Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 31-10-2016 and time 10:59:54 (Italy) in region 8 km E Norcia (PG)

A magnitude ML 2.5 earthquake occured in region: 8 km E Norcia (PG), on

  • 31-10-2016 09:59:54 (UTC)
  • 31-10-2016 10:59:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7810, 13.1910 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 8 4957 4957
Arquata del Tronto AP 9 1178 6135
Accumoli RI 11 667 6802
Castelsantangelo sul Nera MC 13 281 7083
Montegallo AP 14 523 7606
Cascia PG 16 3217 10823
Preci PG 17 724 11547
Montemonaco AP 17 604 12151
Acquasanta Terme AP 18 2916 15067
Cittareale RI 18 482 15549
Amatrice RI 19 2657 18206
Visso MC 19 1107 19313
Ussita MC 19 444 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
44 Km E of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km S of Ancona (100861 inhabitants)
98 Km E of Viterbo (67173 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 2.5 2016-10-31
09:59:54		 42.7813 13.1908 10 2019-02-12
14:03:25		 Bollettino Sismico Italiano INGV 49296861
Reviewed
Rev100 		ML 2.5 2016-10-31
09:59:54		 42.7898 13.1932 12 2016-10-31
10:08:13		 Sala Sismica INGV-Roma 31247911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 09:59:54 ± 0.06
Latitude 42.7813 ± 0.0027
Longitude 13.1908 ± 0.0049
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 49296861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 247
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 56
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.04861
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 49296861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-23 10:49:16

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 31247911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-31 10:08:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2016-10-31T10:00:19.82 0.3 undecidable manual S 346 82.0512 50 0.73 54
IV.CAFI.HHZ. 2016-10-31T10:00:14.66 0.1 undecidable manual P 302 116.3946 50 0.64 70
IV.FSSB.HHZ. 2016-10-31T10:00:13.02 0.3 undecidable manual P 342 106.5156 50 0.52 56
IV.SACS.HHZ. 2016-10-31T10:00:12.88 0.6 undecidable manual P 275 104.5176 50 0.69 35
IV.FIAM.HHZ. 2016-10-31T10:00:12.55 0.3 undecidable manual S 186 57.2982 50 0.08 68
IV.MGAB.HHZ. 2016-10-31T10:00:10.16 0.3 undecidable manual P 280 88.9443 50 0.37 60
IV.MNTP.HNZ. 2016-10-31T10:00:09.84 0.3 undecidable manual S 30 45.5211 50 0.5 63
IV.GIGS.HHZ. 2016-10-31T10:00:09.62 0.3 undecidable manual S 139 47.9187 50 -0.36 65
IV.ARVD.HHZ. 2016-10-31T10:00:08.56 0.3 undecidable manual P 346 82.0512 50 -0.16 64
IV.ARRO.EHZ. 2016-10-31T10:00:08.84 0.6 undecidable manual S 237 41.3253 50 0.63 41
IV.T1211.EHZ. 2016-10-31T10:00:07.70 0.3 undecidable manual S 225 38.8278 50 0.14 70
IV.T0110.HHZ. 2016-10-31T10:00:07.77 0.3 undecidable manual P 142 77.7666 50 -0.29 63
IV.T1247.HHZ. 2016-10-31T10:00:07.46 0.6 undecidable manual S 167 38.7279 50 -0.06 47
IV.VCEL.EHZ. 2016-10-31T10:00:07.05 3.0 undecidable manual P 0.39 0
IV.TERO.HHZ. 2016-10-31T10:00:06.90 0.3 undecidable manual S 117 38.0286 50 -0.43 65
IV.T1220.EHN. 2016-10-31T10:00:06.84 0.6 undecidable manual S 347 37.4292 50 -0.34 45
IV.RM33.HNZ. 2016-10-31T10:00:05.27 0.3 undecidable manual S 176 30.2475 50 0 73
