Magnitude 4.7 Earthquake of Qiaozhuang, China 2013 May 15

2013-05-15 12:29:12 UTC : Qiaozhuang, China EARTHQUAKE

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Magnitude: 4.7

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-15 12:29:12 UTC

2013-05-15 20:29:12 UTC+08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

32.586°N 105.195°E

Depth : Depth of starting Rupture 

16.5km (10.3mi)

Region : Qiaozhuang, China

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

a) 3km (2mi) W of Qiaozhuang, China

b) 61km (38mi) WNW of Guangyuan, China

c) 101km (63mi) NNE of Jiangyou, China

d) 131km (81mi) NNE of Mianyang, China

e) 1282km (797mi) N of Ha Noi, Vietnam

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.7 mb	± 0.08
Location	32.586°N, 105.195°E	± 17.4 km
Depth	16.5 km	± 6.3 km
Number of Phase Applied1	55
Minimum Distance2	1254.6 km (11.27°)
Travel Time Residual3	0.95 sec
Azimuthal Gap4	41°

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)