Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-02-2021 and time 06:30:07 (Italy) in region 4 km E Sellano (PG)

A magnitude ML 1.5 earthquake occured in region: 4 km E Sellano (PG), on

  • 20-02-2021 05:30:07 (UTC)
  • 20-02-2021 06:30:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8850, 12.9710 at 10 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
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 14 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 17 2442 12618
Trevi PG 18 8469 21087
Cascia PG 19 3217 24304
Pieve Torina MC 19 1458 25762
Poggiodomo PG 19 117 25879
Fiordimonte MC 20 202 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)
93 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 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 1.5 2021-02-20
05:30:07		 42.8852 12.9713 10 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91395561
Reviewed
Rev100 		ML 1.5 2021-02-20
05:30:07		 42.8882 12.9672 11 2021-02-20
05:35:40		 Sala Sismica INGV-Roma 87315301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-20 05:30:07 ± 0.03
Latitude 42.8852 ± 0.0018
Longitude 12.9713 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91395561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 229
Semi-minor axis of confidence ellipse (meter) 186
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.61334
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 91395561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-16 12:50:56

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 87315301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-20 05:35:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2021-02-20T05:30:21.87 0.6 undecidable manual S 321 42.7239 50 0.23 46
IV.ARRO.EHZ. 2021-02-20T05:30:20.49 0.6 undecidable manual S 206 37.8288 50 0.17 47
IV.GUMA.HHZ. 2021-02-20T05:30:20.25 0.6 undecidable manual S 56 35.5422 50 0.55 44
IV.MOMA.HHZ. 2021-02-20T05:30:19.50 0.6 undecidable manual S 255 33.8439 50 0.24 47
IV.ARVD.HHZ. 2021-02-20T05:30:19.53 0.3 undecidable manual P 358 68.0763 50 -0.07 68
IV.ASSB.HHZ. 2021-02-20T05:30:18.23 0.6 undecidable manual S 305 30.8469 50 -0.21 47
IV.LNSS.HHZ. 2021-02-20T05:30:18.63 0.6 undecidable manual S 170 31.8459 50 -0.08 48
IV.CSP1.EHZ. 2021-02-20T05:30:18.00 0.6 undecidable manual S 39 29.748 50 -0.16 48
IV.MURB.HHZ. 2021-02-20T05:30:17.65 0.3 undecidable manual P 319 55.4001 50 0 71
IV.MMO1.EHZ. 2021-02-20T05:30:17.72 0.6 undecidable manual S 87 28.9488 50 -0.22 47
IV.RM33.EHZ. 2021-02-20T05:30:16.03 0.3 undecidable manual P 155 46.2204 50 -0.2 69
IT.FOPC.HGN. 2021-02-20T05:30:16.84 0.6 undecidable manual S 293 23.754 50 0.29 47
IV.EL6.EHZ. 2021-02-20T05:30:16.78 0.1 undecidable manual P 12 50.4162 50 -0.1 93
IV.GAVE.EHZ. 2021-02-20T05:30:15.99 0.6 undecidable manual S 196 22.2555 115 -0.14 49
IV.MF5.EHZ. 2021-02-20T05:30:15.86 0.3 undecidable manual P 74 41.2254 50 0.39 67
IV.ATCC.EHZ. 2021-02-20T05:30:15.61 0.1 undecidable manual P 321 42.7239 50 -0.1 95
IV.CESX.HHZ. 2021-02-20T05:30:15.66 0.3 undecidable manual P 226 43.8228 50 -0.21 69
IV.MOMA.HHZ. 2021-02-20T05:30:14.63 0.1 undecidable manual P 255 33.8439 50 0.3 93
IV.FDMO.HHZ. 2021-02-20T05:30:14.91 0.6 undecidable manual S 29 19.2696 118 -0.28 48
IV.GUMA.HHZ. 2021-02-20T05:30:14.79 0.1 undecidable manual P 56 35.5422 50 0.2 94
IV.ARRO.EHZ. 2021-02-20T05:30:14.84 0.3 undecidable manual P 206 37.8288 50 -0.11 72
