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Originally posted by PuterMan
Better grab your bargain earthquakes while you can.
Oregon will be a 6.0, or possibly a 6.1 eventually some time 8 days in the future.
The Gulf of California will be a 7.0 but probably not until it hits ANSS
The two Indonesian Mag 8 quakes remain anomalous.
That warning was issued April 9th. Perhaps they just got their location a bit off ...????
Robinesque Ruminations is Magic in my humble opinion because hide love and feelings...in my humble opinion.Love for people like a hundred years ago..ago...Titanic....
Anything of a speculative nature to do with Yellowstone / Fracking / Arkansas / Bird Deaths / Hudson Bay / Life / Death / Resurrection / the Economy / Politics / Religion etc you can post on the thread hosted by Robin Marks/Eric Blair: Robinesque Ruminations
Focal Mechanisms (aka Beach Balls)
A focal mechanism is a fancy way of saying which way the fault moved during an earthquake and is often derived automatically by computer based analysis of seismograms. A "beach ball" symbol is used to visualize this movement. The beach ball is a sphere cut into quarters and shaded with alternating colors, usually white and some other color. In our example we use white and red.
The two "slices" through the beach ball represent the two possible orientations of the plane of the fault. The computers look at the waveforms from as many seismographs as possible and by looking at the direction the ground first starts to move at each location, they can compute which way the fault moved. Unfortunately, there's always two possible solutions, each orthogonal to each other. However, it's pretty easy to determine which fault plane is the correct one by comparing the computed solutions with the orientation of known faults. One of the computed solutions usually lines up very closely to the direction of the fault which produced the earthquake.
The other feature of a beach ball are the colored quadrants. These quadrants represent the stress field around the hypocenter, with the tension axis (where strain is reduced) represented by the white quadrants, and the pressure axis (where strain increases) represented by the red quadrants. A simpler way to look at it is that it represents the direction of motion, that being from white to red.
Sometimes the beach ball is difficult to understand due to it's orientation. Sometimes it's just a flat line drawing. Just remember, the image you are looking at is supposed to be a 3 dimensional sphere.
I wish it would cookie the settings I chose on the left.
Your search parameters are:
Date Time Lat Lon Depth Mag Magt Nst Gap Clo RMS SRC Event ID
2007/09/12 11:10:26.83 -4.4380 101.3670 34.00 8.50 Me 411 1.03 NEI 200709124038
PDE 2007 09 12 111026.83 -4.44 101.37 34 8.5 MwGCMT 6CM .TS....
PDE 2007 09 12 234903.72 -2.62 100.84 35 7.9 MwGCMT 6CM .......
Two 8's on the same day rare? NO
Originally posted by muzzy
reply to post by lovemyworld
CERC (Christchurch Earthquake Recovery Commission) should read that and take note
Punga and Flax houses for the new ChChedit on 12-4-2012 by muzzy because: (no reason given)
Originally posted by muzzy
reply to post by PuterMan
I forget where I got that data from now, I'll have to look back on my files.
A spate of earthquakes across the middle of the U.S. is “almost certainly” manmade, and may coincide with wastewater from oil or gas drilling injected into the ground, U.S. government scientists said in a new study.
Researchers from the U.S. Geological Survey said that for the three decades until 2000, seismic events averaged 21 a year in a central U.S. region. They jumped to 50 in 2009, 87 in 2010 and 134 in 2011.
Date/Time: 2012/1/10 18:36:59
Lat: 2.452 Long: 93.209
Region: W of Sumatra, Indonesia
Mw 7.2 [usgs] Ms 7.1 [ras]
Ms 7 [usgs] mb 6.6 [usgs]
Depth: 20.5 km
Deaths: 0 Injuries: 0
Catalog Source: usgs/neic