Maybe we should start getting nervous a little. If you look back in May, which I didn't report not one earthquake, we had loads of activity. About yesterday's rumblings, this is what the institute has to say about the two earthquakes yesterday: "According to USGS event 06:45 pm was M = 6. 2 and P = 9 7 km event 09:15 pm was M = 6. 4 and P = 5 9 km according to EMSC event 06:45 pm was M = 5. 9 and P = 10 km event 09: 15 pm was m = 5. 8 and P = 2 km these differences remind us that the location and magnitude of an earthquake are not easy much less when earthquakes occur offshore, away from stations that can register (that usually will be those that are on the Mainland). Assuming that both events are relatively close each other as evidenced by seismological centres, how to explain that the accelerations of the first were greater than the second? A common thing in both centers is that they report the first event as deeper than the second. In Costa Rica the accelerations of the first were much larger than the second. If the first earthquake was stronger, that makes little sense. However, if the second event was stronger, as suggested by the USGS, but more shallow as evidenced by the two seismic centers, then the reason for the differences in acceleration as marked between the earthquake from 06: 45 pm and 09: 15 pm should be mainly the depth. Indeed, if the second earthquake was stronger, but more shallow, most of their energy is due release very near the epicentral area, therefore, its influence at great distances to which would be our country, would have been necessarily less and would be reflected in lower values of acceleration. The importance of the depth in the area of impact of an earthquake can be understood better with this analogy which had already explained above: http://www.lis.ucr.ac.cr/index.php?id=30 (Translated by Bing)" To clarify why it is felt different in various locations, I ripped off this illustration from the University of Costa Rica's website..... Sorry folks, BLOGGER is NOT recognizing returns (space inbetween lines) so it's gunna look like this for now. This is why I do facebook and not blogger now.....
Monday, June 4
Saturday, June 2
their page on Facebook. It was translated so it may not be the same word for word. You know lately how it takes an earthquake to get me to post, well, I'm happy I read about it cause I did not feel a thing. A big semi truck passes and it sometimes causes the earth to vibrate so who can tell?? This is the report from the University of Costa Rica:
Posted by la Macha on Saturday, June 02, 2012