Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 02-12-2021 and time 23:41:53 (UTC) in region 5 km NW Sant'Anatolia di Narco (PG)

A magnitude ML 1.7 earthquake occured in region: 5 km NW Sant'Anatolia di Narco (PG), on

  • 02-12-2021 23:41:53 (UTC)
  • 03-12-2021 00:41:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7660, 12.7980 at 8 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
Sant'Anatolia di Narco PG 5 564 564
Vallo di Nera PG 5 364 928
Spoleto PG 6 38218 39146
Campello sul Clitunno PG 6 2442 41588
Scheggino PG 6 461 42049
Cerreto di Spoleto PG 11 1075 43124
Castel Ritaldi PG 12 3278 46402
Poggiodomo PG 13 117 46519
Trevi PG 13 8469 54988
Ferentillo TR 16 1913 56901
Sellano PG 17 1079 57980
Monteleone di Spoleto PG 18 599 58579
Cascia PG 18 3217 61796
Montefalco PG 19 5679 67475
Montefranco TR 19 1276 68751
Giano dell'Umbria PG 20 3846 72597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SE of Foligno (57155 inhabitants)
26 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
69 Km NE of Viterbo (67173 inhabitants)
75 Km W of Teramo (54892 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
100 Km N of Roma (2864731 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 2021-12-02
23:41:53		 42.766 12.7985 9 2022-03-30
13:04:36		 Bollettino Sismico Italiano INGV 100801721
Reviewed
Rev100 		ML 1.7 2021-12-02
23:41:53		 42.7633 12.7993 8 2021-12-02
23:56:55		 Sala Sismica INGV-Roma 98076981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-02 23:41:53 ± 0.05
Latitude 42.7660 ± 0.0027
Longitude 12.7985 ± 0.0037
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 100801721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 246
Semi-minor axis of confidence ellipse (meter) 196
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 162
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57017
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 100801721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-09 09:57:03

