Magnitude 4.8 Earthquake of Katsuura, Japan 2014-08-12

2014-08-12 00:47:21 UTC :Katsuura, Japan EARTHQUAKE

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Magnitude: 4.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-08-12 00:47:21 UTC
2. 
   

1. 2014-08-12 09:47:21 UTC+09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

34.284°N 140.502°E

Depth : Depth of starting Rupture 

83.9km (52.1mi)

Region : Katsuura, Japan

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

a) 95km (59mi) S of Katsuura, Japan

b) 97km (60mi) SE of Tateyama, Japan

c) 97km (60mi) SSE of Kawaguchi, Japan

d) 107km (66mi) S of Ohara, Japan

e) 172km (107mi) SSE of Tokyo, Japan

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.8 mb	± 0.09
Location	34.284°N, 140.502°E	--
Depth	83.9 km	± 7.5 km
Number of Phase Applied1	55
Minimum Distance2	144.6 km (1.30°)
Travel Time Residual3	0.87 sec
Azimuthal Gap4	65°

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)