Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 07-12-2020 and time 21:51:37 (UTC) in region 4 km E Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 4 km E Norcia (PG), on

  • 07-12-2020 21:51:37 (UTC)
  • 07-12-2020 22:51:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8100, 13.1360 at 9 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 11 724 5962
Arquata del Tronto AP 14 1178 7140
Visso MC 14 1107 8247
Cascia PG 14 3217 11464
Ussita MC 15 444 11908
Accumoli RI 16 667 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Sellano PG 19 1079 15856
Poggiodomo PG 20 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
49 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)
95 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 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 1.7 2020-12-07
21:51:37		 42.8102 13.1358 9 2021-02-26
14:56:16		 Bollettino Sismico Italiano INGV 86595191
Reviewed
Rev100 		ML 2.0 2020-12-07
21:51:37		 42.8072 13.1375 10 2020-12-07
22:15:23		 Sala Sismica INGV-Roma 85275531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-07 21:51:37 ± 0.04
Latitude 42.8102 ± 0.0018
Longitude 13.1358 ± 0.0025
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86595191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 229
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.76802
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 85275531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-07 22:15:23

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 86595191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-26 11:49:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2020-12-07T21:52:03.59 0.6 undecidable manual S 337 85.248 50 0.08 44
IV.SSFR.HHZ. 2020-12-07T21:52:01.13 0.3 undecidable manual S 338 75.1692 50 0.31 64
IV.ARVD.HHZ. 2020-12-07T21:52:01.83 0.6 undecidable manual S 348 77.9664 50 0.26 43
IV.FOSV.EHZ. 2020-12-07T21:51:57.08 0.6 undecidable manual S 331 61.7937 50 -0.17 45
IV.SNTG.HHZ. 2020-12-07T21:51:54.45 0.3 undecidable manual S 342 51.8037 50 -0.15 69
IV.CESX.HHE. 2020-12-07T21:51:54.36 0.3 undecidable manual S 244 50.0166 50 0.24 68
IV.ASSB.HHZ. 2020-12-07T21:51:53.15 0.3 undecidable manual S 304 46.5201 50 -0.04 72
IV.MNTT.EHZ. 2020-12-07T21:51:53.53 0.6 undecidable manual S 53 46.62 50 0.32 45
IV.MOMA.HNZ. 2020-12-07T21:51:53.22 0.6 undecidable manual S 269 46.0206 50 0.16 47
IV.FRON.EHZ. 2020-12-07T21:51:52.69 0.3 undecidable manual P 337 85.248 50 -0.01 67
IV.ARRO.EHZ. 2020-12-07T21:51:51.05 0.6 undecidable manual S 230 39.627 50 -0.29 46
IV.SSFR.HHZ. 2020-12-07T21:51:51.21 0.3 undecidable manual P 338 75.1692 50 0.07 67
IV.SAP2.EHZ. 2020-12-07T21:51:51.37 0.3 undecidable manual S 34 38.3283 50 0.38 68
IV.ARVD.HHZ. 2020-12-07T21:51:51.47 0.3 undecidable manual P 348 77.9664 50 -0.1 67
IV.TERO.HHZ. 2020-12-07T21:51:51.93 0.3 undecidable manual S 118 43.4232 50 -0.43 66
IV.CAMP.HHZ. 2020-12-07T21:51:50.42 0.6 undecidable manual S 144 37.7289 50 -0.41 45
IV.PF6.EHN. 2020-12-07T21:51:50.09 0.6 undecidable manual S 7 36.6411 50 -0.46 44
IV.GUMA.HHZ. 2020-12-07T21:51:49.45 0.3 undecidable manual S 30 32.3454 50 0.05 73
IV.MF5.EHZ. 2020-12-07T21:51:49.82 0.3 undecidable manual S 53 32.8449 50 0.28 70
IV.FOSV.EHZ. 2020-12-07T21:51:48.97 0.6 undecidable manual P 331 61.7937 50 -0.11 46
