Magnitude 4.3 Earthquake of Chichi-shima, Japan 2014-09-13

2014-09-13 10:11:50 UTC :Chichi-shima, Japan EARTHQUAKE

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Magnitude : 4.3

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-13 10:11:50 UTC
2. 
   

1. 2014-09-13 19:11:50 UTC+09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

27.592°N 139.997°E

Depth : Depth of starting Rupture 

492.4km (306.0mi)

Region : Chichi-shima, Japan

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

a) 226km (140mi) WNW of Chichi-shima, Japan

b) 781km (485mi) SSE of Shingu, Japan

c) 790km (491mi) S of Shimoda, Japan

d) 795km (494mi) SSE of Oyama, Japan

e) 898km (558mi) S of Tokyo, Japan

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.3 mb	± 0.07
Location	27.592°N, 139.997°E	--
Depth	492.5 km	± 8.1 km
Number of Phase Applied1	85
Minimum Distance2	223.4 km (2.01°)
Travel Time Residual3	0.87 sec
Azimuthal Gap4	64°

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)