Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 12-08-2015 and time 06:23:11 (Italy) in region 7 km W Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 7 km W Norcia (PG), on

  • 12-08-2015 04:23:11 (UTC)
  • 12-08-2015 06:23:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8170, 13.0100 at 73 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 7 4957 4957
Preci PG 7 724 5681
Cerreto di Spoleto PG 8 1075 6756
Sellano PG 11 1079 7835
Cascia PG 11 3217 11052
Vallo di Nera PG 13 364 11416
Poggiodomo PG 13 117 11533
Visso MC 14 1107 12640
Castelsantangelo sul Nera MC 15 281 12921
Sant'Anatolia di Narco PG 17 564 13485
Ussita MC 18 444 13929
Scheggino PG 19 461 14390
Monteleone di Spoleto PG 19 599 14989
Campello sul Clitunno PG 19 2442 17431
Monte Cavallo MC 20 145 17576

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
59 Km W of Teramo (54892 inhabitants)
60 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.7 2015-08-12
04:23:11		 42.8168 13.0103 73 2016-01-08
08:46:44		 Bollettino Sismico Italiano INGV 22542851
Reviewed
Rev100 		ML 1.7 2015-08-12
04:23:11		 42.8192 13.0018 73 2015-08-12
04:31:45		 Sala Sismica INGV-Roma 20851351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-08-12 04:23:11 ± 0.15
Latitude 42.8168 ± 0.0063
Longitude 13.0103 ± 0.0098
Depth (km) 73 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 22542851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 832
Semi-minor axis of confidence ellipse (meter) 416
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.11246
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 20851351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-08-12 04:31:45

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 22542851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-12-09 09:00:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2015-08-12T04:24:12.99 3.0 undecidable manual Sg 7.18 0
IV.VITU.HHZ. 2015-08-12T04:24:07.99 3.0 undecidable manual Sn -2.44 0
ST.DOSS.HHZ. 2015-08-12T04:24:00.29 3.0 negative manual Pn -1.53 0
IV.LEOD.HNZ. 2015-08-12T04:23:59.56 3.0 positive manual Pn -2.68 0
IV.MRB1.HHZ. 2015-08-12T04:23:56.66 3.0 negative manual Pg 9.14 0
IV.CAVE.HHZ. 2015-08-12T04:23:55.36 3.0 positive manual Pg 4.71 0
IV.CRE.HHZ. 2015-08-12T04:23:45.72 0.1 undecidable manual S 316 123.4875 112 -0.89 65
IV.FSSB.HHZ. 2015-08-12T04:23:42.51 0.6 undecidable manual S 349 99.0231 118 0.67 37
IV.FRON.EHZ. 2015-08-12T04:23:39.43 0.1 undecidable manual S 344 81.0522 125 0.89 69
IV.MGAB.HHZ. 2015-08-12T04:23:37.76 0.1 undecidable manual S 279 73.7706 128 0.49 84
IV.ATMI.HHZ. 2015-08-12T04:23:37.94 1.0 undecidable manual S 314 83.1501 124 -0.96 17
IV.ARVD.HHZ. 2015-08-12T04:23:37.43 0.6 undecidable manual S 356 75.7686 127 -0.18 45
IV.GIGS.HHN. 2015-08-12T04:23:35.87 0.6 undecidable manual S 131 61.0944 134 0.68 41
IV.FIAM.HHZ. 2015-08-12T04:23:35.81 0.1 undecidable manual S 172 61.494 134 0.56 85
IV.ATTE.HHZ. 2015-08-12T04:23:35.74 0.1 undecidable manual S 309 67.9764 130 -0.56 85