IV.CESI.HHZ. 2020-12-07T21:51:48.08 0.3 undecidable manual S 319 28.6491 108 -0.28 70
IV.CSP1.EHZ. 2020-12-07T21:51:48.94 0.3 undecidable manual S 10 31.746 50 -0.3 70
IV.SMA1.EHZ. 2020-12-07T21:51:47.07 0.6 undecidable manual S 141 25.752 110 -0.33 47
IV.SNTG.HHZ. 2020-12-07T21:51:47.37 0.3 undecidable manual P 342 51.8037 50 -0.18 69
IV.CESX.HHE. 2020-12-07T21:51:47.39 0.3 undecidable manual P 244 50.0166 50 0.12 70
IV.LNSS.HHZ. 2020-12-07T21:51:47.16 0.3 undecidable manual S 199 24.2535 111 0.22 72
IV.MNTT.EHZ. 2020-12-07T21:51:47.17 0.3 undecidable manual P 53 46.62 50 0.42 66
IV.MOMA.HNZ. 2020-12-07T21:51:46.93 0.3 undecidable manual P 269 46.0206 50 0.27 68
IV.GAVE.EHZ. 2020-12-07T21:51:46.53 0.3 undecidable manual S 236 23.6541 111 -0.2 72
IT.MTCL.HGZ. 2020-12-07T21:51:46.30 0.3 undecidable manual S 332 23.2545 112 -0.29 71
IV.ASSB.HHZ. 2020-12-07T21:51:46.83 0.3 undecidable manual P 304 46.5201 50 0.09 71
IV.MNTP.HNZ. 2020-12-07T21:51:46.98 0.3 undecidable manual P 37 45.3213 50 0.44 66
IV.FDMO.HHZ. 2020-12-07T21:51:46.93 0.3 undecidable manual S 351 25.4523 110 -0.38 69
IV.T1299.HNZ. 2020-12-07T21:51:46.59 0.3 undecidable manual S 149 22.8549 112 0.11 74
IV.FEMA.HNZ. 2020-12-07T21:51:45.04 0.3 undecidable manual S 337 18.2706 117 0.01 76
IV.MTRA.HNZ. 2020-12-07T21:51:45.94 0.3 undecidable manual S 106 22.0668 113 -0.28 71
IV.TERO.HHZ. 2020-12-07T21:51:45.95 0.3 undecidable manual P 118 43.4232 50 -0.3 68
IT.FOPC.HGN. 2020-12-07T21:51:45.34 0.3 undecidable manual P 297 39.3273 50 -0.28 69
IV.CAMP.HHZ. 2020-12-07T21:51:45.06 0.3 undecidable manual P 144 37.7289 50 -0.31 69
IV.ARRO.EHZ. 2020-12-07T21:51:45.65 0.3 undecidable manual P 230 39.627 50 -0.01 73
IV.SAP2.EHZ. 2020-12-07T21:51:45.70 0.1 undecidable manual P 34 38.3283 50 0.24 93
IV.CSP1.EHZ. 2020-12-07T21:51:44.23 0.3 undecidable manual P 10 31.746 50 -0.23 71
IV.PF6.EHN. 2020-12-07T21:51:44.87 0.3 undecidable manual P 7 36.6411 50 -0.34 68
IV.GUMA.HHZ. 2020-12-07T21:51:44.64 0.3 undecidable manual P 30 32.3454 50 0.09 73
IV.MF5.EHZ. 2020-12-07T21:51:44.80 0.3 undecidable manual P 53 32.8449 50 0.17 71
IV.MMO1.EHZ. 2020-12-07T21:51:44.92 0.3 undecidable manual S 57 18.3705 117 -0.15 74
IV.FDMO.HHZ. 2020-12-07T21:51:43.21 0.3 undecidable manual P 351 25.4523 110 -0.13 73
IV.CESI.HHZ. 2020-12-07T21:51:43.87 0.3 undecidable manual P 319 28.6491 108 -0.08 73
IV.T1299.HNZ. 2020-12-07T21:51:43.07 0.1 undecidable manual P 149 22.8549 112 0.21 96
IV.LNSS.HHZ. 2020-12-07T21:51:43.18 0.3 undecidable manual P 199 24.2535 111 0.06 74
IV.GAVE.EHZ. 2020-12-07T21:51:43.21 0.3 undecidable manual P 236 23.6541 111 0.21 72
IV.MC2.EHZ. 2020-12-07T21:51:43.32 0.3 undecidable manual S 21 12.0768 128 0.13 75
IV.SMA1.EHZ. 2020-12-07T21:51:43.26 0.3 undecidable manual P 141 25.752 110 -0.13 73
IV.FEMA.HNZ. 2020-12-07T21:51:42.08 0.3 undecidable manual P 337 18.2706 117 0.06 75
IV.MTRA.HNZ. 2020-12-07T21:51:42.75 0.6 undecidable manual P 106 22.0668 113 0.04 50
IT.MTCL.HGZ. 2020-12-07T21:51:42.88 0.3 undecidable manual P 332 23.2545 112 -0.04 75
IV.MC2.EHZ. 2020-12-07T21:51:41.29 0.1 positive manual P 21 12.0768 128 0.33 96
IV.MMO1.EHZ. 2020-12-07T21:51:41.99 0.1 undecidable manual P 57 18.3705 117 -0.06 100
IV.NRCA.HNZ. 2020-12-07T21:51:41.33 0.3 undecidable manual S 326 3.0969 161 0.01 78
