A light 4.5 Magnitude earthquake occurred this morning in southwest Utah. Ordinarily, an earthquake of this size and distance would not show very well on my seismograph but this one shows a nice return after bandpass filtering using the AmaSeis software. This earthquake was in the desert area that my brothers and I drove through a couple of years ago between Caliente, NV and Hanksville, UT.
Results from the USGS Arrival Time calculator are shown below:
DATE-(UTC)-TIME LAT LON DEPTH MAG Q COMMENTS 2011/01/03 12:06:36 38.25N 112.37W 0.3 4.5 UU: UTAH Expected 20s period surface wave amplitude [ 1.67E+00 µm] [ 5.23E-01 µm/s] Expected 1s period body wave amplitude [ 1.38E-02 µm] [ 8.66E-02 µm/s] delta azimuth (degrees clockwise from north) (deg) eq-to-station station-to-eq 23.61 74.8 274.3 travel arrival time # code time(s) dy hr mn sec 1 P 312.73 0 12 11 48 2 P 312.76 0 12 11 48 3 pP 312.82 0 12 11 48 4 pP 312.85 0 12 11 48 5 sP 312.86 0 12 11 48 6 sP 312.89 0 12 11 48 7 PnPn 339.22 0 12 12 15 8 PcP 537.12 0 12 15 33 9 S 569.06 0 12 16 5 10 pS 569.17 0 12 16 5 11 sS 569.22 0 12 16 5 12 S 571.56 0 12 16 7 13 SPg 571.58 0 12 16 7 14 sS 571.70 0 12 16 7 15 Sn 588.90 0 12 16 24 16 sSn 589.02 0 12 16 25 17 SnSn 606.76 0 12 16 42 18 ScP 756.59 0 12 19 12 19 PcS 756.63 0 12 19 12 20 ScS 983.25 0 12 22 59 21 PKiKP 1000.75 0 12 23 16 22 pPKiKP 1000.85 0 12 23 16 23 sPKiKP 1000.89 0 12 23 16 24 SKiKP 1213.20 0 12 26 49 25 PKKPdf 1911.09 0 12 38 27 26 SKKPdf 2123.54 0 12 41 59 27 PKKSdf 2123.58 0 12 41 59 28 SKKSdf 2336.00 0 12 45 31 29 P'P'df 2420.30 0 12 46 56 30 P'P'ab 2552.51 0 12 49 8 31 S'S'df 3270.79 0 13 1 6 32 LQ 599.33 0 12 16 35 33 LR 665.17 0 12 17 41
Murmurs from the Earth... 