Magnitude 4.6 Earthquake of Sabtang, Philippines 2014-07-26

2014-07-26 08:40:05 UTC : Sabtang, Philippines EARTHQUAKE

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Magnitude: 4.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-26 08:40:05 UTC
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1. 2014-07-26 16:40:05 UTC+08:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

20.297°N 120.267°E

Depth : Depth of starting Rupture 

18.6km (11.6mi)

Region : Sabtang, Philippines

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

a) 167km (104mi) W of Sabtang, Philippines

b) 195km (121mi) SSW of Hengchun, Taiwan

c) 205km (127mi) NNW of Claveria, Philippines

d) 234km (145mi) N of Laoag, Philippines

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e) 634km (394mi) N of Manila, Philippines

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.6 mb	± 0.09
Location	20.297°N, 120.267°E	--
Depth	18.7 km	± 5.2 km
Number of Phase Applied1	58
Minimum Distance2	291.5 km (2.62°)
Travel Time Residual3	0.84 sec
Azimuthal Gap4	126°

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)