2 x M 6.8 quakes 2 days in a row

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SUMMARY

On March 10, 2014, two significant seismic events were recorded: a magnitude 6.8 earthquake offshore of northern California in the Mendocino Fracture Zone and another magnitude 6.8 quake east of the South Sandwich Islands. The latter event was later downgraded to a magnitude 6.4 by the USGS, highlighting the common occurrence of initial magnitude revisions. The discussion emphasized the importance of real-time seismic data, with updates available every five minutes from the provided seismogram link.

PREREQUISITES
  • Understanding of seismic event magnitudes and their implications
  • Familiarity with the Mendocino Fracture Zone and the Juan De Fuca Plate
  • Knowledge of seismic data interpretation and monitoring tools
  • Awareness of USGS earthquake reporting practices
NEXT STEPS
  • Research the Mendocino Fracture Zone and its seismic activity patterns
  • Explore the USGS earthquake reporting system and its magnitude revision process
  • Learn about real-time seismic monitoring tools and their applications
  • Investigate the effects of earthquake propagation on recorded amplitudes
USEFUL FOR

Seismologists, earthquake researchers, and anyone interested in understanding seismic events and monitoring techniques will benefit from this discussion.

davenn
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hi guys

as per title
Yesterday, 10 March 2014 there was a M 6.8 offshore of northern California in the Mendocino Fracture Zone of the Juan De Fuca Plate

Just coming in on the seismo right now is another M 6.8, east of the South Sandwich Islands
right at the southern end of the Atlantic Ocean

seismo at http://www.sydneystormcity.com/seismograms.htm

The nthrn Calif can be seen at the top of the display with the new event at the bottom
the display updates every 5 minutes.
I'm expecting similar to slightly larger amplitude as the event is a little closer to my sensor
But variations in propagation can change that

cheers
Dave
 
Last edited:
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its just been downgraded to a M 6.4 by the USGS. released magnitudes do sometimes vary and get updated over the first several hours.

attachment.php?attachmentid=67510&stc=1&d=1394509056.gif






Dave
 

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Well that was a huge letdown :frown:
ohh well
The event is now tailing off

attachment.php?attachmentid=67511&stc=1&d=1394511754.gif



cheers
Dave
 

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