Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 01-12-2021 and time 20:17:00 (UTC) in region 3 km W Spello (PG)

A magnitude ML 1.7 earthquake occured in region: 3 km W Spello (PG), on

  • 01-12-2021 20:17:00 (UTC)
  • 01-12-2021 21:17:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0080, 12.6340 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
Spello PG 3 8645 8645
Cannara PG 4 4305 12950
Assisi PG 7 28299 41249
Foligno PG 8 57155 98404
Bevagna PG 8 5081 103485
Bastia Umbra PG 10 21874 125359
Valtopina PG 11 1398 126757
Bettona PG 12 4367 131124
Montefalco PG 13 5679 136803
Gualdo Cattaneo PG 13 6155 142958
Torgiano PG 16 6725 149683
Trevi PG 17 8469 158152
Valfabbrica PG 17 3389 161541
Nocera Umbra PG 17 5839 167380
Deruta PG 18 9669 177049
Giano dell'Umbria PG 20 3846 180895

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NW of Foligno (57155 inhabitants)
23 Km E of Perugia (166134 inhabitants)
50 Km N of Terni (111501 inhabitants)
79 Km NE of Viterbo (67173 inhabitants)
80 Km SE of Arezzo (99543 inhabitants)
96 Km W of Teramo (54892 inhabitants)
96 Km NW of L'Aquila (69753 inhabitants)
98 Km SW of Fano (60888 inhabitants)
99 Km SW of Ancona (100861 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 2021-12-01
20:17:00		 43.0077 12.6345 9 2022-03-30
13:04:35		 Bollettino Sismico Italiano INGV 100648751
Reviewed
Rev100 		ML 1.8 2021-12-01
20:17:00		 43.0107 12.6162 9 2021-12-01
20:28:02		 Sala Sismica INGV-Roma 98027411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-01 20:17:00 ± 0.06
Latitude 43.0077 ± 0.0027
Longitude 12.6345 ± 0.0049
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 100648751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 208
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.63672
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 100648751
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-11 15:11:12

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 98027411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-01 20:28:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-12-01T20:17:20.14 0.6 undecidable manual S 24 59.7957 50 0.36 43
IV.PIEI.HHZ. 2021-12-01T20:17:20.39 0.6 undecidable manual S 352 59.0964 50 0.79 37
IV.LNSS.HHZ. 2021-12-01T20:17:19.08 0.3 undecidable manual S 144 55.6998 50 0.38 65
IV.MMO1.EHZ. 2021-12-01T20:17:19.25 0.6 undecidable manual S 102 57.498 50 0.09 46
IV.GUMA.HHZ. 2021-12-01T20:17:19.94 0.6 undecidable manual S 84 57.0984 50 0.87 36
IV.CSP1.EHZ. 2021-12-01T20:17:16.64 0.3 undecidable manual S 78 47.2194 50 0.23 68
IV.MC2.EHZ. 2021-12-01T20:17:16.56 0.6 undecidable manual S 103 46.2204 50 0.4 44
IV.SSFR.HHZ. 2021-12-01T20:17:16.87 0.6 undecidable manual S 14 49.0176 50 -0.04 47
IV.NRCA.HHZ. 2021-12-01T20:17:15.33 0.3 undecidable manual S 116 43.5231 50 -0.1 70
IV.CESX.HHZ. 2021-12-01T20:17:15.34 0.6 undecidable manual S 185 44.4222 50 -0.34 45
IV.MGAB.HHZ. 2021-12-01T20:17:15.84 0.1 undecidable manual S 256 43.7229 50 0.36 89
IV.GAVE.EHZ. 2021-12-01T20:17:14.85 0.6 undecidable manual S 149 40.8258 50 0.12 47
IV.FDMO.HHZ. 2021-12-01T20:17:13.18 0.6 undecidable manual S 85 36.8298 50 -0.48 44
