Recent Recorded California Earthquakes

Written: Thursday May 18th at 10:37 AM

Within the past 24 hours there have been seven earthquakes in Southern California, each of which with a magnitude of 2.2 or below (earthquaketrack.com). Although earthquakes of this magnitude are not even considered “minor” on the Richter scale and are generally not felt, their occurrences and closeness to one another are unsettling nonetheless. The last 30 Days has seen 190 earthquakes in the last thirty days in Southern California, the largest of which actually occurred less than 48 hours ago. Isla Vista experienced a “slight” 4.1 magnitude quake at 9:42 pm, though no reports of damage were reported.  While earthquakes of a relatively small magnitude do not literally “shake” us and therefore may be easy to ignore, it is important to remember that at one point or another, an earthquake of larger magnitude will occur; it is just a matter of when.

For years, there has been extensive discussion about when “the big” earthquake will hit. It has been suggested that Southern California is “overdue” for a big earthquake, which could hit at any time. Although many people would prefer to simply ignore Southern California’s precarious position in relation to the San Andreas Fault. According to the San Andreas Fault website, “the big one”, although “hypothetical”,  is expected to have a magnitude of 8 or greater. Proper steps must be taken to ensure that the negative impacts of this earthquake are as minimal as possible. This is of particular importance in urban areas, due to larger populations and the types of buildings found in these particular places. It is evident that there has been a greater awareness of the threat of these quakes when considering the recent mandatory seismic retrofit ordinances that have been passed in Southern California as well as other areas of California. The recent discourse around the somewhat small but frequent earthquakes that have been occurring, in addition to the imminent threat of a much larger one, has led to a greater understanding the need and importance of seismic retrofitting. The implementation of mandatory seismic retrofit ordinances for possibly vulnerable buildings will benefit and serve thousands of buildings, but most importantly save the lives of those who live in buildings that may be severely impacted by a large and devastating earthquake.

 

References

http://www.geo.mtu.edu/UPSeis/magnitude.html

http://earthquaketrack.com/v/la/recent

http://www.sanandreasfault.org/BigOne.html

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