IV.NRCA.HNZ. 2020-12-07T21:51:40.25 0.1 positive manual P 326 3.0969 161 0.37 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.7 0.00032878184999999996 0.1664 AML other m 2020-12-07T21:51:46.80
IV.MTRA.EHN. ML:1.6 0.00029889515 0.1664 AML other m 2020-12-07T21:51:46.80
IV.MTRA.HNE. ML:1.5 0.0002105619 0.1664 AML other m 2020-12-07T21:51:46.96
IV.FDMO.HHE. ML:1.6 0.0002443767 0.128 AML other m 2020-12-07T21:51:47.16
IV.MTRA.EHE. ML:1.5 0.00019998730000000002 0.1152 AML other m 2020-12-07T21:51:47.34
IV.GAVE.HNE. ML:1.9 0.00048232544999999996 0.2304 AML other m 2020-12-07T21:51:47.35
IV.GAVE.EHE. ML:1.9 0.00048106380000000005 0.2304 AML other m 2020-12-07T21:51:47.35
IV.FDMO.HHN. ML:1.7 0.00027350165000000005 0.1152 AML other m 2020-12-07T21:51:47.33
IV.LNSS.HHE. ML:2.2 0.001147 0.12 AML other m 2020-12-07T21:51:47.60
IV.LNSS.HNE. ML:2.2 0.00104407255 0.1152 AML other m 2020-12-07T21:51:47.61
IV.GAVE.EHN. ML:1.9 0.0004564973 0.1664 AML other m 2020-12-07T21:51:47.62
IV.LNSS.HHN. ML:2.2 0.0011135000000000001 0.18 AML other m 2020-12-07T21:51:47.64
IV.LNSS.HNN. ML:2.2 0.001049 0.16 AML other m 2020-12-07T21:51:47.65
IV.CESI.HHN. ML:1.9 0.00038266305 0.2304 AML other m 2020-12-07T21:51:48.35
IV.CESI.HNN. ML:1.8 0.00036199999999999996 0.24 AML other m 2020-12-07T21:51:48.36
IV.CESI.HHE. ML:1.8 0.00030757115 0.1792 AML other m 2020-12-07T21:51:48.31
IV.CESI.HNE. ML:1.8 0.00035155815 0.192 AML other m 2020-12-07T21:51:48.22
IV.CSP1.EHE. ML:2.2 0.0007211111 0.1536 AML other m 2020-12-07T21:51:49.86
IV.GUMA.HHN. ML:2.2 0.0006928329 0.2176 AML other m 2020-12-07T21:51:50.34
IV.GUMA.HNE. ML:2.2 0.0007095000000000001 0.38 AML other m 2020-12-07T21:51:50.20
IV.MF5.EHE. ML:1.6 0.0001715757 0.2944 AML other m 2020-12-07T21:51:50.41
IV.CSP1.EHN. ML:2.2 0.00067019635 0.2816 AML other m 2020-12-07T21:51:50.42
IV.MF5.EHN. ML:1.6 0.0001850208 0.256 AML other m 2020-12-07T21:51:50.43
IV.CAMP.HHN. ML:1.2 0.00006285000000000001 0.34 AML other m 2020-12-07T21:51:50.48
IV.CAMP.HHE. ML:1.1 0.00004540602000000001 0.1408 AML other m 2020-12-07T21:51:51.47
IV.SMA1.EHN. ML:1.5 0.000186 0.3 AML other m 2020-12-07T21:51:51.48
IV.GUMA.HHE. ML:2.1 0.0005892651 0.2816 AML other m 2020-12-07T21:51:52.38
IV.ARRO.EHN. ML:1.4 0.00009575 0.34 AML other m 2020-12-07T21:51:52.89
IV.SMA1.EHE. ML:1.6 0.00021150000000000002 0.44 AML other m 2020-12-07T21:51:53.18
IV.ARRO.EHE. ML:1.4 0.00007990323 0.192 AML other m 2020-12-07T21:51:53.77
IV.ASSB.HHN. ML:1.4 0.00007594999999999999 0.98 AML other m 2020-12-07T21:51:54.23
IV.SNTG.HHN. ML:1.4 0.00006316622 0.1024 AML other m 2020-12-07T21:51:55.40
IV.ASSB.HHE. ML:1.2 0.000050693475000000003 0.1152 AML other m 2020-12-07T21:51:55.35
IV.SNTG.HHE. ML:1.6 0.0000892 0.14 AML other m 2020-12-07T21:51:55.46
IV.MNTT.EHN. ML:2.0 0.00028681645 0.2688 AML other m 2020-12-07T21:51:56.50
IV.MNTT.EHE. ML:1.9 0.00021833615000000002 0.2432 AML other m 2020-12-07T21:51:56.74
IV.SSFR.HHN. ML:1.7 0.000069522515 0.1408 AML other m 2020-12-07T21:52:02.80
IV.ARVD.HHN. ML:1.2 0.00002579726 0.1408 AML other m 2020-12-07T21:52:03.06
IV.ARVD.HHE. ML:1.4 0.000039083585000000005 0.1408 AML other m 2020-12-07T21:52:03.50
IV.FRON.EHN. ML:1.3 0.0000245962525 0.1024 AML other m 2020-12-07T21:52:06.24
IV.SSFR.HHE. ML:1.7 0.00007205 0.16 AML other m 2020-12-07T21:52:06.85
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