Magnitude 4.2 Earthquake of Bagalangit, Philippines 2014-09-01

2014-09-01 16:27:31 UTC : Bagalangit, Philippines EARTHQUAKE

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Magnitude: 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-01 16:27:31 UTC
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1. 2014-09-02 00:27:31 UTC+08:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

13.710°N 120.750°E

Depth : Depth of starting Rupture 

182.3km (113.3mi)

Region : Bagalangit, Philippines

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

a)  13km (8mi) W of Bagalangit, Philippines

b)  18km (11mi) SE of Calatagan, Philippines

c)  25km (16mi) S of Balayan, Philippines

d)  25km (16mi) SSW of Calaca, Philippines

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e)  102km (63mi) SSW of Manila, Philippines

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.2 mb	± 0.11
Location	13.710°N, 120.750°E	--
Depth	182.3 km	± 8.6 km
Number of Phase Applied1	38
Minimum Distance2	975.6 km (8.76°)
Travel Time Residual3	0.69 sec
Azimuthal Gap4	103°

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)