Realist News (Jsnip4)

Full Version: Swarm of 5+ Quakes in Alaska.
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Tuesday June 28 2011, 06:48:33 UTC 5.8 DEPTH (in km)39.0
Tuesday June 28 2011, 06:48:34 UTC 5.8 DEPTH (in km)41.3
Tuesday June 28 2011, 06:54:01 UTC 5.3 DEPTH (in km)43.2
Tuesday June 28 2011, 07:32:27 UTC 5.1 DEPTH (in km)37.3

http://quakes.globalincidentmap.com/

Guest

It's 22.37 uk time and I have just counted 20 earthquakes in Alaska on the usgs website, come tomorrow I am willing to bet this number will have been reduced.

solrey

Those were just some aftershocks in the same location as the 7.2 quake about 5 days ago. Note the lat./lon. in the location details at each of the following links.

Magnitude 7.2 - FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA 2011 June 24 03:09:40 UTC

Magnitude 5.8 - FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA 2011 June 28 06:48:34 UTC

Magnitude 5.3 - FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA 2011 June 28 06:54:01 UTC

Magnitude 5.1 - FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA 2011 June 28 07:32:27 UTC

Quote:It's 22.37 uk time and I have just counted 20 earthquakes in Alaska on the usgs website, come tomorrow I am willing to bet this number will have been reduced.

Sometimes initially there are multiple entries for the same quake, especially if more than one seismic monitoring station picks it up, because the alerts are generated automatically. Once they're reviewed by a geologist they revise and consolidate duplicate reports as necessary. The mag 5.8 quake at 6:48:33 and :34 listed in the OP is an example of a duplicate entry for the same quake that has since been consolidated to one, which I linked above. That's just a routine part of certain types of data collection, much like accounting for multiple reports of the same tornado to produce a more accurate total tornado count.

cheers
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