. On the right is a bar graph showing the number of earthquakes of each magnitude. At the bottom is the same description shown in the text above.

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California Geological Survey @cageosurvey.bsky.social · 22/09/2026

Between September 14 (12:00 AM PST) and September 20 (11:59 PM) there were 31 earthquakes in California of (M) magnitude 2.0 or larger. 🔸29 earthquakes between magnitude 2.0 - 2.9 🔸2 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.5 near Petrolia, CA.

Infographic showing a map of California with red dots of different sizes showing the location of earthquakes. On the right is a bar graph showing the number of earthquakes in each magnitude range.

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California Geological Survey @cageosurvey.bsky.social · 14/09/2026

Between September 7 (12:00 AM PST) and September 13 (11:59 PM) there were 63 earthquakes in California of magnitude (M) 2.0 or larger. 🔸57 earthquakes between magnitude 2.0 - 2.9 🔸6 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.8 near Petrolia, CA.

Infographic with the same text as in the post. On the left is a map of California showing the location of earthquakes indicated by different colored red dots. On the right is a bar graph showing the number of earthquakes of different magnitudes.

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California Geological Survey @cageosurvey.bsky.social · 09/09/2026

Happy California Admission Day! On September 9, 1850, California became the 31st state, just two years after a discovery that changed everything: gold. The rush that followed grew California's population from under 1,000 people to nearly 100,000 in less than two years. 🧪 ⚒️

Photograph of a large, irregularly shaped gold nugget against a white background, courtesy of the California State Capitol Museum. The nugget has a rough, lumpy surface with bright gold coloring on its upper facets and darker brown oxidized rock or matrix material clinging to its lower portion.

Front page of "The Californian" newspaper, published by B.R. Buckelew in San Francisco, dated March 15, 1848. A short item headlined "Gold Mine Found" reports that gold has been found in considerable quantities in the raceway of Captain Sutter's newly built sawmill on the American Fork, noting one person had already gathered thirty dollars' worth in a short time.

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California Geological Survey @cageosurvey.bsky.social · 09/09/2026

Between August 31 (12:00 AM PST) and September 6 (11:59 PM) there were 29 earthquakes in California of magnitude (M) 2.0 or larger. 🔸25 earthquakes between magnitude 2.0 - 2.9 🔸4 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.3 near Larkfield-Wikiup, CA.

Infographic showing the number of earthquakes in California. On the left-hand side is a map of California and the earthquakes are shown as red dots of different colors. On the right hand side is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 03/09/2026

CGS recently released Map Sheet 48, a statewide shaking-intensity map based on USGS's 2023 National Seismic Hazard Model. Here's what it shows. #earthquake 1/3

Map of California titled 'Earthquake Shaking Potential,' published by the California Geological Survey. The state is shaded using the Modified Mercalli Intensity scale, ranging from pale yellow (VI, Strong Shaking) through orange and red to dark maroon (XI, Devastating Shaking), showing the level of ground shaking expected from future earthquakes.
The darkest red and maroon areas run along the coastal mountain ranges and major fault zones, most intensely through the Los Angeles, San Bernardino, and Riverside corridor and across the San Francisco Bay Area. The Central Valley, including the Sacramento area, along with parts of the northern Sierra Nevada near Lake Tahoe, appear in lighter yellow and pale orange tones, indicating comparatively lower but still present shaking potential. A legend on the right explains the six intensity levels shown, and the map includes a Drop, Cover, and Hold On safety graphic in the lower left.

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California Geological Survey @cageosurvey.bsky.social · 01/09/2026

Between August 24 (12:00 AM PST) and August 30 (11:59 PM) there were 41 earthquakes in California of magnitude (M) 2.0 or larger. 🔸39 earthquakes between M2.0 - 2.9 🔸1 earthquake between M3.0 - 3.9 🔸1 earthquake between M4.0 - 4.9 The largest earthquake was a magnitude 4.8 near Petrolia, CA.

