Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 31-10-2016 and time 19:48:56 (Italy) in region 6 km SE Norcia (PG)

A magnitude ML 2.3 earthquake occured in region: 6 km SE Norcia (PG), on

  • 31-10-2016 18:48:56 (UTC)
  • 31-10-2016 19:48:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7620, 13.1570 at 10 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 6 4957 4957
Accumoli RI 11 667 5624
Arquata del Tronto AP 12 1178 6802
Cascia PG 13 3217 10019
Castelsantangelo sul Nera MC 15 281 10300
Cittareale RI 16 482 10782
Preci PG 16 724 11506
Montegallo AP 17 523 12029
Amatrice RI 18 2657 14686
Poggiodomo PG 19 117 14803
Visso MC 20 1107 15910

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SE of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km W of Pescara (121014 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km W of Chieti (51815 inhabitants)
100 Km SW of Ancona (100861 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 2.3 2016-10-31
18:48:56		 42.7615 13.1568 10 2019-02-12
14:03:15		 Bollettino Sismico Italiano INGV 45423301
Reviewed
Rev100 		ML 2.2 2016-10-31
18:48:56		 42.7642 13.1538 10 2016-10-31
19:05:36		 Sala Sismica INGV-Roma 31313781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 18:48:56 ± 0.05
Latitude 42.7615 ± 0.0027
Longitude 13.1568 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 45423301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 283
Semi-minor axis of confidence ellipse (meter) 256
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 213
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41
Number of associated phases, regardless of their use for origin computation 62
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.97127
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 45423301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-05-17 10:18:11

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 31313781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-31 19:05:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2016-10-31T18:49:29.99 3.0 undecidable manual S -0.41 0
IV.FSSB.HHZ. 2016-10-31T18:49:28.77 0.3 undecidable manual S 344 107.8143 50 0.48 58
IV.PIEI.HHZ. 2016-10-31T18:49:28.99 3.0 undecidable manual S -0.19 0
IV.PTRJ.HHZ. 2016-10-31T18:49:27.48 3.0 undecidable manual Pn 1.6 0
IV.MPAG.EHZ. 2016-10-31T18:49:26.90 0.3 undecidable manual S 342 101.5206 50 0.29 61
IV.MURB.HHZ. 2016-10-31T18:49:20.23 0.3 undecidable manual S 318 75.6687 50 0.51 61
IV.T0110.HHZ. 2016-10-31T18:49:19.59 0.3 undecidable manual S 139 77.7666 50 -0.68 57
IV.FSSB.HHZ. 2016-10-31T18:49:15.86 0.1 undecidable manual P 344 107.8143 50 0.86 67
IV.ATCC.EHZ. 2016-10-31T18:49:15.44 0.3 undecidable manual S 318 62.9925 50 -0.9 54
IV.EL6.EHZ. 2016-10-31T18:49:15.98 0.3 undecidable manual S 356 63.1923 50 -0.4 64
IV.SNTG.HHZ. 2016-10-31T18:49:14.87 0.1 undecidable manual S 342 57.498 50 0 94
IV.MPAG.EHZ. 2016-10-31T18:49:14.68 0.1 undecidable manual P 342 101.5206 50 0.66 73
IV.ASSB.HHZ. 2016-10-31T18:49:13.65 0.1 undecidable manual S 308 51.1155 50 0.49 86
IV.GIGS.HHZ. 2016-10-31T18:49:12.49 0.1 undecidable manual S 135 48.2184 50 0.11 94
IV.CESX.HHZ. 2016-10-31T18:49:12.99 3.0 undecidable manual S -0.32 0
IV.ATTE.HHZ. 2016-10-31T18:49:11.16 3.0 positive manual P -0.14 0
IV.MURB.HHZ. 2016-10-31T18:49:10.54 0.1 undecidable manual P 318 75.6687 50 0.49 82
IV.ARRO.EHZ. 2016-10-31T18:49:10.10 0.3 undecidable manual S 238 37.7289 50 0.5 66
