Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 04-11-2021 and time 15:50:06 (UTC) in region 3 km S Norcia (PG)

A magnitude ML 2.0 earthquake occured in region: 3 km S Norcia (PG), on

  • 04-11-2021 15:50:06 (UTC)
  • 04-11-2021 16:50:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7690, 13.0910 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 3 4957 4957
Cascia PG 8 3217 8174
Preci PG 13 724 8898
Poggiodomo PG 14 117 9015
Castelsantangelo sul Nera MC 15 281 9296
Accumoli RI 15 667 9963
Cerreto di Spoleto PG 15 1075 11038
Arquata del Tronto AP 17 1178 12216
Monteleone di Spoleto PG 17 599 12815
Cittareale RI 18 482 13297
Visso MC 18 1107 14404
Vallo di Nera PG 19 364 14768
Sellano PG 19 1079 15847
Ussita MC 20 444 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
100 Km W of Chieti (51815 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 2.0 2021-11-04
15:50:06		 42.7692 13.0908 10 2022-03-30
13:04:17		 Bollettino Sismico Italiano INGV 97745161
Reviewed
Rev100 		ML 2.0 2021-11-04
15:50:06		 42.7688 13.0908 11 2021-11-04
15:57:53		 Sala Sismica INGV-Roma 97258741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-04 15:50:06 ± 0.04
Latitude 42.7692 ± 0.0018
Longitude 13.0908 ± 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 97745161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 239
Semi-minor axis of confidence ellipse (meter) 157
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 251
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 97745161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-12 16:56:43

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 97258741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-04 15:57:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.EHZ. 2021-11-04T15:51:01.34 3.0 undecidable manual Sg 2.85 0
OT.OT17.EHZ. 2021-11-04T15:50:41.21 3.0 negative manual Pn 0.89 0
IV.BRSN.HNZ. 2021-11-04T15:50:36.68 3.0 positive manual Pn 0.89 0
IV.ATVO.HHZ. 2021-11-04T15:50:21.77 0.3 undecidable manual P 321 87.7455 50 0.06 64
IV.TERO.HHZ. 2021-11-04T15:50:21.26 0.6 undecidable manual S 111 44.9217 50 -0.01 47
IV.MOMA.HHZ. 2021-11-04T15:50:21.10 1.0 undecidable manual S 275 42.5241 50 0.45 22
IV.ASSB.HHZ. 2021-11-04T15:50:21.76 0.6 undecidable manual S 311 46.4202 50 0.09 46
IV.GUMA.HHZ. 2021-11-04T15:50:20.20 1.0 undecidable manual S 31 38.1285 50 0.73 20
IV.ARVD.HHZ. 2021-11-04T15:50:20.84 0.3 undecidable manual P 352 81.7515 50 0.05 65
IV.MML1.EHZ. 2021-11-04T15:50:19.90 0.6 undecidable manual S 346 39.4272 50 0.09 47
IV.CSP1.EHZ. 2021-11-04T15:50:19.39 0.6 undecidable manual S 14 36.9297 50 0.23 46
IV.ARRO.EHZ. 2021-11-04T15:50:18.29 1.0 undecidable manual S 232 33.8439 50 -0.04 24
IV.CING.HHZ. 2021-11-04T15:50:18.90 0.3 undecidable manual P 7 67.7766 50 0.26 64
IV.ATCC.EHZ. 2021-11-04T15:50:17.36 0.3 undecidable manual P 322 58.8966 50 0.1 68
IV.CESI.HHZ. 2021-11-04T15:50:17.21 0.6 undecidable manual S 330 30.2475 50 -0.14 47