IV.EL6.EHZ. 2015-08-12T04:23:34.64 0.1 undecidable manual S 7 57.2982 136 0.03 95
IV.FOSV.EHZ. 2015-08-12T04:23:34.98 0.3 undecidable manual S 339 56.6988 136 0.46 65
IV.TERO.HHZ. 2015-08-12T04:23:34.03 0.6 undecidable manual S 114 52.9026 138 0.06 48
IV.SNTG.HHZ. 2015-08-12T04:23:33.84 0.1 undecidable manual S 353 48.9177 141 0.43 88
IV.CESX.HHE. 2015-08-12T04:23:32.73 0.6 undecidable manual S 236 41.5251 146 0.27 47
IV.MOMA.HHZ. 2015-08-12T04:23:32.18 0.1 undecidable manual S 267 36.0417 150 0.36 92
IV.RM33.EHZ. 2015-08-12T04:23:31.78 0.1 undecidable manual S 154 38.0286 148 -0.26 95
IV.ASSB.HHZ. 2015-08-12T04:23:31.44 0.1 undecidable manual S 311 38.0286 148 -0.6 89
IV.CRE.HHZ. 2015-08-12T04:23:31.28 0.1 undecidable manual P 316 123.4875 112 -0.37 77
IV.ARRO.EHZ. 2015-08-12T04:23:31.39 0.1 undecidable manual S 217 33.0447 152 -0.12 99
IV.SMA1.EHZ. 2015-08-12T04:23:31.49 0.1 undecidable manual S 128 33.5442 151 -0.08 100
IV.CSP1.EHZ. 2015-08-12T04:23:31.65 0.1 undecidable manual S 27 34.3434 151 0.01 99
IV.CESI.HHZ. 2015-08-12T04:23:30.05 0.3 undecidable manual S 338 22.5552 160 -0.54 70
IV.LNSS.HHZ. 2015-08-12T04:23:30.29 0.1 undecidable manual S 174 23.8539 159 -0.4 95
IV.FDMO.HHZ. 2015-08-12T04:23:30.67 0.3 undecidable manual S 14 25.1526 158 -0.12 76
IV.FSSB.HHZ. 2015-08-12T04:23:28.83 0.1 undecidable manual P 349 99.0231 118 -0.07 87
IV.ATMI.HHZ. 2015-08-12T04:23:27.18 0.3 undecidable manual P 314 83.1501 124 -0.03 68
IV.FRON.EHZ. 2015-08-12T04:23:27.07 0.1 negative manual P 344 81.0522 125 0.08 92
IV.FAGN.HHZ. 2015-08-12T04:23:27.03 0.6 undecidable manual P 142 77.0673 126 0.45 43
IV.ARVD.HHZ. 2015-08-12T04:23:26.20 0.1 undecidable manual P 356 75.7686 127 -0.26 88
IV.MGAB.HHZ. 2015-08-12T04:23:26.70 0.1 positive manual P 279 73.7706 128 0.44 86
IV.GIGS.HHN. 2015-08-12T04:23:25.08 0.3 undecidable manual P 131 61.0944 134 0.02 71
IV.FIAM.HHZ. 2015-08-12T04:23:25.55 0.1 undecidable manual P 172 61.494 134 0.45 89
IV.FOSV.EHZ. 2015-08-12T04:23:25.05 0.3 undecidable manual P 339 56.6988 136 0.37 67
IV.ATTE.HHZ. 2015-08-12T04:23:25.60 0.1 undecidable manual P 309 67.9764 130 -0.1 92
IV.TERO.HHZ. 2015-08-12T04:23:24.41 0.1 undecidable manual P 114 52.9026 138 0.05 97
IV.SNTG.HHZ. 2015-08-12T04:23:24.02 0.1 negative manual P 353 48.9177 141 -0.02 98
IV.EL6.EHZ. 2015-08-12T04:23:24.57 0.1 negative manual P 7 57.2982 136 -0.16 93
IV.ATCC.EHZ. 2015-08-12T04:23:24.10 0.1 undecidable manual P 324 50.7159 140 -0.08 96
IV.MOMA.HHZ. 2015-08-12T04:23:23.16 0.1 undecidable manual P 267 36.0417 150 0.04 100
IV.RM33.EHZ. 2015-08-12T04:23:23.25 0.1 undecidable manual P 154 38.0286 148 0 99
IV.ASSB.HHZ. 2015-08-12T04:23:23.04 0.1 positive manual P 311 38.0286 148 -0.2 96
IV.ARRO.EHZ. 2015-08-12T04:23:23.05 0.1 positive manual P 217 33.0447 152 0.11 99
IV.CESX.HHE. 2015-08-12T04:23:23.66 0.1 undecidable manual P 236 41.5251 146 0.17 97
IV.SMA1.EHZ. 2015-08-12T04:23:23.03 0.3 undecidable manual P 128 33.5442 151 0.06 75
IV.FEMA.HNE. 2015-08-12T04:23:22.27 0.3 undecidable manual P 11 16.4724 165 0.09 77