IV.T0110.HHZ. 2016-10-31T18:49:10.29 0.1 undecidable manual P 139 77.7666 50 -0.08 89
IV.TERO.HHZ. 2016-10-31T18:49:10.02 0.1 undecidable manual S 113 39.5271 50 -0.05 96
IV.GUMA.HHZ. 2016-10-31T18:49:09.67 0.1 undecidable manual S 23 36.4413 50 0.44 90
IV.EL6.EHZ. 2016-10-31T18:49:08.10 0.1 undecidable manual P 356 63.1923 50 -0.01 93
IV.ATCC.EHZ. 2016-10-31T18:49:08.06 0.1 undecidable manual P 318 62.9925 50 -0.03 93
IV.FDMO.HHZ. 2016-10-31T18:49:07.23 0.3 undecidable manual S 350 31.0467 50 -0.57 65
IV.SNTG.HHZ. 2016-10-31T18:49:07.18 0.1 undecidable manual P 342 57.498 50 -0.06 93
XO.AM05.EHZ. 2016-10-31T18:49:07.24 0.1 undecidable manual S 34 28.749 50 0.05 98
IV.T1256.HHZ. 2016-10-31T18:49:06.61 0.1 undecidable manual S 12 27.75 50 -0.31 93
IV.RM33.EHZ. 2016-10-31T18:49:06.98 0.1 undecidable manual S 170 28.3494 50 -0.12 97
IV.ASSB.HHZ. 2016-10-31T18:49:06.00 0.1 undecidable manual P 308 51.1155 50 -0.26 91
IV.OFFI.HHZ. 2016-10-31T18:49:06.32 0.1 undecidable manual P 66 47.1195 50 0.68 81
IV.T1241.EHZ. 2016-10-31T18:49:05.74 0.1 undecidable manual S 65 24.6531 112 -0.34 93
IV.GIGS.HHZ. 2016-10-31T18:49:05.51 0.1 undecidable manual P 135 48.2184 50 -0.3 90
IV.T1243.HHZ. 2016-10-31T18:49:05.59 0.1 undecidable manual S 107 24.8529 112 -0.54 89
IV.T1215.HNZ. 2016-10-31T18:49:05.43 0.1 undecidable manual S 281 23.8539 113 -0.41 92
IV.MMO1.HNZ. 2016-10-31T18:49:04.76 0.1 undecidable manual S 42 20.6682 116 -0.04 100
IV.TERO.HHZ. 2016-10-31T18:49:04.17 0.1 undecidable manual P 113 39.5271 50 -0.31 91
IV.T1299.HNZ. 2016-10-31T18:49:04.03 0.1 undecidable manual S 144 17.4714 120 0.21 97
IV.SMA1.EHZ. 2016-10-31T18:49:04.69 0.1 undecidable manual S 135 20.5683 116 -0.09 99
IV.T1217.EHZ. 2016-10-31T18:49:04.27 0.1 undecidable manual S 253 19.1697 118 -0.08 99
IV.LNSS.HHZ. 2016-10-31T18:49:04.75 0.1 undecidable manual S 208 19.9689 117 0.14 98
IV.GUMA.HHZ. 2016-10-31T18:49:04.16 0.1 undecidable manual P 23 36.4413 50 0.16 95
IV.T1216.EHZ. 2016-10-31T18:49:03.78 0.1 undecidable manual S 322 18.1707 119 -0.27 96
IV.T1201.HNZ. 2016-10-31T18:49:03.37 0.1 undecidable manual S 146 13.875 126 0.58 89
IV.ARRO.EHZ. 2016-10-31T18:49:03.87 0.1 undecidable manual P 238 37.7289 50 -0.34 91
IV.T1204.EHZ. 2016-10-31T18:49:03.79 0.1 undecidable manual S 126 16.0728 122 0.36 94
XO.AM05.EHZ. 2016-10-31T18:49:02.73 0.1 undecidable manual P 34 28.749 50 -0.09 98
IV.T1245.HNZ. 2016-10-31T18:49:02.24 0.1 undecidable manual S 13 10.878 133 0.27 97
IV.T1241.EHZ. 2016-10-31T18:49:02.08 0.1 undecidable manual P 65 24.6531 112 -0.1 98
IV.FDMO.HHZ. 2016-10-31T18:49:02.97 0.1 undecidable manual P 350 31.0467 50 -0.2 95
IV.T1256.HHZ. 2016-10-31T18:49:02.44 0.1 undecidable manual P 12 27.75 50 -0.22 95
IV.RM33.EHZ. 2016-10-31T18:49:02.62 0.1 undecidable manual P 170 28.3494 50 -0.14 97
IV.LNSS.HHZ. 2016-10-31T18:49:01.13 0.1 undecidable manual P 208 19.9689 117 -0.19 97
IV.T1215.HNZ. 2016-10-31T18:49:01.79 0.1 undecidable manual P 281 23.8539 113 -0.24 95
IV.MMO1.HNZ. 2016-10-31T18:49:01.31 0.1 undecidable manual P 42 20.6682 116 -0.12 98
IV.T1299.HNZ. 2016-10-31T18:49:01.03 0.1 undecidable manual P 144 17.4714 120 0.16 98
IV.SMA1.EHZ. 2016-10-31T18:49:01.35 0.1 undecidable manual P 135 20.5683 116 -0.07 99
IV.T1217.EHZ. 2016-10-31T18:49:01.06 0.1 undecidable manual P 253 19.1697 118 -0.12 99
IV.T1243.HHZ. 2016-10-31T18:49:01.92 0.1 undecidable manual P 107 24.8529 112 -0.28 94
IV.T1204.EHZ. 2016-10-31T18:49:00.83 0.1 negative manual P 126 16.0728 122 0.19 98