IV.RM33.EHZ. 2021-11-04T15:50:17.30 0.6 undecidable manual S 161 30.5472 50 -0.15 47
IV.SMA1.EHZ. 2021-11-04T15:50:16.10 0.6 undecidable manual S 128 25.1526 50 0.09 48
IV.FDMO.HHZ. 2021-11-04T15:50:16.89 0.3 undecidable manual S 359 29.6481 50 -0.31 68
IT.MTCL.HGZ. 2021-11-04T15:50:15.88 0.6 undecidable manual S 343 26.0517 50 -0.35 45
IV.ASSB.HHZ. 2021-11-04T15:50:15.23 0.1 positive manual P 311 46.4202 50 -0.11 92
IV.T1299.HNZ. 2021-11-04T15:50:15.05 0.6 undecidable manual S 134 21.6672 116 0.05 49
IV.MMO1.EHZ. 2021-11-04T15:50:15.49 0.3 undecidable manual S 53 24.0537 50 -0.21 70
IV.MTRA.EHZ. 2021-11-04T15:50:15.77 0.3 undecidable manual S 93 24.9528 50 -0.18 71
IV.GUMA.HHZ. 2021-11-04T15:50:14.45 0.1 undecidable manual P 31 38.1285 50 0.39 88
IV.FEMA.HNE. 2021-11-04T15:50:14.59 0.6 undecidable manual S 351 21.6672 116 -0.43 45
IV.MF5.EHZ. 2021-11-04T15:50:14.80 3.0 positive manual P 0.53 0
IV.MML1.EHZ. 2021-11-04T15:50:14.16 0.1 undecidable manual P 346 39.4272 50 -0.1 93
IV.TERO.HHZ. 2021-11-04T15:50:14.91 0.3 undecidable manual P 111 44.9217 50 -0.19 68
IV.MOMA.HHZ. 2021-11-04T15:50:14.82 0.1 undecidable manual P 275 42.5241 50 0.07 93
IV.MC2.EHZ. 2021-11-04T15:50:14.12 0.3 undecidable manual S 27 17.6712 120 0.32 69
IV.CSP1.EHZ. 2021-11-04T15:50:13.92 0.1 undecidable manual P 14 36.9297 50 0.04 95
IV.GAVE.EHZ. 2021-11-04T15:50:13.90 0.3 undecidable manual S 242 18.1707 120 -0.04 74
IV.LNSS.HHZ. 2021-11-04T15:50:13.88 0.3 undecidable manual S 193 18.87 119 -0.29 70
IV.ARRO.EHZ. 2021-11-04T15:50:13.58 0.1 undecidable manual P 232 33.8439 50 0.17 93
IV.FDMO.HHZ. 2021-11-04T15:50:12.65 0.1 undecidable manual P 359 29.6481 50 -0.11 95
IV.RM33.EHZ. 2021-11-04T15:50:12.78 0.1 positive manual P 161 30.5472 50 -0.12 94
IT.MTCL.HGZ. 2021-11-04T15:50:12.12 0.1 undecidable manual P 343 26.0517 50 -0.07 96
IV.CESI.HHZ. 2021-11-04T15:50:12.80 0.1 positive manual P 330 30.2475 50 -0.04 96
IV.SMA1.EHZ. 2021-11-04T15:50:12.20 0.1 undecidable manual P 128 25.1526 50 0.13 95
IV.LNSS.HHZ. 2021-11-04T15:50:11.05 0.1 undecidable manual P 193 18.87 119 0.05 98
IV.MMO1.EHZ. 2021-11-04T15:50:11.74 0.1 undecidable manual P 53 24.0537 50 -0.15 95
IV.MC2.EHZ. 2021-11-04T15:50:11.12 0.1 undecidable manual P 27 17.6712 120 0.33 92
IV.MTRA.EHZ. 2021-11-04T15:50:11.94 0.1 undecidable manual P 93 24.9528 50 -0.09 96
IV.FEMA.HNE. 2021-11-04T15:50:11.50 0.1 undecidable manual P 351 21.6672 116 0.01 98
IV.T1299.HNZ. 2021-11-04T15:50:11.63 0.1 undecidable manual P 134 21.6672 116 0.14 95
IV.NRCA.HNZ. 2021-11-04T15:50:10.65 0.3 undecidable manual S 15 7.3815 145 -0.46 69
IV.GAVE.EHZ. 2021-11-04T15:50:10.97 0.1 positive manual P 242 18.1707 120 0.1 97
IV.NRCA.HNZ. 2021-11-04T15:50:09.27 0.1 positive manual P 15 7.3815 145 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.5 0.005445 0.18 AML other m 2021-11-04T15:50:10.83
