Magnitude 2.7 Earthquake of Heber Springs, Arkansas USA 2013 July 03

2013-07-03 02:12:49 UTC : Heber Springs, Arkansas USA EARTHQUAKE

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Magnitude: 2.7

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-07-03 02:12:49 UTC

1. 2013-07-02 21:12:49 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.460°N 92.214°W

Depth : Depth of starting Rupture 

0.1km (0.1mi)

Region : Heber Springs, Arkansas

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

a) 16km (10mi) WSW of Heber Springs, Arkansas

b) 46km (29mi) NNE of Conway, Arkansas

c) 49km (30mi) WNW of Searcy, Arkansas

d) 56km (35mi) NNW of Cabot, Arkansas

e) 79km (49mi) N of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.7 Md	± 0.20
Location	35.460°N, 92.214°W	± 1.1 km
Depth	0.1 km	± 2.9 km
Number of Phase Applied1	18
Minimum Distance2	20.0 km (0.18°)
Travel Time Residual3	0.25 sec
Azimuthal Gap4	76°

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 2.8 Earthquake of Greenbrier, Arkansas USA 2013 June 13

2013-06-13 06:18:04 UTC : Greenbrier, Arkansas USA EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-06-13 06:18:04 UTC

1. 2013-06-13 01:18:04 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.411°N 92.405°W

Depth : Depth of starting Rupture 

0.1km (0.1mi)

Region : Greenbrier, Arkansas

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

a) 18km (11mi) NNW of Greenbrier, Arkansas

b) 34km (21mi) N of Conway, Arkansas

c) 58km (36mi) N of Maumelle, Arkansas

d) 60km (37mi) NW of Cabot, Arkansas

e) 73km (45mi) N of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 MbLg	± 0.20
Location	35.411°N, 92.405°W	± 0.8 km
Depth	0.1 km	± 2.6 km
Number of Phase Applied1	19
Minimum Distance2	15.0 km (0.13°)
Travel Time Residual3	0.28 sec
Azimuthal Gap4	83°

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 3.4 Earthquake of Morrilton, Arkansas USA 2013 May 24

2013-05-24 05:44:24 UTC : Morrilton, Arkansas USA EARTHQUAKE

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Magnitude: 3.4

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-24 05:44:24 UTC

2013-05-24 00:44:24 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.298°N 92.715°W

Depth : Depth of starting Rupture 

5.7km (3.5mi)

Region : Morrilton, Arkansas

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

a) 16km (10mi) N of Morrilton, Arkansas

b) 33km (21mi) NW of Conway, Arkansas

c) 38km (24mi) E of Russellville, Arkansas

d) 55km (34mi) NNW of Maumelle, Arkansas

e) 72km (45mi) NNW of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.4 Mw	± 0.20
Location	35.298°N, 92.715°W	± 1.0 km
Depth	5.7 km	± 2.0 km
Number of Phase Applied1	22
Minimum Distance2	17.0 km (0.15°)
Travel Time Residual3	0.25 sec
Azimuthal Gap4	50°

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 2.8 Earthquake of Trumann, Arkansas USA 2013 May 14

2013-05-14 05:20:21 UTC : Trumann, Arkansas USA EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-14 05:20:21 UTC

2013-05-14 00:20:21 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.620°N 90.550°W

Depth : Depth of starting Rupture 

9.9km (6.2mi)

Region : Trumann, Arkansas

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

a) 7km (4mi) SSW of Trumann, Arkansas

b) 28km (17mi) SSE of Jonesboro, Arkansas

c) 48km (30mi) S of Paragould, Arkansas

d) 55km (34mi) NW of Marion, Arkansas

e) 185km (115mi) ENE of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 Md	± 0.20
Location	35.620°N, 90.550°W	± 0.3 km
Depth	9.9 km	± 1.3 km
Number of Phase Applied1	20
Minimum Distance2	9.0 km (0.08°)
Travel Time Residual3	0.07 sec
Azimuthal Gap4	76°

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 2.5 Earthquake of SOUTHERN CALIFORNIA USA 2013 April 03

2013 April 03 13:31:55 UTC : SOUTHERN CALIFORNIA USA EARTHQUAKE

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Magnitude: 2.5

Date-Time: Wednesday, April 03, 2013 at 13:31:55 UTC

Wednesday, April 03, 2013 at 06:31:55 AM at epicenter

Earthquake data:

Location : 33.807°N, 116.096°W

Depth : 2.5 km (1.6 miles)

Region : SOUTHERN CALIFORNIA

Distances:

a) 16 km (10 miles) NE (52°) from Indio, CA

b) 24 km (15 miles) NE (52°) from La Quinta, CA

c) 37 km (23 miles) S (183°) from Twentynine Palms, CA

d) 150 km (93 miles) NE (40°) from San Diego, CA

Location Uncertainty: horizontal +/- 0.2 km (0.1 miles); depth +/- 0.6 km (0.4 miles)

Parameters: NST= 76, Nph=111, Dmin=12 km, Rmss=0.22 sec, Gp= 40°, M-type=local magnitude (ML), Version=2