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@USGS_ShakeAlert • 50,013 subscribers

ShakeAlert EEW System public safety information, news, and updates. ShakeAlert contributes to a Hazard Ready Nation (HRN). Posts & "likes" are not endorsements.

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At 5:12 am on April 18, 1906, a magnitude 7.9 #earthquake shook San Francisco for over 60 seconds igniting several fires that burned for three days and destroyed nearly 500 city blocks. Today we commemorate 120 years of #seismic discovery, research, and resilience. USGS Earthquakes USGS California Governor's Office of Emergency Services Berkeley Seismo Lab California Geological Survey Caltech Seismo Lab San Francisco Department of Emergency Management SSA
1:15
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At 5:12 am on April 18, 1906, a magnitude 7.9 #earthquake shook San Francisco for over 60 seconds igniting several fires that burned for three days and destroyed nearly 500 city blocks. Today we commemorate 120 years of #seismic discovery, research, and resilience. USGS Earthquakes USGS California Governor's Office of Emergency Services Berkeley Seismo Lab California Geological Survey Caltech Seismo Lab San Francisco Department of Emergency Management SSA

USGS ShakeAlert

42,185 views • 2 months ago

Check out this USGS computer simulation of the shaking from the magnitude 5.2 Julian, CA earthquake on 4/14 at 10:08am. More info: Over 7 million #ShakeAlert-powered alerts were delivered to cell phones. Did you get an alert? USGS_Quakes Caltech Seismo Lab
0:35
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Check out this USGS computer simulation of the shaking from the magnitude 5.2 Julian, CA earthquake on 4/14 at 10:08am. More info: Over 7 million #ShakeAlert-powered alerts were delivered to cell phones. Did you get an alert? USGS_Quakes Caltech Seismo Lab

USGS ShakeAlert

31,922 views • 1 year ago

Today #ShakeAlert #EEW gets a boost! It's even more ready to take on the biggest quakes. It now includes Global Navigation Satellite System (GNSS) sensors that detect Earth-surface movement via satellite. GNSS includes the well-known US-based Global Positioning System (GPS).USGS
0:41
USGS_ShakeAlert's profile picture

Today #ShakeAlert #EEW gets a boost! It's even more ready to take on the biggest quakes. It now includes Global Navigation Satellite System (GNSS) sensors that detect Earth-surface movement via satellite. GNSS includes the well-known US-based Global Positioning System (GPS).USGS

USGS ShakeAlert

21,979 views • 2 years ago

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