Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-11-2021 and time 02:24:11 (UTC) in region 6 km NW Sellano (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km NW Sellano (PG), on

  • 21-11-2021 02:24:11 (UTC)
  • 21-11-2021 03:24:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9420, 12.8980 at 11 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 6 1079 1079
Monte Cavallo MC 10 145 1224
Preci PG 13 724 1948
Cerreto di Spoleto PG 14 1075 3023
Trevi PG 14 8469 11492
Serravalle di Chienti MC 15 1070 12562
Visso MC 16 1107 13669
Foligno PG 16 57155 70824
Campello sul Clitunno PG 17 2442 73266
Pieve Torina MC 17 1458 74724
Valtopina PG 18 1398 76122
Fiordimonte MC 19 202 76324
Spello PG 19 8645 84969
Vallo di Nera PG 19 364 85333
Ussita MC 20 444 85777
Muccia MC 20 915 86692

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Foligno (57155 inhabitants)
45 Km E of Perugia (166134 inhabitants)
47 Km NE of Terni (111501 inhabitants)
73 Km W of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
90 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
Reviewed
Rev100 		ML 1.0 2021-11-21
02:24:11		 42.9423 12.8985 11 2021-11-21
02:30:07		 Sala Sismica INGV-Roma 97645901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 02:24:11 ± 0.05
Latitude 42.9423 ± 0.0027
Longitude 12.8985 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97645901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
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) 82
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41459
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 97645901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 02:30:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-11-21T02:24:30.04 3.0 undecidable manual P 0.26 0
IV.ATCC.EHZ. 2021-11-21T02:24:22.90 0.1 undecidable manual S 322 34.1436 50 0.02 96
IV.MOMA.HHZ. 2021-11-21T02:24:22.09 0.1 undecidable manual S 240 30.8469 50 0.09 95
IV.GAVE.EHZ. 2021-11-21T02:24:21.05 0.1 undecidable manual S 181 27.75 50 -0.13 95
IV.CSP1.EHZ. 2021-11-21T02:24:21.82 0.1 undecidable manual S 56 29.8479 50 0.07 95
IV.MC2.EHZ. 2021-11-21T02:24:20.48 0.1 undecidable manual S 98 23.8539 50 0.34 91
IV.NRCA.HHZ. 2021-11-21T02:24:19.25 0.1 undecidable manual S 124 21.2676 50 -0.21 94
IV.EL6.EHZ. 2021-11-21T02:24:19.84 0.6 negative manual P 21 46.0206 50 0.04 47
IV.SNTG.HHZ. 2021-11-21T02:24:18.06 0.6 undecidable manual P 6 34.8429 50 -0.03 48
IV.FDMO.HHZ. 2021-11-21T02:24:18.50 0.1 undecidable manual S 56 18.5703 120 -0.22 94
IV.MMO1.EHZ. 2021-11-21T02:24:18.15 1.0 undecidable manual P 98 35.1426 50 0.02 24
IV.MML1.EHZ. 2021-11-21T02:24:18.94 0.1 undecidable manual S 17 19.869 50 -0.14 96
IV.CSP1.EHZ. 2021-11-21T02:24:17.28 0.6 positive manual P 56 29.8479 50 -0.04 48
IV.MOMA.HHZ. 2021-11-21T02:24:17.42 0.6 negative manual P 240 30.8469 50 -0.04 48
IV.ATCC.EHZ. 2021-11-21T02:24:17.87 0.1 negative manual P 322 34.1436 50 -0.1 94
IV.MC2.EHZ. 2021-11-21T02:24:16.59 0.1 undecidable manual P 98 23.8539 50 0.2 94
IV.GAVE.EHZ. 2021-11-21T02:24:16.96 0.6 negative manual P 181 27.75 50 -0.03 48
IV.FDMO.HHZ. 2021-11-21T02:24:15.54 0.3 positive manual P 56 18.5703 120 -0.03 74
IV.MML1.EHZ. 2021-11-21T02:24:15.77 1.0 positive manual P 17 19.869 50 -0.01 25
IV.CESI.HHZ. 2021-11-21T02:24:15.77 0.1 undecidable manual S 4 6.993 147 0.03 100
IV.NRCA.HHZ. 2021-11-21T02:24:15.92 0.1 negative manual P 124 21.2676 50 -0.08 97
IV.CESI.HHZ. 2021-11-21T02:24:14.05 0.1 positive manual P 4 6.993 147 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.9 0.0001175 0.1 AML other m 2021-11-21T02:24:15.85
IV.CESI.HHE. ML:0.9 0.00010915 1.66 AML other m 2021-11-21T02:24:16.90
IV.FDMO.HHN. ML:0.8 0.000049250000000000004 0.14 AML other m 2021-11-21T02:24:18.82
IV.FDMO.HHE. ML:0.8 0.00005145 0.12 AML other m 2021-11-21T02:24:19.13
IV.MML1.EHN. ML:1.0 0.00007535 0.18 AML other m 2021-11-21T02:24:19.28
IV.MML1.EHE. ML:1.2 0.000113 0.14 AML other m 2021-11-21T02:24:19.28
IV.NRCA.HHN. ML:1.0 0.00006665000000000001 0.12 AML other m 2021-11-21T02:24:19.47
IV.NRCA.HHE. ML:0.9 0.000050299999999999996 0.16 AML other m 2021-11-21T02:24:20.16
IV.GAVE.EHN. ML:1.2 0.0000849 0.6 AML other m 2021-11-21T02:24:21.50
IV.GAVE.EHE. ML:1.2 0.00008999999999999999 0.5 AML other m 2021-11-21T02:24:21.69
IV.CSP1.EHN. ML:1.2 0.0000691 0.54 AML other m 2021-11-21T02:24:22.12
IV.CSP1.EHE. ML:1.2 0.00008010000000000001 0.28 AML other m 2021-11-21T02:24:22.20
IV.MOMA.HHN. ML:0.6 0.0000202 0.18 AML other m 2021-11-21T02:24:22.72
IV.MOMA.HHE. ML:0.6 0.000021649999999999998 0.14 AML other m 2021-11-21T02:24:23.30
IV.MMO1.EHN. ML:1.3 0.00007625000000000001 1.08 AML other m 2021-11-21T02:24:23.02
IV.MMO1.EHE. ML:0.9 0.00003073 0.94 AML other m 2021-11-21T02:24:24.68
IV.SNTG.HHN. ML:0.6 0.00001525 0.82 AML other m 2021-11-21T02:24:25.40
IV.SNTG.HHE. ML:0.6 0.00001295 0.58 AML other m 2021-11-21T02:24:27.53
IV.CPGN.EHN. ML:1.9 0.000071335 0.42 AML other m 2021-11-21T02:24:55.24
IV.CPGN.EHE. ML:1.6 0.00003749999999999999 0.42 AML other m 2021-11-21T02:24:57.41
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