Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 04-12-2020 and time 06:22:55 (UTC) in region 3 km E Norcia (PG)

A magnitude ML 2.1 earthquake occured in region: 3 km E Norcia (PG), on

  • 04-12-2020 06:22:55 (UTC)
  • 04-12-2020 07:22:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8050, 13.1320 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
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 11 724 5962
Cascia PG 14 3217 9179
Arquata del Tronto AP 14 1178 10357
Visso MC 15 1107 11464
Accumoli RI 15 667 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 19 117 14290
Sellano PG 19 1079 15369
Montemonaco AP 19 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
69 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 Km NW 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 2.1 2020-12-04
06:22:55		 42.805 13.1323 10 2021-02-26
14:56:10		 Bollettino Sismico Italiano INGV 85319461
Reviewed
Rev100 		ML 2.1 2020-12-04
06:22:55		 42.8043 13.1338 10 2020-12-04
06:31:52		 Sala Sismica INGV-Roma 85192221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-04 06:22:55 ± 0.04
Latitude 42.8050 ± 0.0018
Longitude 13.1323 ± 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 85319461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 288
Semi-minor axis of confidence ellipse (meter) 187
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.90022
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 36
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 76
Type of magnitude ML
Reference to an origin 85319461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-09 16:51:32

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 85192221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-04 06:31:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2020-12-04T06:23:19.17 3.0 positive manual P 1.76 0
TV.SF04.EHZ. 2020-12-04T06:23:19.17 3.0 positive manual P 2.99 0
IV.NARO.HHZ. 2020-12-04T06:23:12.67 0.3 undecidable manual P 334 99.9222 50 0.14 62
IV.SNTG.HHZ. 2020-12-04T06:23:12.32 0.3 undecidable manual S 343 52.3032 50 0.06 69
IV.MPAG.EHZ. 2020-12-04T06:23:12.09 0.3 undecidable manual P 342 96.2259 50 0.12 62
IV.MOMA.HHZ. 2020-12-04T06:23:11.03 0.3 undecidable manual S 270 45.7209 50 0.51 63
IV.CESX.HHZ. 2020-12-04T06:23:11.73 0.3 undecidable manual S 244 49.5171 50 0.2 67
IV.FRON.EHZ. 2020-12-04T06:23:10.03 0.3 undecidable manual P 338 85.6476 50 -0.3 61
IV.ARVD.HHZ. 2020-12-04T06:23:09.14 0.3 undecidable manual P 349 78.4659 50 -0.07 65
IV.T0110.HHZ. 2020-12-04T06:23:09.76 0.3 undecidable manual P 140 82.7505 50 -0.12 64
IV.SAP2.EHZ. 2020-12-04T06:23:09.19 0.3 undecidable manual S 34 38.9277 50 0.49 64
IV.SRES.HHZ. 2020-12-04T06:23:09.53 3.0 undecidable manual P -0.61 0
IV.SSFR.HHZ. 2020-12-04T06:23:08.89 0.3 undecidable manual P 338 75.5688 50 0.12 65
IV.ARRO.EHZ. 2020-12-04T06:23:08.62 0.3 undecidable manual S 230 39.0276 50 -0.1 70
IV.FAGN.HHZ. 2020-12-04T06:23:08.15 0.3 undecidable manual P 148 70.2741 50 0.19 65
IV.MURB.HHZ. 2020-12-04T06:23:08.24 0.3 undecidable manual P 316 70.7736 50 0.2 64
IV.MF5.EHZ. 2020-12-04T06:23:07.52 0.1 undecidable manual S 53 33.4443 50 0.29 90