IV.CAMP.HHZ. 2016-10-31T10:00:05.30 0.3 undecidable manual S 147 32.5452 50 -0.57 63
IV.T1246.HHZ. 2016-10-31T10:00:05.72 0.1 undecidable manual S 132 33.0447 50 -0.28 91
IV.CESX.HHZ. 2016-10-31T10:00:04.17 0.1 undecidable manual P 249 52.8027 50 -0.05 92
IV.FDMO.HHN. 2016-10-31T10:00:04.57 0.3 undecidable manual S 343 29.5482 50 -0.5 65
IV.FIAM.HHZ. 2016-10-31T10:00:04.91 0.1 undecidable manual P 186 57.2982 50 0.01 92
IV.LNSS.HHN. 2016-10-31T10:00:03.06 0.3 undecidable manual S 212 23.2545 114 -0.34 68
IV.MNTP.HNZ. 2016-10-31T10:00:03.78 0.1 undecidable manual P 30 45.5211 50 0.69 79
IV.OFFI.HHZ. 2016-10-31T10:00:03.44 0.3 positive manual P 67 43.7229 50 0.63 61
IV.T1215.EHZ. 2016-10-31T10:00:03.59 0.3 undecidable manual S 275 26.3514 50 -0.63 62
XO.AM05.HNZ. 2016-10-31T10:00:03.59 0.3 undecidable manual S 31 25.4523 50 -0.39 68
IV.GIGS.HHZ. 2016-10-31T10:00:03.61 0.1 undecidable manual P 139 47.9187 50 0.14 91
IV.ARRO.EHZ. 2016-10-31T10:00:02.31 0.1 positive manual P 237 41.3253 50 -0.14 92
IV.T1247.HHZ. 2016-10-31T10:00:02.31 0.3 undecidable manual P 167 38.7279 50 0.26 68
IV.T1241.HNZ. 2016-10-31T10:00:02.34 0.1 undecidable manual S 67 21.2676 116 -0.42 90
IV.T1211.EHZ. 2016-10-31T10:00:02.27 0.1 undecidable manual P 225 38.8278 50 0.2 91
IV.T1217.EHZ. 2016-10-31T10:00:02.83 0.3 undecidable manual S 250 22.4553 115 -0.32 69
IV.SMA1.EHZ. 2016-10-31T10:00:01.86 0.3 undecidable manual S 145 20.4684 117 -0.65 63
IV.T1246.HHZ. 2016-10-31T10:00:01.20 0.1 undecidable manual P 132 33.0447 50 0.03 96
IV.TERO.HHZ. 2016-10-31T10:00:01.67 0.1 positive manual P 117 38.0286 50 -0.26 90
IV.T1204.EHZ. 2016-10-31T10:00:01.29 0.1 undecidable manual S 139 15.5733 124 0.25 94
IV.T1299.HNE. 2016-10-31T10:00:01.10 0.3 undecidable manual S 155 17.9709 120 -0.64 63
IV.T1220.EHN. 2016-10-31T10:00:01.63 0.1 undecidable manual P 347 37.4292 50 -0.22 91
IV.T1201.HNE. 2016-10-31T10:00:01.63 0.1 undecidable manual S 160 14.5743 125 0.87 77
IV.CAMP.HHZ. 2016-10-31T10:00:01.38 0.3 undecidable manual P 147 32.5452 50 0.28 68
IV.FDMO.HHN. 2016-10-31T10:00:00.54 0.3 undecidable manual P 343 29.5482 50 -0.09 71
IV.RM33.HNZ. 2016-10-31T10:00:00.80 0.1 undecidable manual P 176 30.2475 50 0.06 96
IV.T1244.EHZ. 2016-10-31T09:59:59.55 0.1 undecidable manual S 107 9.0798 139 0.21 96
XO.AM05.HNZ. 2016-10-31T09:59:59.84 0.3 undecidable manual P 31 25.4523 50 -0.16 71
IV.T1217.EHZ. 2016-10-31T09:59:59.38 0.1 positive manual P 250 22.4553 115 -0.14 95
IV.SMA1.EHZ. 2016-10-31T09:59:59.08 0.1 undecidable manual P 145 20.4684 117 -0.07 97
IV.LNSS.HHN. 2016-10-31T09:59:59.69 0.1 undecidable manual P 212 23.2545 114 0.03 97
IV.T1241.HNZ. 2016-10-31T09:59:59.09 0.1 positive manual P 67 21.2676 116 -0.2 94
IV.T1215.EHZ. 2016-10-31T09:59:59.90 0.1 undecidable manual P 275 26.3514 50 -0.24 93
IV.T1204.EHZ. 2016-10-31T09:59:58.51 0.1 undecidable manual P 139 15.5733 124 0.21 95
IV.T1299.HNE. 2016-10-31T09:59:58.89 0.1 positive manual P 155 17.9709 120 0.18 95
IV.T1201.HNE. 2016-10-31T09:59:58.63 0.1 undecidable manual P 160 14.5743 125 0.49 90
IV.NRCA.HHZ. 2016-10-31T09:59:58.69 0.1 undecidable manual S 313 8.4804 140 -0.51 90
IV.T1216.EHN. 2016-10-31T09:59:58.72 0.3 undecidable manual P 311 18.4704 119 -0.09 73
IV.T1244.EHZ. 2016-10-31T09:59:57.60 0.1 positive manual P 107 9.0798 139 0.28 95