Infographic showing a map of California. Red dots show earthquake locations and the size of the dots indicates the relative magnitude. On the right is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 24/08/2026

Between August 17 (12:00 AM PST) and August 23 (11:59 PM) there were 49 earthquakes in California of magnitude 2.0 or larger. 🔸43 earthquakes between magnitude 2.0 - 2.9 🔸6 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.9 near Coso Junction, CA.

Infographic showing map of CA with earthquakes shown as red dots. Different sizes indicates different magnitudes. On the side is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 11/08/2026

Between August 3 (12:00 AM PST) and August 9 (11:59 PM) there were 57 earthquakes in California of magnitude 2.0 or larger. 🔸50 quakes between magnitude 2.0 - 2.9 🔸6 quakes between magnitude 3.0 - 3.9 🔸1 quake between M 4.0 - 4.9 The largest earthquake was a magnitude 4.4 near Covelo, CA.

On the left is an infographic of a map of California showing the earthquakes as red dots of different sizes. On the right is a bar graph showing the numbers of quakes of different magnitudes.

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California Geological Survey @cageosurvey.bsky.social · 03/08/2026

Between July 27 (12:00 AM PST) and August 2 (11:59 PM) there were 52 earthquakes in California of magnitude 2.0 or larger. 🔸46 quakes between magnitude 2.0 - 2.9 🔸5 quakes between magnitude 3.0 - 3.9 🔸1 earthquake between M 4.0 - 4.9 The largest earthquake was a magnitude 4.2 near Cloverdale, CA.

Infographic showing a map of California on the left and a bar graph in the right. The map shows the location of earthquakes marked by red dots of different sizes. The bar graph shows the number of quakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 30/07/2026

In 2023, California remained one of the largest producers of non-fuel minerals in the US. Specifically, California ranked 5th behind Arizona, Minnesota, Nevada, and Texas with a non-fuel mineral production value of 5.6 billion dollars, accounting for approximately 4.85% of the nation’s total.

Pie chart showing the production value of different types of non-fuel minerals. The largest slices of the pie belong to construction sand and gravel, cement, crushed stone, and “other”.

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California Geological Survey @cageosurvey.bsky.social · 27/07/2026

Between July 20 (12:00 AM PST) and July 26 (11:59 PM) there were 46 earthquakes in California of magnitude 2.0 or larger. 🔸42 earthquakes between magnitude 2.0 - 2.9 🔸4 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.6 near Brawley, CA.

Infographic showing a map of California on the left-hand side. The red dots are showing earthquake locations. The size of the dot indicates the relative magnitude of the earthquake. On the right hand side is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 20/07/2026

Between July 13 (12:00 AM PST) and July 19 (11:59 PM) there were 54 earthquakes in California of magnitude (M) 2.0 or larger. 🔸51 earthquakes between M2.0 - 2.9 🔸2 earthquakes between M3.0 - 3.9 🔸1 earthquake between M4.0 - 4.9 The largest earthquake was a magnitude 4.3 near N of Johannesburg, CA.

Infographic with a map of California on the left showing the size and location of earthquakes, and a bar graph on the right showing the number of earthquakes of each magnitude

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California Geological Survey @cageosurvey.bsky.social · 17/07/2026

Explore our Postfire Debris Flow database, an interactive map of debris flow events since 2000, built on data from government agencies, media, scientific literature, and the public. www.conservation.ca.gov/cgs/landslid...

Map of California showing the location of fires that experienced postfire debris-flow (PFDF) events in California from 2000 through 2025.

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California Geological Survey @cageosurvey.bsky.social · 14/07/2026

New Postfire Debris Flow Potential Map! The brand-new California Geological Survey (CGS) Postfire Debris Flow Potential Map depicts the combined annual probability of wildfire and subsequent debris flow that is triggered by rainfall. www.conservation.ca.gov/cgs/bwg/pref...

Map of California showing the estimated annual likelihood of wildfire followed by debris triggering rainfall. Lower likelihood areas are shown in yellow while higher likelihood areas are shown in red and purple. The areas with the highest likelihoods are in the mountainous regions of the state.