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 21
Type of magnitude ML
Reference to an origin 98076981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-02 23:56:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRTC.HHZ. 2021-12-02T23:42:25.22 3.0 undecidable manual S -0.14 0
IV.VCEL.EHZ. 2021-12-02T23:42:23.94 3.0 undecidable manual S 2.19 0
IV.ARVD.HHZ. 2021-12-02T23:42:18.97 3.0 undecidable manual S 0.61 0
IV.SSFR.HHZ. 2021-12-02T23:42:16.80 3.0 undecidable manual S 0.48 0
IV.EL6.EHZ. 2021-12-02T23:42:14.64 3.0 undecidable manual S 0.26 0
IV.FIAM.HNZ. 2021-12-02T23:42:12.78 0.1 undecidable manual S 155 61.0944 50 0.15 91
IV.SNTG.HHZ. 2021-12-02T23:42:11.13 3.0 undecidable manual S -0.14 0
IV.MGAB.HHZ. 2021-12-02T23:42:11.99 3.0 undecidable manual S 0.04 0
IV.SMA1.EHZ. 2021-12-02T23:42:09.16 0.1 undecidable manual S 109 46.3203 50 0.48 87
IV.ATCC.EHZ. 2021-12-02T23:42:09.30 0.1 undecidable manual S 345 48.2184 50 0.09 95
IV.CSP1.EHZ. 2021-12-02T23:42:09.18 0.1 undecidable manual S 42 48.9177 50 -0.21 92
IV.MTRA.HNZ. 2021-12-02T23:42:09.64 0.6 undecidable manual S 91 48.7179 50 0.31 45
IV.ARVD.HHZ. 2021-12-02T23:42:07.39 3.0 undecidable manual P -0.37 0
IV.FDMO.HHZ. 2021-12-02T23:42:06.26 0.1 undecidable manual S 38 38.1285 50 -0.24 93
IV.SSFR.HHZ. 2021-12-02T23:42:06.44 3.0 undecidable manual P -0.15 0
IV.EL6.EHZ. 2021-12-02T23:42:05.43 3.0 undecidable manual P -0.04 0
IV.SRES.HHN. 2021-12-02T23:42:05.20 1.0 undecidable manual P 202 63.2922 50 0.41 22
IV.MC2.EHZ. 2021-12-02T23:42:05.90 0.6 undecidable manual S 63 35.6421 50 0.06 49
IV.MGAB.HHZ. 2021-12-02T23:42:04.08 3.0 undecidable manual P 0.02 0
IV.FEMA.HNZ. 2021-12-02T23:42:04.05 0.1 undecidable manual S 43 29.8479 106 -0.02 99
IV.FIAM.HNZ. 2021-12-02T23:42:04.03 0.1 undecidable manual P 155 61.0944 50 -0.43 86
IV.CESI.HHZ. 2021-12-02T23:42:03.44 0.1 undecidable manual S 18 27.8499 107 0.03 99
IT.MTCL.HGZ. 2021-12-02T23:42:03.78 0.3 undecidable manual S 33 30.1476 106 -0.37 69
IV.SNTG.HHZ. 2021-12-02T23:42:03.27 3.0 undecidable manual P -0.39 0
IV.NRCA.HHZ. 2021-12-02T23:42:03.21 0.1 undecidable manual S 74 26.751 108 0.17 97
IV.ATCC.EHZ. 2021-12-02T23:42:02.29 0.1 undecidable manual P 345 48.2184 50 -0.19 93
IV.CSP1.EHZ. 2021-12-02T23:42:02.47 0.1 undecidable manual P 42 48.9177 50 -0.12 94
IV.MTRA.HNZ. 2021-12-02T23:42:02.84 0.3 undecidable manual P 91 48.7179 50 0.29 68
IT.FOPC.HGZ. 2021-12-02T23:42:02.34 0.3 undecidable manual S 341 23.8539 110 0.25 72
IV.LNSS.HHZ. 2021-12-02T23:42:02.89 0.1 undecidable manual S 132 26.751 108 -0.15 97
IV.SMA1.EHZ. 2021-12-02T23:42:02.22 0.1 undecidable manual P 109 46.3203 50 0.04 96
IV.CESX.HHZ. 2021-12-02T23:42:01.95 0.1 undecidable manual S 225 24.5532 109 -0.36 93
IV.MC2.EHZ. 2021-12-02T23:42:00.54 0.1 undecidable manual P 63 35.6421 50 0 99
IV.FDMO.HHZ. 2021-12-02T23:42:00.68 0.1 undecidable manual P 38 38.1285 50 -0.24 93
IT.GNU.HGZ. 2021-12-02T23:42:00.64 0.1 undecidable manual S 283 19.0698 114 0.1 99
IV.FEMA.HNZ. 2021-12-02T23:41:59.57 0.1 undecidable manual P 43 29.8479 106 0.06 98
IV.CESI.HHZ. 2021-12-02T23:41:59.16 0.1 positive manual P 18 27.8499 107 0.02 100
IT.MTCL.HGZ. 2021-12-02T23:41:59.46 0.3 undecidable manual P 33 30.1476 106 -0.1 73
IV.LNSS.HHZ. 2021-12-02T23:41:58.93 0.1 undecidable manual P 132 26.751 108 0.01 100
IV.NRCA.HHZ. 2021-12-02T23:41:58.98 0.1 negative manual P 74 26.751 108 0.05 99
IV.CESX.HHZ. 2021-12-02T23:41:58.41 0.1 undecidable manual P 225 24.5532 109 -0.1 99
IT.FOPC.HGZ. 2021-12-02T23:41:58.43 0.3 undecidable manual P 341 23.8539 110 0.05 75
IT.GNU.HGZ. 2021-12-02T23:41:57.99 0.1 undecidable manual P 283 19.0698 114 0.52 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.5 0.00017851285 0.1408 AML other m 2021-12-02T23:42:02.25
IV.CESX.HHE. ML:1.6 0.0002187615 0.1536 AML other m 2021-12-02T23:42:02.14
IV.LNSS.HNN. ML:1.9 0.00043393530000000003 0.6272 AML other m 2021-12-02T23:42:03.49
IV.LNSS.HHE. ML:1.9 0.0004112329 0.2304 AML other m 2021-12-02T23:42:03.33
IV.LNSS.HNE. ML:1.9 0.00046727724999999997 0.2816 AML other m 2021-12-02T23:42:03.33
IV.LNSS.HHN. ML:1.9 0.00040433410000000004 0.192 AML other m 2021-12-02T23:42:03.49
IV.FDMO.HHN. ML:1.4 0.000103277885 0.3584 AML other m 2021-12-02T23:42:06.59
IV.FDMO.HHE. ML:1.6 0.00013009139999999999 0.1792 AML other m 2021-12-02T23:42:06.65
IV.SMA1.EHE. ML:1.5 0.00008959874 0.6912 AML other m 2021-12-02T23:42:09.58
IV.CSP1.EHE. ML:1.9 0.00021890195000000002 0.7456 AML other m 2021-12-02T23:42:09.21
IV.CSP1.EHN. ML:1.8 0.00017872947 0.2816 AML other m 2021-12-02T23:42:09.57
IV.SMA1.EHN. ML:1.7 0.0001445304 1.3216 AML other m 2021-12-02T23:42:09.79
IV.ATCC.HNE. ML:1.6 0.00009950205999999999 0.128 AML other m 2021-12-02T23:42:09.86
IV.ATCC.EHE. ML:1.6 0.00010533363500000001 0.128 AML other m 2021-12-02T23:42:09.86
IV.ATCC.HNN. ML:1.6 0.00010982314999999999 1.552 AML other m 2021-12-02T23:42:10.80
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