Magnitude 4.5 Earthquake of Miyako, Japan 2014-09-18

2014-09-18 12:39:07 UTC :Miyako, Japan EARTHQUAKE

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Magnitude : 4.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-18 12:39:07 UTC
2. 
   

1. 2014-09-18 22:39:07 UTC+10:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

39.533°N 143.558°E

Depth : Depth of starting Rupture 

15.3km (9.5mi)

Region : Miyako, Japan

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

a) 138km (86mi) E of Miyako, Japan

b) 138km (86mi) E of Yamada, Japan

c) 143km (89mi) E of Otsuchi, Japan

d) 147km (91mi) ENE of Kamaishi, Japan

e) 546km (339mi) NE of Tokyo, Japan

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.5 mb	± 0.12
Location	39.533°N, 143.558°E	--
Depth	15.3 km	± 5.3 km
Number of Phase Applied1	39
Minimum Distance2	278.1 km (2.50°)
Travel Time Residual3	0.81 sec
Azimuthal Gap4	135°

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)