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California Geological Survey @cageosurvey.bsky.social · 13/07/2026

Between July 6 (12:00 AM PST) and July 12 (11:59 PM) there were 61 earthquakes in California of magnitude (M) 2.0 or larger. 🔸55 quakes between M2.0 - 2.9 🔸4 quakes between M3.0 - 3.9 🔸2 quakes between M4.0 - 4.9 The largest earthquake was a magnitude 4.4 north of Covelo, CA.

Infographic showing a map of California on the left with the location of earthquakes marked by red dots are very exercises that indicate the size of the earthquake. On the right is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 10/07/2026

Contained in the rocks of the Sierra Nevada is a story that spans more than 500 million years. www.conservation.ca.gov/cgs/sierra-n...

Close-up of the northern part of the Sierra Nevada Atlas map. Different colors represent different rock units.

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California Geological Survey @cageosurvey.bsky.social · 06/07/2026

Between June 29 (12:00 AM PST) and July 5 (11:59 PM) there were 45 earthquakes in California of magnitude 2.0 or larger. 🔸41 earthquakes between magnitude 2.0 - 2.9 🔸4 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.9 near Alder Springs, CA.

Infographic showing a map of California on the left. Earthquakes are shown as red dots of different sizes indicating different magnitudes. On the right is a bar graph showing the number of earthquakes of different magnitudes.

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California Geological Survey @cageosurvey.bsky.social · 24/06/2026

A magnitude 5.6 earthquake occurred 11 km N of Redwood Valley, CA at 8:10 am. This earthquake produced strong to very strong shaking near the epicenter and light shaking that was felt across Northern California. CGS is monitoring the situation. earthquake.usgs.gov/earthquakes/...

Map of the area around the earthquake. The earthquake is marked with a star. The different colors indicate the different levels of shaking, with warm colors indicating stronger shaking, and cooler colors indicating weaker shaking.

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California Geological Survey @cageosurvey.bsky.social · 22/06/2026

Between June 15 (12:00 AM PST) and June 21 (11:59 PM) there were 55 earthquakes in California of magnitude 2.0 or larger. 🔸49 quakes between M2.0 - 2.9 🔸6 quakes between M3.0 - 3.9 The largest quakes were both M3.6. One quake occurred WNW of Johannesburg and the other was N of Searles Valley, CA.

Infographic with a map of California on the left and a bar graph on the right. The map shows the location of earthquakes marked by different sized red dots, while the bar graph shows the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 15/06/2026

Between June 8 (12:00 AM PST) and June 14 (11:59 PM) there were 45 earthquakes in California of magnitude 2.0 or larger. 🔸40 earthquakes between magnitude 2.0 - 2.9 🔸5 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.4 NW of The Geysers, CA.

Infographic showing a map of California on the left with red dots of various sizes showing the location of earthquakes. On the right is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 08/06/2026

Between June 1 (12:00 AM PST) and June 7 (11:59 PM) there were 56 earthquakes in California of magnitude 2.0 or larger. 🔸46 quakes between M2.0 - 2.9 🔸6 quakes between M3.0 - 3.9 🔸3 quakes between M4.0 - 4.9 🔸1 quakes between M5.0 - 5.9 The largest earthquake was a M5.1 W of Petrolia, CA.

On the left is a map of California showing earthquakes as red dots of different sizes. On the right is a bar graph showing the number of quakes of different sizes graphically.

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California Geological Survey @cageosurvey.bsky.social · 01/06/2026

Between May 25 (12:00 AM PST) and May 31 (11:59 PM) there were 61 earthquakes in California of magnitude 2.0 or larger. 🔸56 quakes between magnitude 2.0 - 2.9 🔸5 quakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.9 W of Petrolia, CA. cadoc.maps.arcgis.com/apps/dashboa...

Infographic showing a map of California with earthquakes on the left and a bar graph with the number of each magnitude of earthquake on the right.

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California Geological Survey @cageosurvey.bsky.social · 14/05/2026

Interested in learning more about the newly released Sierra Nevada Earth Science Atlas? Read about it in California Geology Magazine! www.conservation.ca.gov/cgs/document...

Screenshot of the cover page of the article about the Sierra Nevada Atlas. In the center of the page is an image of the map, and along the edges are text.