IV.CAMP.HHZ. 2020-12-04T06:23:07.75 0.1 undecidable manual S 143 37.4292 50 -0.54 84
IV.GUMA.HHZ. 2020-12-04T06:23:07.30 0.3 undecidable manual S 30 32.9448 50 0.19 69
IV.CSP1.EHE. 2020-12-04T06:23:06.54 0.1 undecidable manual S 10 32.3454 50 -0.4 88
IV.FOSV.EHZ. 2020-12-04T06:23:06.69 0.1 undecidable manual P 331 62.0934 50 -0.01 91
IV.MNTT.EHZ. 2020-12-04T06:23:05.07 0.1 undecidable manual P 53 47.2194 50 0.67 79
IV.OFFI.HHZ. 2020-12-04T06:23:05.11 0.3 undecidable manual P 72 47.2194 50 0.7 58
IV.CESI.HHZ. 2020-12-04T06:23:05.67 0.3 undecidable manual S 320 28.8489 50 -0.34 67
IV.EL6.EHZ. 2020-12-04T06:23:05.94 0.1 undecidable manual P 358 58.1973 50 -0.16 89
IV.LNSS.HHZ. 2020-12-04T06:23:04.39 0.1 undecidable manual S 199 23.6541 112 0.01 97
IV.ASSB.HHZ. 2020-12-04T06:23:04.06 0.3 undecidable manual P 305 46.62 50 -0.26 67
IV.FDMO.HHN. 2020-12-04T06:23:04.59 0.3 undecidable manual S 352 25.9518 110 -0.53 65
IV.CESX.HHZ. 2020-12-04T06:23:04.85 0.3 undecidable manual P 244 49.5171 50 0.09 69
IV.SMA1.EHZ. 2020-12-04T06:23:04.64 0.3 undecidable manual S 139 25.4523 111 -0.33 68
IV.T1299.HNN. 2020-12-04T06:23:04.17 0.3 undecidable manual S 147 22.5552 113 0.14 71
IV.MOMA.HHZ. 2020-12-04T06:23:04.61 0.3 undecidable manual P 270 45.7209 50 0.43 64
IT.MTCL.HGZ. 2020-12-04T06:23:04.01 0.3 undecidable manual S 333 23.5542 112 -0.35 68
IV.SNTG.HHZ. 2020-12-04T06:23:04.92 0.3 undecidable manual P 343 52.3032 50 -0.27 66
IV.SAP2.EHZ. 2020-12-04T06:23:03.39 0.1 undecidable manual P 34 38.9277 50 0.26 90
IV.TERO.HHZ. 2020-12-04T06:23:03.41 0.3 undecidable manual P 118 43.4232 50 -0.41 65
IV.MTRA.HNZ. 2020-12-04T06:23:03.65 0.3 undecidable manual S 104 22.1556 113 -0.26 70
IV.SEF1.HNN. 2020-12-04T06:23:03.22 0.1 undecidable manual P 338 40.7259 50 -0.19 91
IV.ARRO.EHZ. 2020-12-04T06:23:03.06 0.1 undecidable manual P 230 39.0276 50 -0.08 93
IV.GUMA.HHZ. 2020-12-04T06:23:02.26 0.1 undecidable manual P 30 32.9448 50 0.05 95
IV.MMO1.EHZ. 2020-12-04T06:23:02.72 0.1 undecidable manual S 56 18.9699 117 -0.18 95
IV.MF5.EHZ. 2020-12-04T06:23:02.45 0.1 positive manual P 53 33.4443 50 0.17 93
IV.CAMP.HHZ. 2020-12-04T06:23:02.62 0.1 positive manual P 143 37.4292 50 -0.28 90
IV.PF6.EHN. 2020-12-04T06:23:02.55 0.1 undecidable manual P 8 37.2294 50 -0.32 89
IV.MC2.EHZ. 2020-12-04T06:23:01.32 0.1 undecidable manual S 21 12.6762 127 0.28 94
IV.CSP1.EHE. 2020-12-04T06:23:01.89 0.1 positive manual P 10 32.3454 50 -0.22 92
IV.CESI.HHZ. 2020-12-04T06:23:01.49 0.1 positive manual P 320 28.8489 50 -0.09 95
IT.MTCL.HGZ. 2020-12-04T06:23:00.54 0.1 undecidable manual P 333 23.5542 112 -0.09 96
IV.LNSS.HHZ. 2020-12-04T06:23:00.77 0.1 positive manual P 199 23.6541 112 0.13 95
IV.FDMO.HHN. 2020-12-04T06:23:00.88 0.1 positive manual P 352 25.9518 110 -0.19 93
IV.SMA1.EHZ. 2020-12-04T06:23:00.89 0.1 undecidable manual P 139 25.4523 111 -0.09 95
IV.T1299.HNN. 2020-12-04T06:23:00.66 0.1 positive manual P 147 22.5552 113 0.23 93
IV.MTRA.HNZ. 2020-12-04T06:23:00.34 0.1 undecidable manual P 104 22.1556 113 -0.02 97
IV.NRCA.HNZ. 2020-12-04T06:22:59.12 0.1 undecidable manual S 335 3.4965 160 0.04 100
