Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 08-12-2020 and time 22:11:44 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 2.1 earthquake occured in region: 4 km E Norcia (PG), on

  • 08-12-2020 21:11:44 (UTC)
  • 08-12-2020 22:11:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8040, 13.1350 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 4 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 12 724 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
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894
Sellano PG 19 1079 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)
49 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 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)
98 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 2020-12-08
21:11:44		 42.8037 13.1348 10 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87206591
Reviewed
Rev100 		ML 2.0 2020-12-08
21:11:44		 42.8035 13.131 10 2020-12-08
21:19:10		 Sala Sismica INGV-Roma 85296871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-08 21:11:44 ± 0.05
Latitude 42.8037 ± 0.0027
Longitude 13.1348 ± 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 87206591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 344
Semi-minor axis of confidence ellipse (meter) 136
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 83
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70777
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 87206591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-16 09:25:07

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 85296871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-08 21:19:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2020-12-08T21:12:36.08 3.0 undecidable manual Sn -1.99 0
IV.RIBO.EHZ.01 2020-12-08T21:12:32.31 3.0 undecidable manual Sn -0.07 0
IV.ARVD.HHZ. 2020-12-08T21:12:09.16 0.6 undecidable manual S 349 78.5658 50 0.93 34
IV.EL6.EHZ. 2020-12-08T21:12:03.24 0.6 undecidable manual S 357 58.3971 50 0.42 43
IV.CESX.HHZ. 2020-12-08T21:12:00.86 0.6 undecidable manual S 244 49.617 50 0.36 44
IV.ARVD.HHZ. 2020-12-08T21:11:58.04 0.1 undecidable manual P 349 78.5658 50 -0.13 88
IV.SAP2.EHZ. 2020-12-08T21:11:58.43 0.3 undecidable manual S 33 38.9277 50 0.79 58
IV.TERO.HHZ. 2020-12-08T21:11:58.16 0.6 undecidable manual S 118 43.2234 50 -0.62 41
IV.ARRO.EHZ. 2020-12-08T21:11:57.77 0.3 undecidable manual S 231 39.0276 50 0.1 71
IV.GUMA.HHZ. 2020-12-08T21:11:56.32 0.3 undecidable manual S 29 33.0447 50 0.26 69
IV.MF5.EHZ. 2020-12-08T21:11:56.86 0.6 undecidable manual S 52 33.3444 50 0.7 41
IV.CAMP.HHZ. 2020-12-08T21:11:56.65 0.3 undecidable manual S 143 37.2294 50 -0.52 65
IV.CSP1.EHZ. 2020-12-08T21:11:55.55 0.3 undecidable manual S 10 32.4453 50 -0.36 68
IV.EL6.EHZ. 2020-12-08T21:11:54.81 0.1 undecidable manual P 357 58.3971 50 -0.24 89
