Thursday, July 18, 2013

Magnitude 4.7 Earthquake of Ishinomaki, Japan 2013 July 18

2013-07-18 17:05:06 UTC : Ishinomaki, Japan EARTHQUAKE

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Magnitude: 4.7


Event Time: Time and Date Starting of Earthquake Rupture 

2013-07-18 17:05:06 UTC

2013-07-19 02:05:06 UTC+09:00 at epicenter


Earthquake data:

Location : Position of Epicenter 

38.545°N 141.534°E

Depth : Depth of starting Rupture 

53.7km (33.4mi)

Region : Ishinomaki, Japan
ishinomaki, japan earthquake 2013 July 18

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

a) 24km (15mi) NE of Ishinomaki, Japan

b) 30km (19mi) ENE of Yamoto, Japan

c) 34km (21mi) E of Wakuya, Japan

d) 
42km (26mi) E of Kogota, Japan

e) 
356km (221mi) NNE of Tokyo, Japan

Location Uncertainty: 
Parameter
Value
Uncertainty
Magnitude
4.7 mb
± 0.12
Location
38.545°N, 141.534°E
± 21.7 km
Depth
53.7 km
± 8.3 km
Number of Phase Applied1
27

Minimum Distance2
368.5 km (3.31°)

Travel Time Residual3
0.48 sec

Azimuthal Gap4
182°

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)

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