IV.MF5.EHZ. 2021-12-01T20:17:13.51 0.3 undecidable manual P 92 66.9774 50 0.62 59
IV.SNTG.HHZ. 2021-12-01T20:17:13.28 0.6 undecidable manual S 42 36.9297 50 -0.41 45
IV.NARO.HHZ. 2021-12-01T20:17:13.20 0.3 undecidable manual P 356 67.0773 50 0.3 65
IV.SMA1.EHZ. 2021-12-01T20:17:13.61 0.3 undecidable manual P 126 70.6737 50 0.14 66
IV.FOSV.EHZ. 2021-12-01T20:17:12.58 0.6 undecidable manual S 18 33.4443 50 -0.17 47
IV.PIEI.HHZ. 2021-12-01T20:17:11.71 0.1 undecidable manual P 352 59.0964 50 0.03 93
IV.GUMA.HHZ. 2021-12-01T20:17:11.46 0.3 undecidable manual P 84 57.0984 50 0.09 69
IV.MURB.HHZ. 2021-12-01T20:17:11.68 0.6 undecidable manual S 343 29.6481 107 0.07 48
IV.ARVD.HHZ. 2021-12-01T20:17:11.60 0.1 undecidable manual P 24 59.7957 50 -0.18 90
IV.MMO1.EHZ. 2021-12-01T20:17:11.20 0.3 undecidable manual P 102 57.498 50 -0.22 67
IV.LNSS.HHZ. 2021-12-01T20:17:10.85 0.1 undecidable manual P 144 55.6998 50 -0.31 88
IV.MC2.EHZ. 2021-12-01T20:17:10.52 0.3 undecidable manual P 103 46.2204 50 0.83 56
IV.MOMA.HHZ. 2021-12-01T20:17:09.23 0.6 undecidable manual S 193 23.1546 111 -0.24 47
IV.SSFR.HHZ. 2021-12-01T20:17:09.92 0.3 undecidable manual P 14 49.0176 50 -0.2 68
IV.ATMI.HHZ. 2021-12-01T20:17:09.88 0.3 undecidable manual P 321 46.8198 50 0.1 70
IV.CESI.HHZ. 2021-12-01T20:17:09.08 0.3 undecidable manual S 91 21.9669 112 0.02 74
IV.CESX.HHZ. 2021-12-01T20:17:09.03 0.3 undecidable manual P 185 44.4222 50 -0.39 66
IV.MGAB.HHZ. 2021-12-01T20:17:09.24 0.1 undecidable manual P 256 43.7229 50 -0.06 95
IT.GNU.HGE. 2021-12-01T20:17:09.50 0.3 undecidable manual S 193 23.1546 111 0.03 74
IV.CSP1.EHZ. 2021-12-01T20:17:09.60 0.1 undecidable manual P 78 47.2194 50 -0.24 91
IV.NRCA.HHZ. 2021-12-01T20:17:08.87 0.1 undecidable manual P 116 43.5231 50 -0.4 88
IV.GAVE.EHZ. 2021-12-01T20:17:08.60 0.1 undecidable manual P 149 40.8258 50 -0.26 91
IV.ATCC.EHZ. 2021-12-01T20:17:08.35 0.6 undecidable manual S 1 19.6692 114 0 50
IV.FDMO.HHZ. 2021-12-01T20:17:07.94 0.1 undecidable manual P 85 36.8298 50 -0.31 91
IV.SNTG.HHZ. 2021-12-01T20:17:07.90 0.1 undecidable manual P 42 36.9297 50 -0.37 90
IV.FOSV.EHZ. 2021-12-01T20:17:07.47 0.1 undecidable manual P 18 33.4443 50 -0.26 93
IV.MURB.HHZ. 2021-12-01T20:17:06.86 0.1 undecidable manual P 343 29.6481 107 -0.21 94
IV.ATCC.EHZ. 2021-12-01T20:17:05.23 0.1 positive manual P 1 19.6692 114 0.04 99
IT.GNU.HGE. 2021-12-01T20:17:05.98 0.3 undecidable manual P 193 23.1546 111 0.14 72
IV.MOMA.HHZ. 2021-12-01T20:17:05.89 0.3 undecidable manual P 193 23.1546 111 0.06 74
IV.CESI.HHZ. 2021-12-01T20:17:05.61 0.1 undecidable manual P 91 21.9669 112 0.02 99
IT.FOPC.HGZ. 2021-12-01T20:17:04.87 0.1 undecidable manual S 127 6.993 142 0.11 100
IT.FOPC.HGZ. 2021-12-01T20:17:03.31 0.1 negative manual P 127 6.993 142 0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IT.FOPC.HGN. ML:3.9 0.1201 0.14 AML other m 2021-12-01T20:17:04.97
IT.FOPC.HGE. ML:3.9 0.1385 1.84 AML other m 2021-12-01T20:17:05.02
IV.ATCC.EHN. ML:1.8 0.00045650000000000004 0.46 AML other m 2021-12-01T20:17:08.51
IV.ATCC.EHE. ML:1.8 0.0004985 0.6 AML other m 2021-12-01T20:17:08.38
IV.ATCC.HNE. ML:1.8 0.0005195000000000001 0.78 AML other m 2021-12-01T20:17:08.37
