fotka #6 / 10, počet zobrazení : 193x


..:: komentáre od návštevníkov ::..
04. 08. 2012  23:37:12MiltonI would call it underestimating the patinteol of foreshocks. I agree we dont have any empirical formula (someting like omori's law) but still foreshock still have its importance. In the above diagram as we can noticing the foreshocks vanishing prior to the main shock are usually considered seismic quiescence period (in retrospection), which indicate the development of stress in the region. When stress accumulation crosses the threshold stress value (abstract term) the is a shock. Such quiescence periods have been noticed before many large earthquakes. During this time window there are drastic changes in b-value and z-value (which seismologist usually use).Basically there are two schools of seismologist, one believing that we can predict an earthquake to some extent and another who believes that it is impossible.Sometimes even radon gas anomaly is used for studying earthquake precursor. Regarding the recent volcano in Japan, it is could also have been triggered by the earthquake. The stress enhancement and the changes in fluid flow caused by quake are the prominent reason.

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..:: EXIF data ::..
IMGP04831.jpg
Model
PENTAX Optio S
Exposure time
0.5''
FNumber
f/3.5
Exposure bias
0
ISO rating
N/A
Focal length
10.2 mm
Focal length (on 35mm film)
62 mm
Created
01. 01. 2004, 00:14:29


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