IV.MC2.EHZ. 2020-12-04T06:22:59.01 0.1 positive manual P 21 12.6762 127 0.3 93
IV.MMO1.EHZ. 2020-12-04T06:22:59.73 0.1 positive manual P 56 18.9699 117 -0.05 97
IV.FEMA.HNE. 2020-12-04T06:22:59.85 0.1 undecidable manual P 339 18.6702 117 0.12 96
IV.NRCA.HNZ. 2020-12-04T06:22:57.89 0.1 positive manual P 335 3.4965 160 0.32 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.8 0.011792110000000001 0.0992 AML other m 2020-12-04T06:22:59.42
IV.NRCA.HNN. ML:3.2 0.027916464999999998 0.1216 AML other m 2020-12-04T06:22:59.27
IV.NRCA.HHN. ML:3.2 0.030095615000000003 0.1216 AML other m 2020-12-04T06:22:59.27
IV.NRCA.HHE. ML:2.8 0.012286035 0.08 AML other m 2020-12-04T06:22:59.56
IV.MTRA.EHE. ML:2.0 0.00072778735 0.1408 AML other m 2020-12-04T06:23:04.64
IV.MTRA.EHN. ML:2.0 0.00075929155 0.2016 AML other m 2020-12-04T06:23:04.64
IV.MTRA.HNE. ML:2.0 0.0007372134 0.1504 AML other m 2020-12-04T06:23:04.64
IV.MTRA.HNN. ML:2.0 0.00079380695 0.2592 AML other m 2020-12-04T06:23:06.29
IV.LNSS.HNE. ML:2.7 0.0034099895 0.1312 AML other m 2020-12-04T06:23:05.07
IV.LNSS.HHE. ML:2.8 0.0036990375000000002 0.1216 AML other m 2020-12-04T06:23:05.07
IV.LNSS.HNN. ML:2.6 0.0023647894999999997 0.16 AML other m 2020-12-04T06:23:05.10
IV.LNSS.HHN. ML:2.6 0.0024765290000000003 0.1792 AML other m 2020-12-04T06:23:05.09
IV.SMA1.EHN. ML:2.0 0.00068757325 0.3584 AML other m 2020-12-04T06:23:08.89
IV.SMA1.EHE. ML:2.1 0.00072630105 0.32 AML other m 2020-12-04T06:23:08.50
IV.CESI.HNE. ML:2.1 0.00067689875 0.1408 AML other m 2020-12-04T06:23:05.89
IV.CESI.HHN. ML:2.3 0.00101462605 0.16 AML other m 2020-12-04T06:23:06.11
IV.CESI.HNN. ML:2.3 0.00097669075 0.1504 AML other m 2020-12-04T06:23:06.12
IV.CESI.HHE. ML:2.1 0.0006661081 0.1408 AML other m 2020-12-04T06:23:05.89
IV.GUMA.HNN. ML:3.6 0.017011409999999998 8.0416 AML other m 2020-12-04T06:23:03.39
IV.GUMA.HHE. ML:2.6 0.001986906 0.2208 AML other m 2020-12-04T06:23:09.44
IV.GUMA.HHN. ML:2.8 0.0025208064999999997 0.2784 AML other m 2020-12-04T06:23:08.18
IV.GUMA.HNE. ML:4.4 0.11368651000000002 12.6304 AML other m 2020-12-04T06:23:03.15
IV.MF5.EHN. ML:2.2 0.00060852445 0.2816 AML other m 2020-12-04T06:23:08.27
IV.MF5.EHE. ML:2.2 0.0007593884 0.2592 AML other m 2020-12-04T06:23:08.26
IV.CAMP.HHE. ML:1.7 0.000196348 0.2016 AML other m 2020-12-04T06:23:08.25
IV.CAMP.HHN. ML:1.7 0.000178969975 0.2976 AML other m 2020-12-04T06:23:08.25
IV.SAP2.EHE. ML:2.4 0.00098730015 0.16 AML other m 2020-12-04T06:23:09.78
IV.SAP2.EHN. ML:3.3 0.007955578500000001 0.16 AML other m 2020-12-04T06:23:10.03
IV.TERO.HNN. ML:2.0 0.0003370549 0.08 AML other m 2020-12-04T06:23:10.44
IV.TERO.HHE. ML:1.9 0.00022555605 0.08 AML other m 2020-12-04T06:23:10.40
IV.TERO.HHN. ML:2.0 0.00031709265 0.08 AML other m 2020-12-04T06:23:10.40
IV.TERO.HNE. ML:1.9 0.00026009145 0.1504 AML other m 2020-12-04T06:23:13.68
IV.ASSB.HHE. ML:1.6 0.000124572215 0.16 AML other m 2020-12-04T06:23:12.57
IV.ASSB.HHN. ML:1.8 0.00016366505 0.2592 AML other m 2020-12-04T06:23:12.83
IV.MOMA.HHE. ML:1.9 0.00021402310000000001 0.2016 AML other m 2020-12-04T06:23:13.29
IV.MOMA.HNN. ML:1.8 0.0001894492 0.32 AML other m 2020-12-04T06:23:14.34
