20130515 06:11:55 UTC : Cobb, California USA EARTHQUAKE
earthquake monitor,California earthquake, earthquake realtime
Magnitude: 3.1
Event Time: Time and Date Starting of Earthquake Rupture
20130515 06:11:55 UTC
20130514 23:11:55 UTC07:00 at epicenter
Earthquake data:
Location : Position of Epicenter
38.819°N 122.802°W
38.819°N 122.802°W
Directions and Distances :Directions and Distances from Geographical Reference in Close Proximity Which can be effected by Location Uncertainty
a) 6km (4mi) W of Cobb, California
b) 21km (13mi) SW of Clearlake, California
c) 23km (14mi) NNE of Healdsburg, California
d) 30km (19mi) N of Windsor, California
e) 116km (72mi) WNW of Sacramento, California
d) 30km (19mi) N of Windsor, California
e) 116km (72mi) WNW of Sacramento, California
Location Uncertainty:
Parameter

Value

Uncertainty

Magnitude^{}

3.1 Ml

± 0.20

Location^{}

38.819°N, 122.803°W

± 0.2 km

Depth

3.7 km

± 0.2 km

Number of Phase Applied^{1}

62


Minimum Distance^{2}

1.0 km (0.01°)


Travel Time Residual^{3}

0.06 sec


Azimuthal Gap^{4}

43°

^{1}Number 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.
^{2}Minimum Distance:
Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.
^{3}Travel 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.
^{4}Azimuthal 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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