Magnitude 4.4 Earthquake of Muara Siberut, Indonesia 2014-10-12

2014-10-12 10:59:20 UTC : Muara Siberut, Indonesia EARTHQUAKE

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Magnitude: 4.4

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-10-12 10:59:20 UTC
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1. 2014-10-12 17:59:20 UTC+07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

2.105°S 99.213°E

Depth : Depth of starting Rupture

30.9km (19.2mi)

Region : Muara Siberut, Indonesia

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

a)  56km (35mi) S of Muara Siberut, Indonesia

b)  180km (112mi) SW of Padang, Indonesia

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c)  192km (119mi) SSW of Pariaman, Indonesia

d)  216km (134mi) SW of Solok, Indonesia

e)  638km (396mi) SW of Singapore, Singapore

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.4 mb	± 0.16
Location	2.105°S, 99.213°E	--
Depth	30.9 km	± 6.9 km
Number of Phase Applied1	28
Minimum Distance2	337.0 km (3.03°)
Travel Time Residual3	0.86 sec
Azimuthal Gap4	207°

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)