20150415 10:14:48 (UTC) :South of Morton, Washington
earthquake monitor,Washington earthquake, earthquake realtime
Magnitude : 2.8
Event Time: Time and Date Starting of Earthquake Rupture
 20150415 10:14:48 (UTC)
Earthquake data:
Location : Position of Epicenter
46.343°N 122.239°W
Depth : Depth of starting Rupture
12.5 km
a) 24km (15mi) S of Morton, Washington
b) 56km (35mi) ENE of Kelso, Washington
c) 58km (36mi) ENE of Longview, Washington
d) 66km (41mi) NNE of Battle Ground, Washington
e) 92km (57mi) SSE of Olympia, Washington
Location Uncertainty:
Parameter

Value

Uncertainty

Magnitude^{}

2.8 ml

± 0.2

Location^{}

46.343°N 122.239°W

± 0.7 km

Depth

12.5 km

± 0.9

Number of Phase Applied^{1}

27
 
Minimum Distance^{2}

1.88 km (0.02°)
 
Travel Time Residual^{3}

0.18 sec
 
Azimuthal Gap^{4}

80°

^{1}Number 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.
^{2}Minimum Distance:
Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.
^{3}Travel 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.
^{4}Azimuthal 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)
No comments:
Post a Comment