Magnitude 4.6 Earthquake of Parapat, Indonesia 2014-08-08

2014-08-08 16:57:01 UTC : Parapat, Indonesia EARTHQUAKE

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Magnitude: 4.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-08-08 16:57:01 UTC
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1. 2014-08-08 23:57:01 UTC+07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

2.438°N 99.051°E

Depth : Depth of starting Rupture 

152.4km (94.7mi)

Region : Parapat, Indonesia

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

a)  28km (17mi) SSE of Parapat, Indonesia

b)  57km (35mi) S of Pematangsiantar, Indonesia

c)  82km (51mi) NNE of Sibolga, Indonesia

d)  87km (54mi) SW of Kisaran, Indonesia

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e)  303km (188mi) WSW of Kuala Lumpur, Malaysia

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.6 mb	± 0.13
Location	2.438°N, 99.051°E	--
Depth	152.4 km	± 2.9 km
Number of Phase Applied1	37
Minimum Distance2	31.6 km (0.28°)
Travel Time Residual3	0.81 sec
Azimuthal Gap4	90°

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)