Magnitude 4.2 Earthquake of Spanish Springs, Nevada USA 2013 August 27

2013-08-27 00:51:43 UTC : Spanish Springs, Nevada USA EARTHQUAKE

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Magnitude: 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-08-27 00:51:43 UTC

1. 2013-08-26 17:51:43 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

39.669°N 119.684°W

Depth : Depth of starting Rupture 

13.9km (8.7mi)

Region : Spanish Springs, Nevada

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

a) 3km (2mi) NE of Spanish Springs, Nevada

b) 11km (7mi) NE of Sun Valley, Nevada

c) 16km (10mi) NNE of Sparks, Nevada

d) 19km (12mi) NE of Reno, Nevada

e) 56km (35mi) N of Carson City, Nevada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.2 ml	--
Location	39.669°N, 119.684°W	± 0.6 km
Depth	13.9 km	± 0.8 km
Number of Phase Applied1	44
Minimum Distance2	15.3 km (0.14°)
Travel Time Residual3	0.1039 sec
Azimuthal Gap4	74°

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)

Magnitude 4.2 Earthquake of Vandenberg Air Force Base, California USA 2013 August 24

2013-08-24 01:16:31 UTC : Vandenberg Air Force Base, California USA EARTHQUAKE

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Magnitude: 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

2013-08-24 01:16:31 UTC


2013-08-23 17:16:31 UTC-08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

34.574°N 120.917°W

Depth : Depth of starting Rupture 

13.1km (8.1mi)

Region : Vandenberg Air Force Base, California

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

a) 41km (25mi) WSW of Vandenberg Air Force Base, California

b) 42km (26mi) W of Lompoc, California

c) 54km (34mi) SW of Orcutt, California

d) 60km (37mi) SW of Santa Maria, California

e) 447km (278mi) S of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.2 Ml	± 0.20
Location	34.574°N, 120.917°W	± 2.3 km
Depth	13.1 km	± 1.7 km
Number of Phase Applied1	24
Minimum Distance2	31.0 km (0.28°)
Travel Time Residual3	0.24 sec
Azimuthal Gap4	230°

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)

Magnitude 4.4 Earthquake of Atka, Alaska USA 2013 August 20

2013-08-20 06:30:34 UTC : Atka, Alaska USA EARTHQUAKE

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Magnitude: 4.4

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-08-20 06:30:34 UTC

1. 2013-08-19 18:30:34 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

52.658°N 174.465°W

Depth : Depth of starting Rupture 

205.2km (127.5mi)

Region : Atka, Alaska

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

a) 54km (34mi) NNW of Atka, Alaska

b) 1422km (884mi) SSE of Anadyr', Russia

c) 1757km (1092mi) WSW of Anchorage, Alaska

d) 1784km (1109mi) WSW of Knik-Fairview, Alaska

e) 2530km (1572mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.4 mb	± 0.05
Location	52.658°N, 174.466°W	± 20.8 km
Depth	205.2 km	± 6.3 km
Number of Phase Applied1	76
Minimum Distance2	54.5 km (0.49°)
Travel Time Residual3	1.24 sec
Azimuthal Gap4	71°

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)

Magnitude 2.6 Earthquake of Green Valley, California USA 2013 August 20

2013-08-20 08:27:23 UTC : Green Valley, California USA EARTHQUAKE

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Magnitude: 2.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-08-20 08:27:23 UTC

1. 2013-08-20 01:27:23 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

34.722°N 118.555°W

Depth : Depth of starting Rupture 

10.0km (6.2mi)

Region : Green Valley, California

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

a) 17km (11mi) NW of Green Valley, California

b) 26km (16mi) NNE of Castaic, California

c) 32km (20mi) WNW of Quartz Hill, California

d) 36km (22mi) N of Santa Clarita, California

e) 502km (312mi) SSE of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.6 Ml	± 0.20
Location	34.722°N, 118.555°W	± 0.3 km
Depth	10.0 km	± 0.6 km
Number of Phase Applied1	80
Minimum Distance2	5.0 km (0.04°)
Travel Time Residual3	0.25 sec
Azimuthal Gap4	25°

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)