IV.CESI.HHZ. 2020-12-08T21:11:54.69 0.3 undecidable manual S 320 29.1486 50 -0.33 69
IV.ASSB.HHZ. 2020-12-08T21:11:53.17 0.3 undecidable manual P 305 46.9197 50 -0.11 70
IV.FDMO.HHZ. 2020-12-08T21:11:53.53 0.6 undecidable manual S 352 26.1516 110 -0.54 44
IV.GAVE.EHN. 2020-12-08T21:11:53.13 0.6 undecidable manual S 238 23.1546 112 0.02 50
IV.MNTT.EHZ. 2020-12-08T21:11:53.99 0.3 undecidable manual P 52 47.1195 50 0.67 60
IV.SMA1.EHZ. 2020-12-08T21:11:53.69 0.3 undecidable manual S 140 25.2525 111 -0.09 73
IV.T1299.HNZ. 2020-12-08T21:11:53.22 0.3 undecidable manual S 147 22.2555 113 0.38 69
IV.MOMA.HHZ. 2020-12-08T21:11:53.49 0.3 undecidable manual P 270 45.9207 50 0.35 67
IV.CESX.HHZ. 2020-12-08T21:11:53.93 0.3 undecidable manual P 244 49.617 50 0.22 68
IV.LNSS.HHZ. 2020-12-08T21:11:53.39 0.6 undecidable manual S 199 23.5542 112 0.15 48
IV.SNTG.HHZ. 2020-12-08T21:11:53.85 0.3 undecidable manual P 343 52.503 50 -0.29 67
IV.MTRA.EHZ. 2020-12-08T21:11:52.56 0.3 undecidable manual S 104 21.9669 113 -0.16 72
IT.MTCL.HGZ. 2020-12-08T21:11:52.89 0.6 undecidable manual S 333 23.754 112 -0.43 45
IV.SAP2.EHZ. 2020-12-08T21:11:52.22 0.3 undecidable manual P 33 38.9277 50 0.16 70
IV.TERO.HHZ. 2020-12-08T21:11:52.39 0.3 undecidable manual P 118 43.2234 50 -0.32 67
IV.CAMP.HHZ. 2020-12-08T21:11:51.45 0.1 undecidable manual P 143 37.2294 50 -0.33 91
IV.FEMA.HNE. 2020-12-08T21:11:51.69 0.3 undecidable manual S 339 18.87 117 -0.07 74
IV.ARRO.EHZ. 2020-12-08T21:11:51.96 0.3 undecidable manual P 231 39.0276 50 -0.12 71
IV.GUMA.HHZ. 2020-12-08T21:11:51.15 0.1 undecidable manual P 29 33.0447 50 0 98
IV.MF5.EHZ. 2020-12-08T21:11:51.32 0.1 positive manual P 52 33.3444 50 0.12 95
IV.MMO1.EHZ. 2020-12-08T21:11:51.58 0.3 undecidable manual S 56 18.87 117 -0.18 72
IV.CESI.HHZ. 2020-12-08T21:11:50.38 0.1 positive manual P 320 29.1486 50 -0.16 95
IV.CSP1.EHZ. 2020-12-08T21:11:50.74 0.1 positive manual P 10 32.4453 50 -0.32 92
IV.MC2.EHZ. 2020-12-08T21:11:50.34 0.3 undecidable manual S 20 12.7761 127 0.41 70
IV.T1299.HNZ. 2020-12-08T21:11:49.51 0.1 undecidable manual P 147 22.2555 113 0.22 95
IV.LNSS.HHZ. 2020-12-08T21:11:49.57 0.1 positive manual P 199 23.5542 112 0.05 98
IV.FDMO.HHZ. 2020-12-08T21:11:49.74 0.1 positive manual P 352 26.1516 110 -0.25 94
IV.GAVE.EHN. 2020-12-08T21:11:49.59 0.1 undecidable manual P 238 23.1546 112 0.15 97
IV.MTRA.EHZ. 2020-12-08T21:11:49.16 0.3 undecidable manual P 104 21.9669 113 -0.06 74
IV.SMA1.EHZ. 2020-12-08T21:11:49.75 0.3 undecidable manual P 140 25.2525 111 -0.08 73
IT.MTCL.HGZ. 2020-12-08T21:11:49.36 0.1 undecidable manual P 333 23.754 112 -0.2 95
IV.MMO1.EHZ. 2020-12-08T21:11:48.46 0.1 negative manual P 56 18.87 117 -0.2 96
IV.FEMA.HNE. 2020-12-08T21:11:48.67 0.1 undecidable manual P 339 18.87 117 0.01 100
IV.MC2.EHZ. 2020-12-08T21:11:47.88 0.1 positive manual P 20 12.7761 127 0.27 96
IV.NRCA.HNZ. 2020-12-08T21:11:47.92 0.3 undecidable manual S 333 3.6963 159 -0.04 77