IV.NRCA.HHZ. 2016-10-31T09:59:57.22 0.1 negative manual P 313 8.4804 140 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHN. ML:2.1 0.00016749999999999998 1.06 AML other m 2016-10-31T10:00:21.16
IV.ARVD.HHE. ML:2.1 0.000175 0.46 AML other m 2016-10-31T10:00:29.44
IV.CAFI.HHE. ML:2.2 0.0001095 1.2 AML other m 2016-10-31T10:00:31.98
IV.CAFI.HHN. ML:2.3 0.0001615 0.48 AML other m 2016-10-31T10:00:33.86
IV.CAMP.HHN. ML:2.2 0.0006965 0.9 AML other m 2016-10-31T10:00:06.11
IV.CAMP.HHE. ML:2.1 0.0006314999999999999 0.78 AML other m 2016-10-31T10:00:06.54
IV.CESX.HHE. ML:2.4 0.000632 1.7 AML other m 2016-10-31T10:00:18.13
IV.CESX.HHN. ML:2.4 0.0006475 0.38 AML other m 2016-10-31T10:00:19.15
IV.FIAM.HHN. ML:2.1 0.00029549999999999997 0.98 AML other m 2016-10-31T10:00:17.37
IV.FIAM.HHE. ML:2.2 0.000343 0.9 AML other m 2016-10-31T10:00:17.42
IV.FSSB.HHN. ML:2.8 0.0005565 0.34 AML other m 2016-10-31T10:00:29.76
IV.FSSB.HHE. ML:2.9 0.0006594999999999999 1.6 AML other m 2016-10-31T10:00:36.06
IV.MGAB.HNN. ML:2.8 0.0007105 1.66 AML other m 2016-10-31T10:00:25.93
IV.MGAB.HHE. ML:2.6 0.00046100000000000004 0.76 AML other m 2016-10-31T10:00:28.14
IV.MGAB.HNE. ML:2.6 0.000444 0.78 AML other m 2016-10-31T10:00:28.14
IV.MGAB.HHN. ML:2.8 0.0007055 1.64 AML other m 2016-10-31T10:00:25.92
IV.OFFI.HHN. ML:2.7 0.0014 0.48 AML other m 2016-10-31T10:00:11.66
IV.OFFI.HHE. ML:2.7 0.0017349999999999998 1.5 AML other m 2016-10-31T10:00:17.89
IV.RM33.EHN. ML:2.3 0.0010105 0.36 AML other m 2016-10-31T10:00:06.60
IV.RM33.HNN. ML:2.3 0.001009 0.36 AML other m 2016-10-31T10:00:06.60
IV.RM33.HNE. ML:2.5 0.0014 0.2 AML other m 2016-10-31T10:00:09.05
IV.RM33.EHE. ML:2.4 0.0013900000000000002 0.2 AML other m 2016-10-31T10:00:09.05
IV.SACS.HHE. ML:2.2 0.000144 0.44 AML other m 2016-10-31T10:00:36.01
IV.SACS.HHN. ML:2.2 0.000135 0.74 AML other m 2016-10-31T10:00:30.58
IV.SMA1.EHN. ML:2.6 0.002675 1.72 AML other m 2016-10-31T10:00:05.95
IV.SMA1.EHE. ML:2.5 0.002335 0.6 AML other m 2016-10-31T10:00:07.98
IV.T0110.HHE. ML:2.4 0.00038500000000000003 1.42 AML other m 2016-10-31T10:00:30.21
IV.T0110.HHN. ML:2.5 0.000422 0.9 AML other m 2016-10-31T10:00:20.30
IV.T1211.HNN. ML:2.7 0.0019299999999999999 0.28 AML other m 2016-10-31T10:00:08.75
IV.T1211.HNE. ML:2.5 0.0011255 0.42 AML other m 2016-10-31T10:00:10.82
IV.T1215.HNN. ML:2.4 0.0015350000000000001 1.82 AML other m 2016-10-31T10:00:03.01
IV.T1215.HNE. ML:2.4 0.00125 0.84 AML other m 2016-10-31T10:00:04.59
IV.T1241.EHN. ML:2.6 0.0029050000000000005 0.38 AML other m 2016-10-31T10:00:02.71
IV.T1241.EHE. ML:2.9 0.006075 0.24 AML other m 2016-10-31T10:00:02.73
IV.TERO.HHN. ML:2.7 0.00173 0.14 AML other m 2016-10-31T10:00:07.35
IV.TERO.HHE. ML:2.6 0.0013250000000000002 0.84 AML other m 2016-10-31T10:00:07.57
IV.TRTR.HHN. ML:2.8 0.0015049999999999998 1.3 AML other m 2016-10-31T10:00:24.85
IV.TRTR.HHE. ML:3.0 0.001955 0.6 AML other m 2016-10-31T10:00:25.67
IV.VCEL.EHN. ML:2.6 0.000669 0.66 AML other m 2016-10-31T10:00:18.88
IV.VCEL.EHE. ML:2.6 0.0006795 1.58 AML other m 2016-10-31T10:00:19.79
IV.VVLD.HHN. ML:2.0 0.00009515000000000001 0.38 AML other m 2016-10-31T10:00:38.05
IV.VVLD.HHE. ML:2.1 0.00011760000000000001 0.42 AML other m 2016-10-31T10:00:39.74
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