IV.T1216.EHZ. 2016-10-31T18:49:00.89 0.1 undecidable manual P 322 18.1707 119 -0.11 99
IV.T1245.HNZ. 2016-10-31T18:49:00.02 0.1 undecidable manual P 13 10.878 133 0.22 98
IV.T1201.HNZ. 2016-10-31T18:49:00.66 0.1 undecidable manual P 146 13.875 126 0.39 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
XO.AM05.HNN. ML:2.0 0.000584 0.64 AML other m 2016-10-31T18:49:08.51
XO.AM05.HNE. ML:2.1 0.000668 0.12 AML other m 2016-10-31T18:49:08.33
XO.AM05.EHE. ML:2.7 0.0027800000000000004 0.1 AML other m 2016-10-31T18:49:08.33
XO.AM05.EHN. ML:1.6 0.0002035 0.08 AML other m 2016-10-31T18:49:08.48
IV.ARRO.EHN. ML:1.9 0.0003175 0.58 AML other m 2016-10-31T18:49:11.65
IV.ARRO.EHE. ML:1.9 0.0003179999999999999 0.22 AML other m 2016-10-31T18:49:13.74
IV.ASSB.HHE. ML:2.2 0.00035999999999999997 0.22 AML other m 2016-10-31T18:49:14.95
IV.ASSB.HHN. ML:2.1 0.000314 0.18 AML other m 2016-10-31T18:49:15.71
IV.ATCC.EHE. ML:2.3 0.00035299999999999996 0.18 AML other m 2016-10-31T18:49:18.10
IV.ATCC.EHN. ML:2.1 0.0002445 0.22 AML other m 2016-10-31T18:49:18.85
IV.ATTE.HHN. ML:1.7 0.0000724 0.3 AML other m 2016-10-31T18:49:25.48
IV.ATTE.HHE. ML:1.8 0.00007664999999999999 1 AML other m 2016-10-31T18:49:30.64
IV.GIGS.HHN. ML:1.3 0.00006125 0.52 AML other m 2016-10-31T18:49:17.64
IV.GIGS.HHE. ML:1.3 0.00005875 1.3 AML other m 2016-10-31T18:49:21.92
IV.GUMA.HNN. ML:3.1 0.004415 0.32 AML other m 2016-10-31T18:49:10.36
IV.GUMA.HHE. ML:3.1 0.00468 0.32 AML other m 2016-10-31T18:49:10.37
IV.GUMA.HNE. ML:2.8 0.0026550000000000002 0.28 AML other m 2016-10-31T18:49:11.79
IV.GUMA.HHN. ML:2.9 0.00337 0.56 AML other m 2016-10-31T18:49:10.33
IV.LNSS.HHE. ML:1.8 0.000923 1.78 AML other m 2016-10-31T18:49:58.99
IV.OFFI.HHE. ML:2.6 0.001295 0.22 AML other m 2016-10-31T18:49:16.96
IV.OFFI.HHN. ML:3.0 0.003115 0.62 AML other m 2016-10-31T18:49:15.84
IV.RM33.HNN. ML:2.2 0.00078 1.42 AML other m 2016-10-31T18:49:08.12
IV.RM33.EHN. ML:2.2 0.0007650000000000001 1.44 AML other m 2016-10-31T18:49:08.12
IV.SMA1.EHE. ML:2.4 0.0017050000000000001 0.98 AML other m 2016-10-31T18:49:09.92
IV.SMA1.EHN. ML:2.4 0.0017850000000000001 1.58 AML other m 2016-10-31T18:49:09.03
IV.SNTG.HNN. ML:2.3 0.00041049999999999995 0.6 AML other m 2016-10-31T18:49:16.15
IV.SNTG.HHN. ML:2.2 0.0003805 0.6 AML other m 2016-10-31T18:49:16.45
IV.SNTG.HNE. ML:2.2 0.0003815 0.92 AML other m 2016-10-31T18:49:16.61
IV.SNTG.HHE. ML:2.2 0.0003285 0.32 AML other m 2016-10-31T18:49:16.60
IV.T0110.HHE. ML:2.1 0.0001785 0.48 AML other m 2016-10-31T18:49:28.21
IV.T0110.HHN. ML:2.1 0.0001975 0.44 AML other m 2016-10-31T18:49:29.14
IV.T1204.EHE. ML:2.2 0.001402 0.28 AML other m 2016-10-31T18:49:06.90
IV.T1241.EHN. ML:2.5 0.0017 1.54 AML other m 2016-10-31T18:49:06.89
IV.T1241.EHE. ML:2.3 0.00123 0.46 AML other m 2016-10-31T18:49:08.65
IV.T1245.HHN. ML:2.9 0.00987 1.56 AML other m 2016-10-31T18:49:04.89
IV.T1245.HNN. ML:2.9 0.009980000000000001 1.58 AML other m 2016-10-31T18:49:04.11
IV.T1245.HNE. ML:3.1 0.0158 0.2 AML other m 2016-10-31T18:49:02.88
IV.T1256.HHN. ML:2.6 0.0018599999999999999 0.46 AML other m 2016-10-31T18:49:07.03
IV.T1256.HHE. ML:2.5 0.00183 0.4 AML other m 2016-10-31T18:49:07.75
IV.TERO.HHN. ML:2.2 0.0006115 0.54 AML other m 2016-10-31T18:49:12.68
IV.TERO.HHE. ML:2.0 0.00033499999999999996 0.48 AML other m 2016-10-31T18:49:13.42
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
Waveforms Seismic signals in miniseed + resp format Download