Magnitude 2.9 Earthquake of El Segundo, California USA 2013 May 09

2013-05-09 21:08:03 UTC : El Segundo, California USA EARTHQUAKE

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Magnitude: 2.9

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-09 21:08:03 UTC

2013-05-09 14:08:03 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

33.959°N 118.415°W

Depth : Depth of starting Rupture 

12.0km (7.5mi)

Region : El Segundo, California

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

a) 4km (2mi) N of El Segundo, California

b) 5km (3mi) W of Inglewood, California

c) 6km (4mi) WNW of Lennox, California

d) 6km (4mi) WNW of Lennox, California

e) 582km (362mi) SSE of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.9 Ml	± 0.20
Location	33.960°N, 118.416°W	± 0.2 km
Depth	12.0 km	± 0.4 km
Number of Phase Applied1	141
Minimum Distance2	2.0 km (0.02°)
Travel Time Residual3	0.24 sec
Azimuthal Gap4	47°

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 1800 (both depth and location)