Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.
Earthquake swarm
Complete caption
Each red bar shows the number of earthquakes daily detected (left-handside scale). More than 16,000 earthquakes were detected within 2 years. White circles show the magnitude of ~1,400 earthquakes which could be located (right-handside magnitude scale). Sismalp (the local monitoring network) was not able to locate all events below magnitude 1, which explains why very-small-magnitude events are seemingly lacking. (According to the Gutenberg–Richter law, M0 events are approximately 10 times more numerous than M1 events.)[1]
| Part of a series on |
| Earthquakes |
|---|
 |
In seismology, an earthquake swarm is a sequence of seismic events occurring in a local area within a relatively short period. The time span used to define a swarm varies, but may be days, months, or years. Such an energy release is different from the situation when a major earthquake (main shock) is followed by a series of aftershocks: in earthquake swarms, no single earthquake in the sequence is obviously the main shock. In particular, a cluster of aftershocks occurring after a mainshock is not a swarm.[2]
- ^ Jenatton, Liliane; Guiguet, Robert; Thouvenot, François; Daix, Nicolas (2007). "The 16,000-event 2003-2004 earthquake swarm in Ubaye (French Alps)". J. Geophys. Res. 112 (B11): 304. Bibcode:2007JGRB..11211304J. doi:10.1029/2006JB004878. S2CID 129318590.
- ^ Horálek, Josef; Fischer, Tomáš; Einarsson, Páll; Jakobsdótir, Steinunn (2015). "Earthquake swarms". In Beer, Michael; Kougioumtzoglou, Ioannis; Patelli, Eduardo; Au, Siu-Kui (eds.). Encyclopedia of Earthquake Engineering. Berlin: Springer. pp. 871–885. doi:10.1007/978-3-642-35344-4. ISBN 978-3-642-35343-7.
Previous Page Next Page
