Sunday, October 19, 2014

Magnitude 4.2 Earthquake of Rio Dell, California USA 2014 October 19

2014-10-19 14:24:04 UTC: Rio Dell, California USA EARTHQUAKE

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Magnitude: 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

    1. 2014-10-19 14:24:04 UTC

    1. 2014-10-19 07:24:04 UTC-07:00 at epicenter

                              Earthquake data:

                              Location : Position of Epicenter 

                              40.278°N 124.361°W

                              Depth : Depth of starting Rupture 

                              22.4km (13.9mi)

                              Region : Rio Dell, California
                              Magnitude 4.2 Earthquake of Rio Dell, California USA 2014 October 19

                              Directions and Distances :Directions and Distances from Geographical Reference in Close Proximity Which can be effected by Location Uncertainty

                              a) 32km (20mi) SW of Rio Dell, California

                              b) 39km (24mi) SSW of Fortuna, California

                              c) 60km (37mi) SSW of Eureka, California

                              67km (42mi) SSW of Bayside, California

                              e) 310km (193mi) NW of Sacramento, California

                              Location Uncertainty: 
                              4.2 mw
                              ± 0.13
                              40.278°N, 124.361°W
                              ± 1.5 km
                              22.4 km
                              ± 0.5 km
                              Number of Phase Applied1

                              Minimum Distance2
                              8.2 km (0.07°)

                              Travel Time Residual3
                              0.11 sec

                              Azimuthal Gap4

                              1Number of phase Applied: 
                              In determining location of hypocenter, applied number of observations on P waves and S waves. The greater the more accurate prediction of EQ.

                              2Minimum Distance:
                               Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.

                              3Travel Time Residual:
                               A way of measurement of fit of arrival time observed to arrival time predicted for particular location. The smaller the better fit of data.

                              4Azimuthal Gap: 
                              Expressed in degree; the smaller the smaller the error in horizontal positioning of EQ. Large uncertainty is considered when exceeds 180° (both depth and location)

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