IV.CSP1.EHZ. 2015-08-12T04:23:22.99 0.1 negative manual P 27 34.3434 151 -0.03 100
IV.CESI.HHZ. 2015-08-12T04:23:22.08 0.1 positive manual P 338 22.5552 160 -0.33 96
IV.LNSS.HHZ. 2015-08-12T04:23:22.19 0.1 positive manual P 174 23.8539 159 -0.27 96
IV.FDMO.HHZ. 2015-08-12T04:23:22.26 0.3 undecidable manual P 14 25.1526 158 -0.26 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1.7 0.0000696 0.24 AML other m 2015-08-12T04:23:32.15
IV.ARRO.EHN. ML:1.6 0.00006205 1.36 AML other m 2015-08-12T04:23:33.04
IV.ARVD.HHN. ML:1.3 0.00001755 1.5 AML other m 2015-08-12T04:23:38.88
IV.ARVD.HHE. ML:1.3 0.000018599999999999998 1 AML other m 2015-08-12T04:23:42.04
IV.ASSB.HHE. ML:2.0 0.00013450000000000002 0.24 AML other m 2015-08-12T04:23:31.80
IV.ASSB.HHN. ML:1.8 0.00007345 0.42 AML other m 2015-08-12T04:23:33.41
IV.ATCC.EHE. ML:1.5 0.00003784999999999999 1.16 AML other m 2015-08-12T04:23:36.77
IV.ATCC.EHN. ML:1.5 0.0000357 0.8 AML other m 2015-08-12T04:23:38.69
IV.ATTE.HHN. ML:1.6 0.00004015 0.24 AML other m 2015-08-12T04:23:36.52
IV.ATTE.HHE. ML:1.5 0.000031 0.26 AML other m 2015-08-12T04:23:37.16
IV.CESI.HHN. ML:1.2 0.0000247 0.16 AML other m 2015-08-12T04:23:33.45
IV.CESI.HHE. ML:0.8 0.000010849999999999998 0.96 AML other m 2015-08-12T04:23:33.39
IV.CSP1.EHN. ML:2.0 0.00013000000000000002 0.72 AML other m 2015-08-12T04:23:33.67
IV.CSP1.EHE. ML:1.8 0.00009499999999999998 0.9 AML other m 2015-08-12T04:23:35.00
IV.FDMO.HHE. ML:1.8 0.00009975 0.5 AML other m 2015-08-12T04:23:32.18
IV.FDMO.HHN. ML:1.8 0.00008319999999999999 0.4 AML other m 2015-08-12T04:23:32.69
IV.FIAM.HHN. ML:1.4 0.000024449999999999998 0.4 AML other m 2015-08-12T04:23:41.16
IV.FIAM.HHE. ML:1.6 0.000041099999999999996 0.5 AML other m 2015-08-12T04:23:37.94
IV.FSSB.HHE. ML:1.7 0.000034750000000000004 0.28 AML other m 2015-08-12T04:23:47.12
IV.FSSB.HHN. ML:1.8 0.00004765 0.32 AML other m 2015-08-12T04:23:48.32
IV.LNSS.HHE. ML:1.8 0.0000896 0.94 AML other m 2015-08-12T04:23:31.85
IV.LNSS.HHN. ML:1.7 0.00007185 0.18 AML other m 2015-08-12T04:23:31.43
IV.MGAB.HHN. ML:2.2 0.00014050000000000003 0.26 AML other m 2015-08-12T04:23:38.25
IV.MGAB.HHE. ML:1.8 0.00005415 1.48 AML other m 2015-08-12T04:23:38.69
IV.MOMA.HHN. ML:1.7 0.00006759999999999999 0.74 AML other m 2015-08-12T04:23:33.85
IV.MOMA.HHE. ML:1.9 0.0001215 0.18 AML other m 2015-08-12T04:23:33.92
IV.RM33.EHN. ML:1.7 0.0000665 0.74 AML other m 2015-08-12T04:23:32.92
IV.RM33.EHE. ML:1.7 0.00006795 1.14 AML other m 2015-08-12T04:23:32.61
IV.SMA1.EHN. ML:1.8 0.0000812 1.2 AML other m 2015-08-12T04:23:32.17
IV.SMA1.EHE. ML:1.8 0.0000844 0.58 AML other m 2015-08-12T04:23:33.21
IV.SNTG.HHE. ML:1.9 0.00008774999999999999 0.12 AML other m 2015-08-12T04:23:34.19
IV.SNTG.HHN. ML:1.7 0.0000628 0.28 AML other m 2015-08-12T04:23:36.41
IV.TERO.HHE. ML:1.2 0.000022100000000000002 0.3 AML other m 2015-08-12T04:23:35.26
IV.TERO.HHN. ML:1.1 0.00001425 0.32 AML other m 2015-08-12T04:23:35.10
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download