Our mission is to develop and share cutting-edge earthquake system science to enhance California’s resilience and to educate and inspire future scientists.
California
Joined December 2012
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Statewide California Earthquake Center retweeted
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 M2.0 - 2.9
🔸5 quakes between M3.0 - 3.9
The largest earthquake was a magnitude 3.9 W of Petrolia, CA.
cadoc.maps.arcgis.com/apps/d…
ALT 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.
Statewide California Earthquake Center retweeted
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 of M2.0 - 2.9
🔸25 earthquakes of M3.0 - 3.9
🔸5 earthquakes of M4.0 - 4.9
The largest quake was a M4.9 WSW of Crescent City, CA
ALT 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.
Statewide California Earthquake Center retweeted
This excellent new animation from @UNDRR shows earthquake safety actions and also includes guidance for people who use mobility devices; learn what to do in other settings at EarthquakeCountry.org/step5 and ShakeOut.org/dropcoverholdon
🫸 Drop! Cover! Hold on!
If the ground starts shaking & you're indoors, this reflex can protect you.
Run a Drop, Cover, Hold On drill – & make it a habit. The reflex it builds can last a lifetime.
➡️ ow.ly/8L5150YQsu2 #BuildingResilience #EarthquakeDay #DropCoverHoldOn
Statewide California Earthquake Center retweeted
"Earthquakes are one of nature's deadliest hazards. In seconds, they can turn homes into ruins, undo decades of progress & claim thousands of lives." - Guterres
Most earthquake deaths result from collapsing buildings ➡️ ow.ly/W1ZM50YR6Jj #EarthquakeDay #BuildingResilience
ALT Quote by António Guterres on earthquakes emphasizing inevitability but preventable devastation for International Day in Memory of Earthquake Victims.
Statewide California Earthquake Center retweeted
📢 Smart public policies can prevent earthquake disasters.
Most earthquake deaths result from damage to buildings & infrastructure – we can protect people from this.
🕯️ Remember. Protect. Build disaster resilience.
➡️ ow.ly/Ie8o50YQwTC #BuildingResilience #EarthquakeDay
ALT Infographic showing 4 ways to make buildings safer from earthquakes: Build, Invest, Learn, and Foster preparedness with specific actions under each category.
Statewide California Earthquake Center retweeted
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 earthquakes between magnitude 3.0 - 3.9
The largest earthquake was a magnitude 3.5 near Ludlow, CA.
ALT 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 magnitudes
Statewide California Earthquake Center retweeted
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.
ALT 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.
Statewide California Earthquake Center retweeted
The 2025 Great @ShakeOut press conference at the @LACity Emergency Operations Center featured remarks from Los Angeles Mayor @KarenBass and leaders of @ECA, @LAFD, @ReadyLA, @Cal_OES, @SCEC, @RedCrossLA, and @ENLA_VOAD.
Statewide California Earthquake Center retweeted
The 2025 California Tsunami Preparedness Week is from March 22 to March 30. Become #TsunamiReady by learning essential information about staying safe before, during, and after a Tsunami. Visit TsunamiZone.org/California to participate! #TsunamiPrep
Statewide California Earthquake Center retweeted
Your Action Plan for the Seven Steps to Earthquake Safety provides simple advice for each step with space for noting your plans. This document is translated into 16 languages! Access the document at EarthquakeCountry.org/langua….
Statewide California Earthquake Center retweeted
Our ECA SoCal Winter 2025 Workshop is on Feb 20 in Newport Beach! Join us for expert insights on tsunami hazards, earthquake info tools, and how we can all advance collaborative science, engineering, and preparedness policy. Register now at: EarthquakeCountry.org/scwi25 #Preparedness
Statewide California Earthquake Center retweeted
Throwing down the challenge! October 17th is the #GreatShakeOut. Take the day to post as many earthquake and @ShakeOut preparedness and participation messages as possible, and
@npdcoalition will reshare them. Let's make this the biggest #earthquake readiness @X social sharing campaign ever!!!! Remember@npdcoalition
will be watching. 👁️📷 @jemsconnect @EaglesGather @EMS1 @NASEMSO
Statewide California Earthquake Center retweeted
10.5 Million #Californians Set to #ShakeOut this Thursday, October 17! einpresswire.com/article/752… via @ein_news
Statewide California Earthquake Center retweeted
Join Millions on October 17 at 10:17 a.m. for the world's largest earthquake drill!
California, with over 10,000 quakes annually, must stay prepared.
Learn more & register for the ShakeOut at ShakeOut.org.
#ShakeOut #EarthquakeSafety
Statewide California Earthquake Center retweeted
Have you taken the Step to Secure Your Space? Using the worksheets at EarthquakeCountry.org/Step1, identify earthquake hazards and map out a plan.
Further instructions for #Step1 of the #SevenSteps to #earthquake #safety can be found at EarthquakeCountry.org/Step1!
@Cal_OES @FEMA @SCEC
Statewide California Earthquake Center retweeted
Good morning Southern California! Did you feel the magnitude 4.7 quake about 4 miles north of Malibu? The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthqua… @CAGeoSurvey @Cal_OES @USGS_Quakes
ALT ShakeMap from the magnitude 4.7 quake near Malibu.
Statewide California Earthquake Center retweeted
Got a shakealert for this one
#AutoEQ A magnitude 4.6 (MI) #earthquake has occurred 5 mi N of Malibu, CA at 07:28 PDT Sep 12, 2024 [2024-09-12 14:28 UTC]. #SCSN has not yet confirmed this event. For more info visit earthquake.usgs.gov/earthqua…
Statewide California Earthquake Center retweeted
Falling or flying objects usually cause the most injuries during earthquakes, and replacing or repairing items can be very costly. Prevent this by following #Step1 of the #SevenSteps to #earthquake #safety, “Secure Your Space” at EarthquakeCountry.org/Step1.
@Cal_OES @FEMA @SCEC
Statewide California Earthquake Center retweeted
Scale model of the apartment complex that collapsed during the 1994 Northridge Earthquake. Note that these all were three storey buildings *before* the quake. The weak ground floor collapsed due to the shaking.
Great outreach material at the #SCECmeet
ALT Scale model of the apartment complex that collapsed during the 1994 Northridge Earthquake.