IV.ATCC.HNN. ML:1.8 0.0005105 0.78 AML other m 2021-12-01T20:17:09.40
IV.MOMA.HHN. ML:1.7 0.0003255 0.3 AML other m 2021-12-01T20:17:09.70
IV.MOMA.HNN. ML:1.8 0.000365 0.52 AML other m 2021-12-01T20:17:09.70
IV.CESI.HHE. ML:1.4 0.000187 0.1 AML other m 2021-12-01T20:17:10.16
IV.CESI.HHN. ML:1.5 0.000203 0.62 AML other m 2021-12-01T20:17:10.18
IV.MOMA.HHE. ML:1.8 0.000429 1.1 AML other m 2021-12-01T20:17:10.60
IV.MOMA.HNE. ML:1.8 0.00039249999999999995 1.1 AML other m 2021-12-01T20:17:10.60
IV.FOSV.EHE. ML:1.6 0.000178 1.44 AML other m 2021-12-01T20:17:12.05
IV.MURB.HNN. ML:2.0 0.0005785 0.6 AML other m 2021-12-01T20:17:12.66
IV.MURB.HHN. ML:2.2 0.00074 1.82 AML other m 2021-12-01T20:17:12.05
IV.FOSV.EHN. ML:1.5 0.0001505 0.28 AML other m 2021-12-01T20:17:13.29
IV.MURB.HHE. ML:2.0 0.0005295 0.18 AML other m 2021-12-01T20:17:13.70
IV.FDMO.HHN. ML:1.6 0.00013900000000000002 0.18 AML other m 2021-12-01T20:17:13.87
IV.SNTG.HHE. ML:1.4 0.00009850000000000001 1.46 AML other m 2021-12-01T20:17:14.04
IV.SNTG.HHN. ML:1.4 0.00010059999999999999 0.64 AML other m 2021-12-01T20:17:14.52
IV.MURB.HNE. ML:2.0 0.000517 0.22 AML other m 2021-12-01T20:17:14.84
IV.FDMO.HHE. ML:1.4 0.00009934999999999999 1.1 AML other m 2021-12-01T20:17:15.60
IV.GAVE.EHE. ML:1.7 0.0001855 0.12 AML other m 2021-12-01T20:17:15.39
IV.CESX.HHN. ML:1.4 0.00007343678490000001 0.256 AML other m 2021-12-01T20:17:15.83
IV.GAVE.EHN. ML:1.6 0.000126 0.48 AML other m 2021-12-01T20:17:15.48
IV.NRCA.HHN. ML:1.9 0.00026749999999999994 0.18 AML other m 2021-12-01T20:17:15.92
IV.NRCA.HHE. ML:1.9 0.00023099999999999998 0.1 AML other m 2021-12-01T20:17:16.10
IV.CESX.HHE. ML:1.4 0.00007210032999999999 0.3072 AML other m 2021-12-01T20:17:16.88
IV.MGAB.HHE. ML:1.2 0.00004750342 0.1536 AML other m 2021-12-01T20:17:17.20
IV.CSP1.EHE. ML:1.9 0.000232 0.14 AML other m 2021-12-01T20:17:17.38
IV.CSP1.EHN. ML:2.0 0.0002575 0.16 AML other m 2021-12-01T20:17:17.66
IV.SSFR.HHE. ML:2.0 0.00024050000000000002 0.38 AML other m 2021-12-01T20:17:17.75
IV.MGAB.HHN. ML:1.4 0.00007021842 0.1792 AML other m 2021-12-01T20:17:18.28
IV.SSFR.HHN. ML:2.0 0.000252 0.58 AML other m 2021-12-01T20:17:19.09
IV.MMO1.EHN. ML:1.9 0.000186 0.98 AML other m 2021-12-01T20:17:19.91
IV.MMO1.EHE. ML:1.9 0.000178 0.18 AML other m 2021-12-01T20:17:20.11
IV.LNSS.HHE. ML:1.7 0.00010885 0.36 AML other m 2021-12-01T20:17:20.45
IV.GUMA.HHE. ML:2.1 0.0002604846 0.256 AML other m 2021-12-01T20:17:20.45
IV.LNSS.HHN. ML:1.6 0.00007831081500000001 0.384 AML other m 2021-12-01T20:17:20.52
IV.ARVD.HHE. ML:1.2 0.00003435298 0.1664 AML other m 2021-12-01T20:17:20.70
IV.GUMA.HHN. ML:1.7 0.00012202094999999999 0.2816 AML other m 2021-12-01T20:17:21.28
IV.ARVD.HHN. ML:1.1 0.0000243794175 0.1792 AML other m 2021-12-01T20:17:21.30
IV.ATMI.HHE. ML:1.6 0.00011730000000000002 0.26 AML other m 2021-12-01T20:17:21.37
IV.PIEI.HHN. ML:1.7 0.0001008 0.24 AML other m 2021-12-01T20:17:21.48
IV.PIEI.HHE. ML:1.7 0.0001044 0.22 AML other m 2021-12-01T20:17:21.62
IV.ATMI.HHN. ML:1.7 0.00012940000000000003 0.44 AML other m 2021-12-01T20:17:23.20
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