WHEN THE EARTH SHRUGS
Hourly Animation of Recent Earthquakes (last 7 days) and 24h Forecast
Click for the current worldview

California/Nevada (filesize: [an error occurred while processing this directive])
Click on an area to zoom on the latest (takes you offsite to USGS)
California/Nevada 125-41 124-41 123-41 122-41 121-41 120-41 119-41 118-41 117-41 116-41 115-41 125-40 124-40 123-40 122-40 121-40 120-40 119-40 118-40 117-40 116-40 115-40 125-39 124-39 123-39 122-39 121-39 120-39 119-39 118-39 117-39 116-39 115-39 125-38 124-38 123-38 122-38 121-38 120-38 119-38 118-38 117-38 116-38 115-38 125-37 124-37 123-37 122-37 121-37 120-37 119-37 118-37 117-37 116-37 115-37 125-36 124-36 123-36 122-36 121-36 120-36 119-36 118-36 117-36 116-36 115-36 125-35 124-35 123-35 122-35 121-35 120-35 119-35 118-35 117-35 116-35 115-35 125-34 124-34 123-34 122-34 121-34 120-34 119-34 118-34 117-34 116-34 115-34 125-33 124-33 123-33 122-33 121-33 120-33 119-33 118-33 117-33 116-33 115-33 		Real-time 24 Hour Forecast
Click on an area to zoom on it (takes you offsite to USGS)
Prediction


EXPLANATION

This animation provides an accelerated view of the quakes which occurred during the past 168 hours (168 frames = 7 days) in California and Nevada.

This animated gif is composed of frames downloaded hourly from one of these servers:
  • quake.wr.usgs.gov/recenteqs/latest.htm
  • pasadena.wr.usgs.gov/recenteqs/
  • www.scecdc.scec.org/recenteqs/
All frames are shown for 25ms each, except for the most current frame which is shown first for 3 seconds. The animation will cycle repeatedly through the 168 frames, pausing only at the beginning and end of the cycle.

Animation Images Source: USGS-UCB-Caltech-UCSD-UNR - Prediction Image Source: pasadena.wr.usgs.gov/step/

Animated GIFs can be a bit slow on some browser. To see the above animation at full speed, you may want to right-click on the image and save it to your desktop for later viewing outside the browser.

Once we accumulate enough raw images, we'll offer a custom-animation page where you can create and display an on-the-fly animation after selecting the time-interval, time-span and time-direction of interest to you.

Caveat: The recent-quake snapshots collected from the servers above include both automated and human-checked data. According to the source, their automated system is pretty good at analyzing and interpreting data, but it's not foolproof--which is why human analysts are there as well. Through the automated system, junk can find its way onto those maps (e.g. microwave glitches that the system misinterprets as quakes), and it stays there until an analyst identifies it as garbage and deletes it. Thus our hourly downloads are capturing a mixture of verified and unverified events. While these recent-quake sites are continuously updating to correct inaccurate data and delete junk, our animation preserves whatever we downloaded, including what may be spurious data. (These can usually be identified as signals that do not last for more than a few frames.)

Classical Archives' main offices are located in California and we have a vested interest in observing these events.

Pierre R. Schwob, for
The Classical Archives Team
Located in Palo Alto, CA