IV.NRCA.HHN. ML:2.5 0.004185 0.16 AML other m 2021-11-04T15:50:10.70
IV.NRCA.HNN. ML:2.4 0.00377 0.18 AML other m 2021-11-04T15:50:10.70
IV.NRCA.HNE. ML:2.5 0.0052 0.72 AML other m 2021-11-04T15:50:11.83
IV.GAVE.EHN. ML:2.2 0.00124 0.34 AML other m 2021-11-04T15:50:14.28
IV.GAVE.HNN. ML:1.7 0.000434 0.76 AML other m 2021-11-04T15:50:14.12
IV.GAVE.HNE. ML:2.2 0.0012035 0.4 AML other m 2021-11-04T15:50:14.52
IV.GAVE.EHE. ML:2.1 0.001123 0.12 AML other m 2021-11-04T15:50:14.53
IV.LNSS.HNN. ML:2.1 0.00102 0.14 AML other m 2021-11-04T15:50:14.87
IV.LNSS.HHN. ML:2.1 0.0010899999999999998 0.14 AML other m 2021-11-04T15:50:14.87
IV.LNSS.HNE. ML:2.1 0.0009725000000000001 0.76 AML other m 2021-11-04T15:50:15.36
IV.LNSS.HHE. ML:2.1 0.0009635000000000001 0.92 AML other m 2021-11-04T15:50:15.36
IV.MTRA.HNE. ML:2.3 0.001135 0.32 AML other m 2021-11-04T15:50:16.56
IV.MTRA.EHE. ML:2.3 0.001125 0.32 AML other m 2021-11-04T15:50:16.56
IV.MTRA.HNN. ML:2.0 0.0005549999999999999 0.2 AML other m 2021-11-04T15:50:16.54
IV.MTRA.EHN. ML:2.0 0.0005629999999999999 0.3 AML other m 2021-11-04T15:50:16.55
IV.RM33.EHN. ML:2.1 0.000635 0.24 AML other m 2021-11-04T15:50:17.61
IV.RM33.HNN. ML:2.1 0.000657 0.24 AML other m 2021-11-04T15:50:17.61
IV.FDMO.HHN. ML:2.0 0.00046350000000000004 0.72 AML other m 2021-11-04T15:50:17.66
IV.FDMO.HHE. ML:1.9 0.000382 0.26 AML other m 2021-11-04T15:50:17.80
IV.RM33.HNE. ML:2.0 0.000512 1.44 AML other m 2021-11-04T15:50:17.07
IV.RM33.EHE. ML:2.0 0.0004775 0.12 AML other m 2021-11-04T15:50:17.85
IV.CESI.HHN. ML:2.1 0.0006345000000000001 0.14 AML other m 2021-11-04T15:50:18.00
IV.CESI.HHE. ML:1.8 0.00029800000000000003 1.08 AML other m 2021-11-04T15:50:18.18
IV.CSP1.EHN. ML:2.1 0.0005340000000000001 0.7 AML other m 2021-11-04T15:50:19.95
IV.CSP1.EHE. ML:2.1 0.0005185 0.38 AML other m 2021-11-04T15:50:20.35
IV.MML1.EHE. ML:1.7 0.000192 0.64 AML other m 2021-11-04T15:50:21.12
IV.MML1.EHN. ML:1.7 0.00018449999999999999 1.14 AML other m 2021-11-04T15:50:21.00
IV.TERO.HHN. ML:1.9 0.000257 0.1 AML other m 2021-11-04T15:50:21.57
IV.GUMA.HHN. ML:2.1 0.00042 0.72 AML other m 2021-11-04T15:50:21.27
IV.TERO.HHE. ML:1.8 0.000199 0.12 AML other m 2021-11-04T15:50:21.79
IV.MOMA.HHE. ML:2.0 0.00035099999999999997 1.52 AML other m 2021-11-04T15:50:22.19
IV.MOMA.HNE. ML:2.1 0.0003645 0.58 AML other m 2021-11-04T15:50:22.43
IV.MOMA.HHN. ML:2.0 0.00028300000000000005 0.18 AML other m 2021-11-04T15:50:22.53
IV.ASSB.HHN. ML:1.9 0.0002505 0.16 AML other m 2021-11-04T15:50:22.70
IV.GUMA.HHE. ML:2.0 0.00035350000000000003 1.3 AML other m 2021-11-04T15:50:23.95
IV.MOMA.HNN. ML:2.0 0.00032399999999999996 1.24 AML other m 2021-11-04T15:50:24.67
IV.ASSB.HHE. ML:1.8 0.000188 0.38 AML other m 2021-11-04T15:50:24.77
IV.ATCC.EHN. ML:2.0 0.00019600000000000002 0.6 AML other m 2021-11-04T15:50:27.16
IV.ATCC.EHE. ML:1.8 0.00013550000000000001 1.22 AML other m 2021-11-04T15:50:33.30
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