Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 03-10-2021 and time 14:23:49 (Italy) in region 4 km E Sellano (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km E Sellano (PG), on

  • 03-10-2021 12:23:49 (UTC)
  • 03-10-2021 14:23:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8900, 12.9720 at 10 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 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 9 1075 2878
Visso MC 11 1107 3985
Monte Cavallo MC 12 145 4130
Norcia PG 15 4957 9087
Castelsantangelo sul Nera MC 15 281 9368
Ussita MC 15 444 9812
Vallo di Nera PG 16 364 10176
Campello sul Clitunno PG 18 2442 12618
Trevi PG 18 8469 21087
Pieve Torina MC 19 1458 22545
Fiordimonte MC 19 202 22747
Cascia PG 19 3217 25964
Poggiodomo PG 20 117 26081

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
92 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 1.2 2021-10-03
12:23:49		 42.8897 12.9717 10 2021-10-03
12:43:54		 Sala Sismica INGV-Roma 96169391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-03 12:23:49 ± 0.07
Latitude 42.8897 ± 0.0036
Longitude 12.9717 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96169391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 304
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
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 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.44966
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96169391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-03 12:43:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-10-03T12:24:05.47 0.6 undecidable manual S 12 49.9167 50 0.28 44
IV.MF5.EHZ. 2021-10-03T12:24:03.63 0.3 undecidable manual S 74 41.1255 50 0.79 57
IV.MOMA.HNN. 2021-10-03T12:24:01.36 0.6 undecidable manual S 254 34.0437 50 0.41 44
IV.LNSS.HHZ. 2021-10-03T12:24:00.14 0.3 undecidable manual S 170 32.3454 50 -0.35 67
IV.ASSB.HHE. 2021-10-03T12:23:59.95 0.3 undecidable manual S 304 30.5472 50 -0.07 72
IV.CSP1.EHZ. 2021-10-03T12:23:59.33 0.3 undecidable manual S 40 29.3484 50 -0.37 68
IV.EL6.EHZ. 2021-10-03T12:23:58.23 0.3 undecidable manual P 12 49.9167 50 -0.17 68
IV.MML1.EHZ. 2021-10-03T12:23:58.19 0.3 undecidable manual S 360 24.8529 112 -0.21 70
IV.GAVE.EHZ. 2021-10-03T12:23:57.70 0.3 undecidable manual S 196 22.755 113 -0.06 73
IV.MF5.EHZ. 2021-10-03T12:23:57.24 0.1 undecidable manual P 74 41.1255 50 0.19 92
IV.MOMA.HNN. 2021-10-03T12:23:56.59 0.3 undecidable manual P 254 34.0437 50 0.63 62
IV.FDMO.HHZ. 2021-10-03T12:23:56.26 0.3 undecidable manual S 30 18.7701 118 -0.23 71
IV.LNSS.HHZ. 2021-10-03T12:23:55.35 0.1 undecidable manual P 170 32.3454 50 -0.34 90
IV.ASSB.HHE. 2021-10-03T12:23:55.02 0.3 undecidable manual P 304 30.5472 50 -0.4 67
IV.FEMA.HNZ. 2021-10-03T12:23:54.09 0.3 undecidable manual S 38 10.1787 134 0.03 75
IV.GAVE.EHZ. 2021-10-03T12:23:54.08 0.1 undecidable manual P 196 22.755 113 -0.03 98
IT.MTCL.HGZ. 2021-10-03T12:23:54.23 0.1 undecidable manual S 11 11.7771 130 -0.23 96
IV.NRCA.HHZ. 2021-10-03T12:23:54.63 0.3 undecidable manual S 118 13.1757 127 -0.21 72
IV.CSP1.EHZ. 2021-10-03T12:23:54.92 0.1 undecidable manual P 40 29.3484 50 -0.31 91
IV.MML1.EHZ. 2021-10-03T12:23:54.33 0.3 undecidable manual P 360 24.8529 112 -0.16 71
IV.CESI.HHZ. 2021-10-03T12:23:54.98 0.3 undecidable manual S 337 13.875 125 -0.06 74
IV.MC2.EHZ. 2021-10-03T12:23:53.48 0.3 undecidable manual P 82 17.7711 119 0.27 70
IV.FDMO.HHZ. 2021-10-03T12:23:53.30 0.1 undecidable manual P 30 18.7701 118 -0.09 97
IV.NRCA.HHZ. 2021-10-03T12:23:52.43 0.1 undecidable manual P 118 13.1757 127 0 100
IV.CESI.HHZ. 2021-10-03T12:23:52.80 0.1 undecidable manual P 337 13.875 125 0.25 95
IV.FEMA.HNZ. 2021-10-03T12:23:52.58 0.1 undecidable manual P 38 10.1787 134 0.6 87
IT.MTCL.HGZ. 2021-10-03T12:23:52.47 0.1 undecidable manual P 11 11.7771 130 0.26 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.00035450000000000005 0.14 AML other m 2021-10-03T12:23:54.76
IV.NRCA.HHE. ML:1.5 0.0003705 0.1 AML other m 2021-10-03T12:23:54.89
IV.CESI.HHE. ML:1.1 0.0001385 0.14 AML other m 2021-10-03T12:23:55.39
IV.CESI.HHN. ML:1.4 0.000236 0.34 AML other m 2021-10-03T12:23:55.40
IV.GAVE.EHE. ML:1.1 0.0000789 1.7 AML other m 2021-10-03T12:23:58.07
IV.GAVE.EHN. ML:0.9 0.00005625 0.22 AML other m 2021-10-03T12:23:58.21
IV.MML1.EHE. ML:1.0 0.0000617 0.14 AML other m 2021-10-03T12:23:58.43
IV.MML1.EHN. ML:1.1 0.00007944999999999999 0.16 AML other m 2021-10-03T12:23:58.51
IV.LNSS.HHN. ML:1.0 0.0000431 0.42 AML other m 2021-10-03T12:24:00.40
IV.LNSS.HHE. ML:0.9 0.00003465 0.8 AML other m 2021-10-03T12:24:00.83
IV.NRCA.HNE. ML:1.5 0.0003437378 0.1024 AML other m 2021-10-03T12:23:54.90
IV.NRCA.HNN. ML:1.5 0.0003541623 0.1536 AML other m 2021-10-03T12:23:54.76
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