Magnitude 4.8 Earthquake of Neiafu, Tonga 2014-09-06

2014-09-06 20:41:50 UTC : Neiafu, Tonga EARTHQUAKE

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Magnitude : 4.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-06 20:41:50 UTC

1. 2014-09-06 08:41:50 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

18.009°S 172.567°W

Depth : Depth of starting Rupture 

21.8km (13.5mi)

Region : Neiafu, Tonga

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

a)  165km (103mi) ENE of Neiafu, Tonga

b)  442km (275mi) NE of Nuku`alofa, Tonga

c)  451km (280mi) SSW of Tafuna, American Samoa

1. 
   

d)  458km (285mi) SSW of Pago Pago, American Samoa

e)  469km (291mi) S of Apia, Samoa

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.8 mb	± 0.06
Location	18.009°S, 172.568°W	--
Depth	21.8 km	± 5.1 km
Number of Phase Applied1	70
Minimum Distance2	302.8 km (2.72°)
Travel Time Residual3	0.91 sec
Azimuthal Gap4	58°

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 4.8 Earthquake of Nuku`alofa, Tonga 2014-09-04

2014-09-04 17:10:57 UTC : Nuku`alofa, Tonga EARTHQUAKE

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Magnitude: 4.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-04 17:10:57 UTC

1. 2014-09-04 05:10:57 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

20.681°S 175.710°W

Depth : Depth of starting Rupture 

47.8km (29.7mi)

Region : Nuku`alofa, Tonga

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

a)  72km (45mi) NW of Nuku`alofa, Tonga

b)  675km (419mi) ESE of Suva, Fiji

c)  700km (435mi) SE of Lambasa, Fiji

1. 
   

d)  789km (490mi) ESE of Nadi, Fiji

e)  865km (537mi) SSW of Apia, Samoa

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.8 mb	± 0.06
Location	20.681°S, 175.710°W	--
Depth	47.8 km	± 6.7 km
Number of Phase Applied1	89
Minimum Distance2	631.3 km (5.67°)
Travel Time Residual3	0.83 sec
Azimuthal Gap4	56°

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 6.0 Earthquake of Ohonua, Tonga 2014-09-04

2014-09-04 05:33:46 UTC : Ohonua, Tonga EARTHQUAKE

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Magnitude : 6.0

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-04 05:33:46 UTC

1. 2014-09-03 17:33:46 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

21.396°S 173.258°W 

Depth : Depth of starting Rupture 

11.8km (7.4mi)

Region : Ohonua, Tonga

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

a)  175km (109mi) E of `Ohonua, Tonga

b)  203km (126mi) E of Nuku`alofa, Tonga

c)  826km (513mi) SSW of Tafuna, American Samoa

1. 
   

d)  833km (518mi) SSW of Pago Pago, American Samoa

e)  851km (529mi) S of Apia, Samoa

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	6.0 mwb	± 0.07
Location	21.397°S, 173.258°W	--
Depth	11.8 km	± 3.9 km
Number of Phase Applied1	93
Minimum Distance2	432.6 km (3.89°)
Travel Time Residual3	1.38 sec
Azimuthal Gap4	28°

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 5.7 Earthquake of Hihifo, Tonga 2014-09-03

2014-09-03 07:43:31 UTC : Hihifo, Tonga EARTHQUAKE

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Magnitude: 5.7

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-03 07:43:31 UTC

1. 2014-09-02 19:43:31 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

15.006°S 173.514°W

Depth : Depth of starting Rupture 

10.0km (6.2mi)

Region : Hihifo, Tonga

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

a)  107km (66mi) NNE of Hihifo, Tonga

b)  228km (142mi) SW of Apia, Samoa

c)  309km (192mi) WSW of Tafuna, American Samoa

1. 
   

d)  313km (194mi) WSW of Pago Pago, American Samoa

e)  701km (436mi) NNE of Nuku`alofa, Tonga

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.7 mb	± 0.03
Location	15.006°S, 173.514°W	--
Depth	10.0 km	± 1.8 km
Number of Phase Applied1	83
Minimum Distance2	590.5 km (5.31°)
Travel Time Residual3	1.60 sec
Azimuthal Gap4	23°

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 Hihifo, Tonga 2014-09-03

2014-09-03 11:34:39 UTC : Hihifo, Tonga EARTHQUAKE

earthquake monitor,Tonga earthquake, earthquake realtime

Magnitude: 5.0

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-03 11:34:39 UTC

1. 2014-09-02 23:34:39 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

14.864°S 173.514°W

Depth : Depth of starting Rupture 

10.0km (6.2mi)

Region : Hihifo, Tonga

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

a)  122km (76mi) NNE of Hihifo, Tonga

b)  220km (137mi) WSW of Apia, Samoa

c)  306km (190mi) WSW of Tafuna, American Samoa

1. 
   

d)  309km (192mi) WSW of Pago Pago, American Samoa

e)  716km (445mi) NNE of Nuku`alofa, Tonga

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.0 mb	± 0.04
Location	14.864°S, 173.514°W	--
Depth	10.0 km	± 1.8 km
Number of Phase Applied1	49
Minimum Distance2	956.0 km (8.59°)
Travel Time Residual3	1.22 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)