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California Geological Survey @cageosurvey.bsky.social · 11/05/2026

Between May 4 (12:00 AM PST) and May 10 (11:59 PM) there were 183 earthquakes in California of magnitude 2.0 or larger. 🔸153 earthquakes between M2.0 - 2.9 🔸25 earthquakes between M3.0 - 3.9 🔸5 earthquakes between M4.0 - 4.9 The largest earthquake was a M4.9 WSW of Crescent City, CA

Infographic showing a map of California. Dots show the location of earthquakes and the size of the dot indicates the earthquake magnitude. On the right is a bar graph showing the number of earthquakes of each size.

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California Geological Survey @cageosurvey.bsky.social · 05/05/2026

The newly released Sierra Nevada Atlas is a collection of maps, geospatial datasets, and associated text that presents geologic map layers, geophysical layers, economic geology layers, neotectonic features, and geochronology for the Sierra Nevada. www.conservation.ca.gov/cgs/sierra-n...

Zoomed in view of part of the Sierra Nevada Atlas geologic map. The different colors indicated different geologic formations.

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California Geological Survey @cageosurvey.bsky.social · 04/05/2026

Between April 27 (12:00 AM PST) and May 3 (11:59 PM) there were 43 earthquakes in California of magnitude 2.0 or larger. 🔸34 earthquakes between magnitude 2.0 - 2.9 🔸9 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.7 near Petrolia, CA

Infographic showing a map of California on the left. Earthquakes are indicated by red dots. The size of the dot indicates the relative size of the earthquake. On the right hand side is a bar graph showing the number of earthquakes in each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 30/04/2026

NEW RELEASE! Sierra Nevada Earth Science Atlas The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made. www.conservation.ca.gov/cgs/sierra-n...

Geologic map of the Sierra Nevada mountains and surrounding area. The map shows hundreds of different geologic formations, indicated by different colors and patterns on the map.

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California Geological Survey @cageosurvey.bsky.social · 27/04/2026

NEW RELEASE! Map Sheet 52: Aggregate Sustainability in California Aggregate materials like sand, gravel, and crushed stone are essential to modern society, both to maintain the existing infrastructure and to provide for new construction. www.conservation.ca.gov/cgs/minerals...

Map of California with aggregate production areas outlines in orange. The fill color of the aggregate areas signifies the years of permitted reserves remaining. Bar graphs next to each highlighted area show demand charts of how much reserve exists and the expected 50 year demand on the reserve.

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California Geological Survey @cageosurvey.bsky.social · 27/04/2026

Between April 20 (12:00 AM PST) and April 26 (11:59 PM) there were 40 earthquakes in California of magnitude 2.0 or larger. 🔸30 quakes between M2.0 - 2.9 🔸9 quakes between M3.0 - 3.9 🔸1 quake between M4.0 - 4.9 The largest earthquake was a magnitude 4.1 near Petrolia, CA.

Infographic showing a map of California. Earthquakes are shown as red dots; the size of the dots indicates the magnitude of the earthquake. On the right is a bar graph showing the number of quakes of different magnitudes.

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California Geological Survey @cageosurvey.bsky.social · 20/04/2026

Between April 13 (12:00 AM PST) and April 19 (11:59 PM) there were 28 earthquakes in California of magnitude 2.0 or larger. 🔸26 earthquakes between magnitude 2.0 - 2.9 🔸2 earthquake between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.5 near Ludlow, CA.

Infographic showing a map of California. Earthquakes are indicated by red circles of various sizes. On the right side is a bar graph showing the number of earthquakes of different

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Reposted by California Geological Survey

California Department of Conservation @calconservation.bsky.social · 10/04/2026

@cageosurvey.bsky.social is hiring a Supervising Engineering Geologist to lead the Forest & Watershed Program--oversee THP reviews, landslide/GIS analysis, watershed restoration, & a team of geologists. Apply by 4/17/26: calcareers.ca.gov/CalHrPublic/Jobs/JobPosting.aspx?JobControlId=512006

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California Geological Survey @cageosurvey.bsky.social · 13/04/2026

Between April 6 (12:00 AM PST) and April 12 (11:59 PM) there were 39 earthquakes in California of magnitude 2.0 or larger. 🔸38 earthquakes between magnitude 2.0 - 2.9 🔸1 earthquake between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.2 near Trinidad, CA.