IV.MOMA.HHN. ML:1.8 0.00016966199999999998 0.16 AML other m 2020-12-04T06:23:11.64
IV.MOMA.HNE. ML:1.8 0.000168252855 0.2304 AML other m 2020-12-04T06:23:17.98
IV.CESX.HHE. ML:1.9 0.00019393935 0.4608 AML other m 2020-12-04T06:23:13.60
IV.CESX.HHN. ML:1.8 0.0001806044 0.32 AML other m 2020-12-04T06:23:13.73
IV.SNTG.HNN. ML:1.8 0.00016969784999999998 0.688 AML other m 2020-12-04T06:23:26.58
IV.SNTG.HNE. ML:1.8 0.000170051285 0.1504 AML other m 2020-12-04T06:23:13.44
IV.SNTG.HHE. ML:1.8 0.00014488085 0.1408 AML other m 2020-12-04T06:23:13.45
IV.SNTG.HHN. ML:1.8 0.000160981445 0.1408 AML other m 2020-12-04T06:23:14.56
IV.MNTT.EHE. ML:2.6 0.00102266505 0.4224 AML other m 2020-12-04T06:23:14.78
IV.MNTT.EHN. ML:2.6 0.001292391 0.32 AML other m 2020-12-04T06:23:14.17
IV.OFFI.HHE. ML:2.0 0.0002988799 0.2016 AML other m 2020-12-04T06:23:14.42
IV.OFFI.HHN. ML:2.1 0.0003493077 0.3008 AML other m 2020-12-04T06:23:16.98
IV.EL6.EHE. ML:2.3 0.00041448115 0.16 AML other m 2020-12-04T06:23:15.63
IV.EL6.EHN. ML:2.4 0.0005398138500000001 0.1408 AML other m 2020-12-04T06:23:14.98
IV.FOSV.EHE. ML:1.6 0.000069521335 0.1792 AML other m 2020-12-04T06:23:15.92
IV.FOSV.EHN. ML:1.8 0.00011492321 0.3808 AML other m 2020-12-04T06:23:17.88
IV.FAGN.HHE. ML:2.0 0.00018287029999999998 0.64 AML other m 2020-12-04T06:23:31.28
IV.FAGN.HHN. ML:2.0 0.00015375325000000002 0.2592 AML other m 2020-12-04T06:23:21.43
IV.MURB.HNE. ML:2.2 0.00023351105 0.2304 AML other m 2020-12-04T06:23:21.19
IV.MURB.HHE. ML:2.2 0.00024098995000000002 0.2784 AML other m 2020-12-04T06:23:22.53
IV.MURB.HNN. ML:2.1 0.0002111236 0.4384 AML other m 2020-12-04T06:23:21.41
IV.MURB.HHN. ML:2.1 0.00021414139999999997 0.32 AML other m 2020-12-04T06:23:21.92
IV.SSFR.HHN. ML:2.1 0.0001880696 0.1632 AML other m 2020-12-04T06:23:22.47
IV.SSFR.HNN. ML:2.2 0.00022371245 0.0576 AML other m 2020-12-04T06:23:34.70
IV.SSFR.HNE. ML:2.2 0.0002408268 0.1472 AML other m 2020-12-04T06:23:21.43
IV.SSFR.HHE. ML:2.2 0.00023518745 0.2432 AML other m 2020-12-04T06:23:21.43
IV.ARVD.HHE. ML:1.7 0.00007346416499999999 0.1184 AML other m 2020-12-04T06:23:21.44
IV.ARVD.HHN. ML:1.6 0.000054619360000000005 0.1408 AML other m 2020-12-04T06:23:21.92
IV.SRES.HHE. ML:1.4 0.000034900294999999995 0.2976 AML other m 2020-12-04T06:23:26.43
IV.SRES.HHN. ML:1.6 0.000050235385 0.32 AML other m 2020-12-04T06:23:22.98
IV.T0110.HHN. ML:1.9 0.00009532124000000001 0.2816 AML other m 2020-12-04T06:23:23.95
IV.T0110.HHE. ML:2.0 0.00011918490000000001 0.3424 AML other m 2020-12-04T06:23:25.41
IV.FRON.EHN. ML:1.7 0.000067264005 0.3008 AML other m 2020-12-04T06:23:27.27
IV.FRON.EHE. ML:1.5 0.00004168213 0.1184 AML other m 2020-12-04T06:23:25.04
IV.MPAG.HNE. ML:2.9 0.0009463621500000001 0.88 AML other m 2020-12-04T06:23:19.33
IV.MPAG.HNN. ML:3.0 0.00097587815 0.848 AML other m 2020-12-04T06:23:16.58
IV.MPAG.EHE. ML:1.7 0.000055417565 0.4384 AML other m 2020-12-04T06:23:26.58
IV.MPAG.EHN. ML:1.7 0.000056975495 0.24 AML other m 2020-12-04T06:23:26.80
IV.NARO.HHE. ML:1.4 0.000024173351 0.3008 AML other m 2020-12-04T06:23:32.90
IV.NARO.HHN. ML:1.4 0.000023180104 0.24 AML other m 2020-12-04T06:23:33.85
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