IV.NRCA.HNZ. 2020-12-08T21:11:46.75 0.1 undecidable manual P 333 3.6963 159 0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.9 0.014199999999999999 0.14 AML other m 2020-12-08T21:11:48.10
IV.NRCA.HNN. ML:2.8 0.01345 0.14 AML other m 2020-12-08T21:11:48.10
IV.NRCA.HNE. ML:2.6 0.00704 0.1 AML other m 2020-12-08T21:11:48.25
IV.NRCA.HHE. ML:2.5 0.006849999999999999 0.1 AML other m 2020-12-08T21:11:48.30
IV.MTRA.HNN. ML:1.8 0.0004575 0.16 AML other m 2020-12-08T21:11:53.17
IV.MTRA.EHN. ML:1.8 0.00046550000000000004 0.16 AML other m 2020-12-08T21:11:53.17
IV.MTRA.HNE. ML:1.8 0.00043599999999999997 0.26 AML other m 2020-12-08T21:11:53.46
IV.MTRA.EHE. ML:1.8 0.00042100000000000004 0.22 AML other m 2020-12-08T21:11:53.46
IV.FDMO.HHN. ML:1.9 0.000495 1 AML other m 2020-12-08T21:11:53.32
IV.LNSS.HNE. ML:2.5 0.0018599999999999999 0.1 AML other m 2020-12-08T21:11:53.87
IV.LNSS.HHE. ML:2.5 0.002 0.1 AML other m 2020-12-08T21:11:53.87
IV.LNSS.HNN. ML:2.4 0.0016899999999999999 0.6 AML other m 2020-12-08T21:11:53.59
IV.LNSS.HHN. ML:2.4 0.0017349999999999998 0.6 AML other m 2020-12-08T21:11:53.89
IV.FDMO.HHE. ML:1.8 0.000348 0.26 AML other m 2020-12-08T21:11:54.65
IV.CESI.HHN. ML:1.9 0.00040500000000000003 0.12 AML other m 2020-12-08T21:11:55.00
IV.CESI.HHE. ML:1.8 0.0003195 0.24 AML other m 2020-12-08T21:11:55.23
IV.CSP1.EHN. ML:2.3 0.0008100000000000001 1 AML other m 2020-12-08T21:11:55.77
IV.CSP1.EHE. ML:2.3 0.0008005 0.14 AML other m 2020-12-08T21:11:56.58
IV.SMA1.EHE. ML:1.9 0.00046 0.76 AML other m 2020-12-08T21:11:56.83
IV.SMA1.EHN. ML:1.8 0.000397 0.72 AML other m 2020-12-08T21:11:56.63
IV.GUMA.HHN. ML:2.4 0.001175 1.7 AML other m 2020-12-08T21:11:57.07
IV.MF5.EHE. ML:2.0 0.0003805 0.5 AML other m 2020-12-08T21:11:57.12
IV.ARRO.EHE. ML:1.6 0.0001595 0.2 AML other m 2020-12-08T21:11:58.79
IV.SAP2.EHN. ML:3.1 0.0044 0.18 AML other m 2020-12-08T21:11:58.83
IV.TERO.HHE. ML:1.7 0.00015200000000000004 1.44 AML other m 2020-12-08T21:11:58.94
IV.SAP2.EHE. ML:2.1 0.00047349999999999996 1.84 AML other m 2020-12-08T21:11:59.00
IV.GUMA.HHE. ML:2.4 0.0010750000000000002 1.08 AML other m 2020-12-08T21:11:59.63
IV.MF5.EHN. ML:1.9 0.00034950000000000004 0.46 AML other m 2020-12-08T21:11:59.41
IV.ARRO.EHN. ML:1.8 0.00020250000000000002 1.42 AML other m 2020-12-08T21:11:59.88
IV.TERO.HNE. ML:1.8 0.0001815 1.2 AML other m 2020-12-08T21:12:00.07
IV.TERO.HHN. ML:1.8 0.000202 0.44 AML other m 2020-12-08T21:12:00.38
IV.CESX.HHN. ML:1.6 0.0001135 0.82 AML other m 2020-12-08T21:12:02.00
IV.TERO.HNN. ML:2.0 0.0003 0.64 AML other m 2020-12-08T21:12:02.17
IV.MNTT.EHE. ML:2.4 0.0007235000000000001 0.74 AML other m 2020-12-08T21:12:03.45
IV.MNTT.EHN. ML:2.4 0.0007325 0.84 AML other m 2020-12-08T21:12:03.50
IV.CESX.HHE. ML:1.7 0.000122 0.68 AML other m 2020-12-08T21:12:03.87
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