Magnitude 4.1 Earthquake Off the coast of Oregon USA 2013 May 25

2013-05-25 11:50:55 UTC : Off the coast of Oregon USA EARTHQUAKE

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Magnitude: 4.1

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-25 11:50:55 UTC

2013-05-25 02:50:55 UTC-09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

44.468°N 129.682°W

Depth : Depth of starting Rupture 

10.0km (6.2mi)

Region : Off the coast of Oregon

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

a) 446km (277mi) W of Waldport, Oregon

b) 455km (283mi) WNW of Coos Bay, Oregon

c) 506km (314mi) W of Dallas, Oregon

d) 510km (317mi) W of Corvallis, Oregon

e) 529km (329mi) W of Salem, Oregon

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.1 mb	± 0.07
Location	44.469°N, 129.682°W	± 26.1 km
Depth	10.0 km	± 3.0 km
Number of Phase Applied1	51
Minimum Distance2	466.4 km (4.19°)
Travel Time Residual3	0.57 sec
Azimuthal Gap4	190°

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)