Magnitude 4.8 Earthquake of Chirikof Island, Alaska 2014-06-30

2014-06-30 12:49:37 UTC:Chirikof Island, Alaska EARTHQUAKE

Magnitude:4.8

Event Time: Time and Date Starting of Earthquake Rupture 

2014-06-30 12:49:37 UTC
2014-06-30 02:49:37 UTC-10:00 at epicenter

2014-06-30 18:49:37 UTC+06:00 system time

1. 
   

Earthquake data:

Location : Position of Epicenter 

55.237°N 155.636°W

Depth : Depth of starting Rupture 

12.2km (7.6mi)

Region :Chirikof Island, Alaska

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

a) 65km (40mi) S of Chirikof Island, Alaska
b) 745km (463mi) SSW of Anchorage, Alaska

c)782km (486mi) SSW of Knik-Fairview, Alaska
d)1155km (718mi) SSW of Fairbanks, Alaska 
e)1335km (830mi) W of Juneau, Alaska

 

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.8 mb	± 0.13
Location	55.238°N, 155.636°W	--
Depth	12.2 km	± 6.2 km
Number of Phase Applied1	57
Minimum Distance2	65.1 km (0.59°)
Travel Time Residual3	0.83 sec
Azimuthal Gap4	174°

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)