Magnitude 4.7 Earthquake of Ribeira Grande, Portugal 2015-04-30

2015-04-30 06:29:56 (UTC) :West of Ribeira Grande, Portugal

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Magnitude : 4.7

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-30 06:29:56 (UTC)

Earthquake data:

Location : Position of Epicenter 

38.524°N 29.162°W

Depth : Depth of starting Rupture 

10.0 km

Region : Ribeira Grande, Portugal

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

a) 40km (25mi) W of Ribeira Grande, Portugal

b) 170km (106mi) W of Angra do Heroismo, Portugal

c) 318km (198mi) WNW of Ponta Delgada, Portugal

d) 1282km (797mi) NW of Camara de Lobos, Portugal

e) 1740km (1081mi) W of Lisbon, Portugal

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.7 mb	± 0.1
Location	38.524°N 29.162°W	± 3.8 km
Depth	10.0 km	± 1.9
Number of Phase Applied1	78
Minimum Distance2	82.71 km (0.74°)
Travel Time Residual3	0.60 sec
Azimuthal Gap4	91°

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 6.7 Earthquake of Kokopo, Papua New Guinea 2015-04-30

2015-04-30 10:45:05 (UTC) :South-SouthWest of Kokopo, Papua New Guinea

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Magnitude : 6.7

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-30 10:45:05 (UTC)

Earthquake data:

Location : Position of Epicenter 

5.392°S 151.818°E

Depth : Depth of starting Rupture 

48.9 km

Region : Kokopo, Papua New Guinea

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

a) 125km (78mi) SSW of Kokopo, Papua New Guinea

b) 186km (116mi) E of Kimbe, Papua New Guinea

c) 331km (206mi) SSE of Kavieng, Papua New Guinea

d) 421km (262mi) WNW of Arawa, Papua New Guinea

e) 680km (423mi) NE of Port Moresby, Papua New Guinea

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	6.7 mwc	± 0.1
Location	5.392°S 151.818°E	± 6.4 km
Depth	48.9 km	± 4.1
Number of Phase Applied1	171
Minimum Distance2	138.15 km (1.24°)
Travel Time Residual3	0.96 sec
Azimuthal Gap4	15°

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 Carson, California 2015-04-30

2015-04-30 14:01:15 (UTC) :North-East of Carson, California

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Magnitude : 3.4

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-30 14:01:15 (UTC)

Earthquake data:

Location : Position of Epicenter 

33.853°N 118.249°W

Depth : Depth of starting Rupture 

14.6 km

Region : Carson, California

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

a) 4km (2mi) NE of Carson, California

b) 5km (3mi) SSW of Compton, California

c) 7km (4mi) SE of Gardena, California

d) 7km (4mi) S of Willowbrook, California

e) 9km (6mi) ENE of Torrance, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.4 ml	± 0.1
Location	33.853°N 118.249°W	± 0.2 km
Depth	14.6 km	± 0.3
Number of Phase Applied1	240
Minimum Distance2	2.64 km (0.02°)
Travel Time Residual3	0.32 sec
Azimuthal Gap4	53°

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 4.1 Earthquake of Perry, Oklahoma 2015-04-29

2015-04-29 16:42:26 (UTC) :West of Perry, Oklahoma

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Magnitude : 4.1

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-29 16:42:26 (UTC)

Earthquake data:

Location : Position of Epicenter 

36.289°N 97.527°W

Depth : Depth of starting Rupture 

2.2 km

Region : West of Perry, Oklahoma

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

a) 21km (13mi) W of Perry, Oklahoma

b) 33km (21mi) ESE of Enid, Oklahoma

c) 46km (29mi) WNW of Stillwater, Oklahoma

d) 46km (29mi) NNW of Guthrie, Oklahoma

e) 91km (57mi) N of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.1 mb_lg	± 0.0
Location	36.289°N 97.527°W	± 1.1 km
Depth	2.2 km	± 7.9
Number of Phase Applied1	38
Minimum Distance2	47.42 km (0.43°)
Travel Time Residual3	0.22 sec
Azimuthal Gap4	61°

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 5.0 Earthquake of Puerto El Triunfo, El Salvador 2015-04-29

2015-04-29 11:22:42 (UTC) :South-SouthWest of Puerto El Triunfo, El Salvador

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Magnitude : 5.0

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-29 11:22:42 (UTC)

Earthquake data:

Location : Position of Epicenter 

11.912°N 88.927°W

Depth : Depth of starting Rupture 

31.4 km

Region : Puerto El Triunfo, El Salvador

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

a) 157km (98mi) SSW of Puerto El Triunfo, El Salvador

b) 167km (104mi) SSW of Usulutan, El Salvador

c) 174km (108mi) SSW of San Rafael Oriente, El Salvador

d) 175km (109mi) S of Zacatecoluca, El Salvador

e) 198km (123mi) S of San Salvador, El Salvador

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.0 mb	± 0.0
Location	11.912°N 88.927°W	± 5.2 km
Depth	31.4 km	± 5.2
Number of Phase Applied1	95
Minimum Distance2	199.15 km (1.79°)
Travel Time Residual3	1.05 sec
Azimuthal Gap4	116°

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)