Magnitude 3.3 Earthquake of Rancho Palos Verdes, California USA 2013 May 18

2013-05-18 09:41:02 UTC : Rancho Palos Verdes, California USA EARTHQUAKE

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Magnitude: 3.3

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-18 09:41:02 UTC

2013-05-18 02:41:02 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

33.556°N 118.371°W

Depth : Depth of starting Rupture 

0.0km (0.0mi)

Region : Rancho Palos Verdes, California

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

a) 20km (12mi) S of Rancho Palos Verdes, California

b) 21km (13mi) SSW of San Pedro, California

c) 26km (16mi) S of Lomita, California

d) 27km (17mi) S of Palos Verdes Estates, California

e) 585km (364mi) W of Phoenix, Arizona

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.3 Ml	± 0.20
Location	33.556°N, 118.371°W	± 0.5 km
Depth	0.0 km	± 1.1 km
Number of Phase Applied1	103
Minimum Distance2	18.0 km (0.16°)
Travel Time Residual3	0.53 sec
Azimuthal Gap4	101°

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)