By Mitch Battros - ECTV
An unusual sequence of quakes occurred earlier today. Although it does occur from time to time, it is unusual to see a swarm of quakes to begin at lower magnitudes and gradually escalate.
Notice the first quake measured 3.6 mag., the second at 4.1 mag. and the forth at 5.5 mag. (see chart below)
In past interviews, Jim Berkland – Geologist, has made reference to increased, and sometimes unusual earthquake occurrence due to “water displacement”. Actually, it is liquid displacement such as oil, magma and water. It certainly could be as a result of “record breaking rain” as result of ongoing hurricane and tropical storms. However, in this case in could be magma movement since the readings of this swarm is only thirty miles from Long Valley Caldera.
I have been told this newly forming storm will be dragged by ‘Ivan’. Its course will not be known for several hours. It has a preliminary course towards North Carolina, but a cone of impact can range from North Florida to Massachusetts. Ivan is having a major effect both in its early formation and in its ultimate destination.
DATE TIME Latitude Longitude Depth Magnitude Comments
yyyy/mm/dd hh:mm:ss degrees degrees km
2004/09/18 23:43:41 38.02N 118.66W 11.3 5.4 CENTRAL CAL
2004/09/18 23:02:17 38.01N 118.68W 7.6 5.5 CENTRAL CAL
2004/09/18 12:52:16 42.78N 1.43W 1.3 4.8 PYRENEES
2004/09/18 12:39:20 37.99N 118.72W 0.4 3.6 CENTRAL CAL
2004/09/18 07:08:00 37.99N 118.69W 1.5 4.1 CENTRAL CAL
2004/09/18 07:07:48 23.11N 67.57W 10.0 5.5 NORTH ATLANTIC OCEAN
2004/09/18 07:07:10 38.01N 118.62W 5.0 3.6 CENTRAL CAL