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Originally posted by psilo simon
Hi earthquakers, I have a question about the amount of earthquakes on the USGS map.
The map shows earthquake activity in the past week, right up to the last hour, and Iv`e been looking at it everyday pretty much since the Haiti earthquake, and it appears that there is usually around 260-290 (ish) quakes at any one time on the map.
Now, Iv`e noticed this number dropping to 169 (today at 17:11 UTC).
I started noticing this drop a few days ago, and it has steadily decreased.
My question is, is this a known phenomenon, i,e after a couple of biggies and their respective aftershocks, do the number of quakes fall once everything has calmed, or could this possibly be a "calm before the storm" type of thing, like, could the fall in numbers indicate a possible big quake coming soon?
Forgive my tectonic ignorance if this is a silly question, it`s just a question that came to me as I noticed the quakes depleting in number recently.
Thanks in advance,
ETA USGS link
[edit on 30-3-2010 by psilo simon]
Originally posted by Picao84
Seems USGS doesnt show results from some regions of europe. I say this because in the last 5 days, south of Portugal (where one fault exists) suffered one 4.1 (saturday) and one 4.2 (today) quakes. There wasnt deads or material damage, but still its not quite normal here to have 2 earthquakes in less than a week, not even talking in 4.0+ ones.
I hope this is not sign of a bigger one to come, not unlike the one from 1755. Right after the HAITI one, on a tv show, a guy talked about how the 1755 one ocurred not far from one in HAITI at the time.
- All of you
Is this a good thing or a bad thing? I don't know what it means
Originally posted by slidingdoor
Am I imagining things or have USGS snuck in a couple of Antartica 5 pointers, they are shown as yellow being both over a day and an hour old but as a regular watcher of the global usgs page i don't recall seeing those two ?
Originally posted by Anmarie96
reply to post by PuterMan
why are Their sites down ?