Infographic with a map of California showing the location of earthquakes, marked by red dots. The size of the dot gives the relative size of the earthquake. There is also a bar graph showing the number of quakes in each magnitude range.

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California Geological Survey @cageosurvey.bsky.social · 06/04/2026

Between March 30 (12:00 AM PST) and April 5 (11:59 PM) there were 47 earthquakes in California of magnitude 2.0 or larger. 🔸41 quakes between M2.0 - 2.9 🔸5 quakes between M3.0 - 3.9 🔸1 quakes between M4.0 - 4.9 The largest earthquake was a magnitude 4.6 near Boulder Creek, CA.

Info graphic showing a map of California on the left. Red dots indicate the earthquake locations and the size of the dot indicates the relative magnitude. On the right is a bar graph showing the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 03/04/2026

Joshua Tree National Park is renowned for its forests of Joshua trees, its namesake species. Though less well known but similarly recognizable, the geology and geomorphology are equally important to the iconic landscape that attracts millions of visitors each year.

A large Joshua is in the foreground. A forest of Joshua trees stands in the background. A sloping hill of red- and buff-colored rocks is seen behind the Joshua trees.

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California Geological Survey @cageosurvey.bsky.social · 01/04/2026

The mission of the California Geological Survey is to provide scientific products and services about the state’s geology, seismicity, forests and watersheds, and mineral resources that affect the health, safety, and business interests of the people of California.

Image of a sheer cliff with the waterfall catching the sunlight. The CGS mission is written on the left.

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California Geological Survey @cageosurvey.bsky.social · 30/03/2026

Between March 23 (12:00 AM PST) and March 29 (11:59 PM) there were 46 earthquakes in California of magnitude 2.0 or larger. 🔸41 earthquakes between M2.0 - 2.9 🔸4 earthquakes between M3.0 - 3.9 🔸1 earthquake between M4.0 - 4.9 The largest earthquake was a magnitude 4.1 near Ludlow, CA.

Infographic with a map of California on the left and a bar graph in the right. The map has red dots of different sizes indicating earthquake location and magnitude. The bar graph shows the number of earthquakes of each magnitude.

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California Geological Survey @cageosurvey.bsky.social · 27/03/2026

A tsunami can move more than water. 🌊 Understanding how #tsunami debris and sediment moves and where it might end up is a critical part of preparing for and recovery from a tsunami. 🔍Explore more: www.conservation.ca.gov/cgs/tsunami/...

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California Geological Survey @cageosurvey.bsky.social · 27/03/2026

The @CAGeoSurvey is working with @caloes.bsky.social to create tools and information to help the public & emergency officials understand their tsunami risk & how to prepare for the next tsunami. Learn more about our Cal OES tsunami partner here: www.youtube.com/watch?v=tq_p... #tsunami

youtube.com

Todd Becker I Am Cal OES

YouTube video by Cal OES

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California Geological Survey @cageosurvey.bsky.social · 26/03/2026

🌊 #Tsunami are a series of powerful waves often caused by underwater earthquakes or landslides. As tsunami waves approach the shore, they build in size, their currents intensify, and they become a threat to life & property. Go to tsunami.ca.gov for more information.

Color graphic showing how a tsunami is generated by an underwater earthquake. The ocean floor moves vertically, displacing a large amount of water. Waves are generated and move out in all directions across the ocean, some traveling as fast as 600 miles per hour. As waves enter shallow water nearshore, they compress, their speed slows, and they build in height. The wave height increases, and associated currents intensify, becoming a threat to life and property.

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California Geological Survey @cageosurvey.bsky.social · 24/03/2026

It’s Tsunami Awareness Week! California Tsunami Hazard Area Maps & Data are prepared to assist citizens, cities, and counties in identifying their tsunami hazard. tsunami.ca.gov/maps #TsunamiReady @CalConservation Be sure to have a tsunami plan and know your zone. www.tsunamizone.org/knowyourzone/

Poster showing official and natural tsunami warning signs. These may include a sudden rise or fall of the ocean, hearing a loud roaring from the ocean, and feeling a strong or long earthquake.

