Magnitude 5.8 Earthquake of Hachijo-jima, Japan 2014-10-15

2014-10-15 23:53:00 UTC :Hachijo-jima, Japan EARTHQUAKE

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Magnitude : 5.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-10-15 23:53:00 UTC
2. 
   

1. 2014-10-16 08:53:00 UTC+09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

31.755°N 140.541°E

Depth : Depth of starting Rupture 

49.0km (30.5mi)

Region : Hachijo-jima, Japan

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

a) 162km (101mi) SSE of Hachijo-jima, Japan

b) 355km (221mi) SSE of Shimoda, Japan

c) 363km (226mi) S of Tateyama, Japan

d) 373km (232mi) S of Kawaguchi, Japan

e) 443km (275mi) S of Tokyo, Japan

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.8 mb	± 0.03
Location	31.755°N, 140.541°E	--
Depth	49.0 km	± 5.8 km
Number of Phase Applied1	122
Minimum Distance2	165.8 km (1.49°)
Travel Time Residual3	1.04 sec
Azimuthal Gap4	33°

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)