Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 18-11-2021 and time 02:57:23 (Italy) in region 7 km NW Sellano (PG)

A magnitude ML 0.6 earthquake occured in region: 7 km NW Sellano (PG), on

  • 18-11-2021 01:57:23 (UTC)
  • 18-11-2021 02:57:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9360, 12.8650 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Sellano PG 7 1079 1079
Trevi PG 12 8469 9548
Monte Cavallo MC 13 145 9693
Foligno PG 13 57155 66848
Cerreto di Spoleto PG 14 1075 67923
Campello sul Clitunno PG 15 2442 70365
Preci PG 16 724 71089
Valtopina PG 16 1398 72487
Serravalle di Chienti MC 17 1070 73557
Spello PG 17 8645 82202
Montefalco PG 18 5679 87881
Visso MC 18 1107 88988
Vallo di Nera PG 18 364 89352
Pieve Torina MC 19 1458 90810

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Foligno (57155 inhabitants)
43 Km E of Perugia (166134 inhabitants)
45 Km NE of Terni (111501 inhabitants)
75 Km W of Teramo (54892 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
99 Km SE of Arezzo (99543 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
Reviewed
Rev100 		ML 0.6 2021-11-18
01:57:23		 42.9362 12.8652 12 2021-11-18
02:05:12		 Sala Sismica INGV-Roma 97537441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-18 01:57:23 ± 0.04
Latitude 42.9362 ± 0.0018
Longitude 12.8652 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97537441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 249
Semi-minor axis of confidence ellipse (meter) 90
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
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) 78
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 97537441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-18 02:05:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-11-18T01:57:33.70 0.3 undecidable manual S 175 27.1506 93 0 99
IV.MML1.EHZ. 2021-11-18T01:57:32.16 0.3 undecidable manual S 24 21.4674 95 -0.04 99
IV.NRCA.HHZ. 2021-11-18T01:57:32.52 0.3 undecidable manual S 119 23.2545 94 -0.13 98
IV.ASSB.HHZ. 2021-11-18T01:57:31.77 0.3 undecidable manual S 305 20.4684 96 -0.16 97
IV.FDMO.HHZ. 2021-11-18T01:57:31.95 0.3 undecidable manual S 58 21.1677 95 -0.16 97
IV.CSP1.EHZ. 2021-11-18T01:57:30.56 0.3 undecidable manual P 58 32.5452 92 0.14 95
IV.NRCA.HHZ. 2021-11-18T01:57:29.08 0.3 undecidable manual P 119 23.2545 94 0.09 98
IV.GAVE.EHZ. 2021-11-18T01:57:29.58 0.3 undecidable manual P 175 27.1506 93 -0.02 99
IV.MOMA.HNZ. 2021-11-18T01:57:29.65 0.3 undecidable manual P 239 28.1496 93 -0.1 97
IV.MML1.EHZ. 2021-11-18T01:57:28.86 0.3 undecidable manual P 24 21.4674 95 0.13 97
IV.CESI.HHZ. 2021-11-18T01:57:28.85 0.3 undecidable manual S 23 8.2806 133 -0.07 100
IV.ASSB.HHZ. 2021-11-18T01:57:28.65 0.3 undecidable manual P 305 20.4684 96 0.07 99
IV.FDMO.HHZ. 2021-11-18T01:57:28.68 0.3 undecidable manual P 58 21.1677 95 0 100
IV.CESI.HHZ. 2021-11-18T01:57:26.98 0.3 undecidable manual P 23 8.2806 133 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.7 0.000065386945 0.08 AML other m 2021-11-18T01:57:29.21
IV.CESI.HHN. ML:0.6 0.0000493043965 0.08 AML other m 2021-11-18T01:57:29.03
IV.MML1.EHE. ML:0.5 0.000018238235 0.1008 AML other m 2021-11-18T01:57:32.50
IV.MML1.EHN. ML:0.6 0.000023146354499999998 0.16 AML other m 2021-11-18T01:57:32.66
IV.NRCA.HHE. ML:0.7 0.000031898765000000005 0.0992 AML other m 2021-11-18T01:57:34.11
IV.NRCA.HHN. ML:0.8 0.0000417767965 0.1808 AML other m 2021-11-18T01:57:32.68
IV.GAVE.EHE. ML:0.6 0.00001874998 0.2 AML other m 2021-11-18T01:57:34.25
IV.GAVE.EHN. ML:0.6 0.000020496197500000002 0.28 AML other m 2021-11-18T01:57:34.95
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