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California Geological Survey @cageosurvey.bsky.social · 23/03/2026

Between March 16 (12:00 AM PST) and March 22 (11:59 PM) there were 48 earthquakes in California of magnitude 2.0 or larger. 🔸41 earthquakes between magnitude 2.0 - 2.9 🔸7 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.7 near Petrolia, CA.

Infographic showing map of California showing the locations of the earthquakes as red dots of different sizes. On the right is a bar graph of numbers of earthquakes of different sizes.

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California Geological Survey @cageosurvey.bsky.social · 16/03/2026

Between March 9 (12:00 AM PST) and March 15 (11:59 PM) there were 43 earthquakes in California of magnitude 2.0 or larger. 🔸40 earthquakes between magnitude 2.0 - 2.9 🔸3 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.3 near Rio Dell, CA.

Infographic showing map of California and recent earthquakes on the left and a bar chart on the right.

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California Geological Survey @cageosurvey.bsky.social · 09/03/2026

Between March 2 (12:00 AM PST) and March 8 (11:59 PM) there were 52 earthquakes in California of magnitude 2.0 or larger. 🔸47 earthquakes between magnitude 2.0 - 2.9 🔸5 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.6 near The Geysers, CA.

Infographic that shows a map of California on the left. Red dots of different sizes show the locations of earthquakes of different magnitudes. On the right as a bar graph showing the number of earthquakes of different sizes.

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California Geological Survey @cageosurvey.bsky.social · 02/03/2026

Between February 23 (12:00 AM PST) and March 1 (11:59 PM) there were 44 earthquakes in California of magnitude 2.0 or larger. 🔸39 earthquakes between magnitude 2.0 - 2.9 🔸5 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.6 near Johannesburg, CA.

Infographic with a map of CA. Red dots are earthquakes and the sizes of the dots indicate the magnitude. On the right is a bar graph showing the number of earthquakes of different sizes.

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California Geological Survey @cageosurvey.bsky.social · 25/02/2026

The California Geological Survey is thrilled to announce the release of the newest edition of California Geology Magazine! www.conservation.ca.gov/cgs/document...

Image of sunlight filtering through a slot canyon. At the top in white letters it reads “California Geology”. At the bottom it includes small lettering outlining articles that can be found inside. Across the middle it says “New Release” in yellow.

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California Geological Survey @cageosurvey.bsky.social · 23/02/2026

Between February 16 (12:00 AM PST) and February 22 (11:59 PM) there were 63 earthquakes in California of magnitude 2.0 or larger. 🔸60 quakes between M2.0 - 2.9 🔸2 quakes between M3.0 - 3.9 🔸1 quakes between M4.0 - 4.9 The largest earthquake was a magnitude 4.2 near Cobb, CA.

infographic showing a map of California on the left-hand side. Dots of different sizes indicate the location of earthquakes and their relative magnitudes. On the right hand side is a bar graph showing the number of earthquakes of different sizes.

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California Geological Survey @cageosurvey.bsky.social · 10/02/2026

Between February 2 (12:00 AM PST) and February 8 (11:59 PM) there were 36 earthquakes in California of magnitude 2.0 or larger. 🔸97 earthquakes between M2.0 - 2.9 🔸8 earthquakes between M3.0 - 3.9 🔸2 earthquakes between M4.0 - 4.9 The largest earthquake was a magnitude 3.7 west of Petrolia, CA.

Infographic showing a map of California with earthquakes shown as dots of various sizes and a bar graph

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California Geological Survey @cageosurvey.bsky.social · 02/02/2026

Between January 26 (12:00 AM PST) and February 1 (11:59 PM) there were 36 earthquakes in California of magnitude 2.0 or larger. 🔸31 earthquakes between magnitude 2.0 - 2.9 🔸5 earthquake between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.4 near San Ramon, CA.

Map of California with earthquake locations indicated by red dots. The size of the dot indicates the relative magnitude. On the right is a bar graph showing the magnitude of different earthquakes that have occurred in the last week.

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