IV.MC2.EHZ. 2021-02-20T05:30:14.91 0.3 undecidable manual S 81 17.9709 120 0.13 74
IV.MMO1.EHZ. 2021-02-20T05:30:13.50 0.1 undecidable manual P 87 28.9488 50 -0.07 97
IV.CSP1.EHZ. 2021-02-20T05:30:13.60 0.1 undecidable manual P 39 29.748 50 -0.1 97
IV.NRCA.HHZ. 2021-02-20T05:30:13.31 0.6 undecidable manual S 116 12.9759 129 -0.05 51
IV.ASSB.HHZ. 2021-02-20T05:30:13.63 0.1 positive manual P 305 30.8469 50 -0.23 94
IV.CESI.HHZ. 2021-02-20T05:30:13.58 0.6 undecidable manual S 338 14.3745 126 -0.16 50
IV.LNSS.HHZ. 2021-02-20T05:30:13.85 0.1 undecidable manual P 170 31.8459 50 -0.17 95
IT.MTCL.HGZ. 2021-02-20T05:30:12.85 0.6 undecidable manual S 11 12.2766 130 -0.32 48
IV.FEMA.HNE. 2021-02-20T05:30:12.74 0.6 undecidable manual S 37 10.6782 134 -0.02 51
IT.FOPC.HGN. 2021-02-20T05:30:12.94 0.3 undecidable manual P 293 23.754 50 0.17 72
IV.GAVE.EHZ. 2021-02-20T05:30:12.54 0.1 positive manual P 196 22.2555 115 0.01 100
IV.CESI.HHZ. 2021-02-20T05:30:11.21 0.1 undecidable manual P 338 14.3745 126 0.06 100
IV.MC2.EHZ. 2021-02-20T05:30:11.80 0.1 undecidable manual P 81 17.9709 120 0.05 100
IV.FDMO.HHZ. 2021-02-20T05:30:11.92 0.1 positive manual P 29 19.2696 118 -0.06 100
IV.NRCA.HHZ. 2021-02-20T05:30:11.02 0.1 negative manual P 116 12.9759 129 0.1 100
IV.FEMA.HNE. 2021-02-20T05:30:10.73 0.1 undecidable manual P 37 10.6782 134 0.15 99
IT.MTCL.HGZ. 2021-02-20T05:30:10.85 0.3 undecidable manual P 11 12.2766 130 0.03 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.1 0.0012749999999999999 0.12 AML other m 2021-02-20T05:30:13.43
IV.NRCA.HHN. ML:2.1 0.001345 0.12 AML other m 2021-02-20T05:30:13.43
IV.CESI.HHE. ML:1.6 0.00036550000000000005 0.1 AML other m 2021-02-20T05:30:13.84
IV.CESI.HNE. ML:1.5 0.0003235 0.12 AML other m 2021-02-20T05:30:13.79
IV.CESI.HNN. ML:1.8 0.000658 1.4 AML other m 2021-02-20T05:30:13.85
IV.CESI.HHN. ML:1.8 0.0006405000000000001 1.4 AML other m 2021-02-20T05:30:13.85
IV.NRCA.HHE. ML:1.9 0.0008774999999999999 0.12 AML other m 2021-02-20T05:30:14.20
IV.NRCA.HNE. ML:1.9 0.0008365 0.12 AML other m 2021-02-20T05:30:14.20
IV.FDMO.HHN. ML:1.6 0.00026949999999999994 0.98 AML other m 2021-02-20T05:30:15.53
IV.FDMO.HHE. ML:2.0 0.000716 0.38 AML other m 2021-02-20T05:30:15.06
IV.GAVE.EHE. ML:1.5 0.00019250000000000002 0.2 AML other m 2021-02-20T05:30:16.34
IV.GAVE.EHN. ML:1.5 0.00020400000000000003 1.06 AML other m 2021-02-20T05:30:17.53
IV.ASSB.HHE. ML:1.2 0.00007245 0.54 AML other m 2021-02-20T05:30:18.68
IV.ASSB.HHN. ML:1.2 0.00007835000000000001 0.38 AML other m 2021-02-20T05:30:18.45
IV.CSP1.EHE. ML:1.8 0.000345 0.2 AML other m 2021-02-20T05:30:18.70
IV.LNSS.HHE. ML:1.4 0.000117 0.12 AML other m 2021-02-20T05:30:18.82
IV.LNSS.HHN. ML:1.4 0.0001185 1.74 AML other m 2021-02-20T05:30:19.11
IV.CSP1.EHN. ML:1.8 0.0003035 0.7 AML other m 2021-02-20T05:30:19.30
IV.GUMA.HHE. ML:1.7 0.00020250000000000002 0.26 AML other m 2021-02-20T05:30:20.47
IV.MOMA.HHE. ML:1.3 0.00008030000000000001 0.46 AML other m 2021-02-20T05:30:21.71
IV.ATCC.EHN. ML:1.2 0.00005205 0.28 AML other m 2021-02-20T05:30:22.36
IV.GUMA.HHN. ML:1.4 0.0001073 0.52 AML other m 2021-02-20T05:30:22.38
IV.MOMA.HHN. ML:1.0 0.0000459 1.36 AML other m 2021-02-20T05:30:23.86
IV.ATCC.EHE. ML:1.2 0.000046899999999999995 0.12 AML other m 2021-02-20T05:30:23.34
IV.CESX.HHE. ML:1.2 0.00005375 0.64 AML other m 2021-02-20T05:30:24.27
IV.RM33.EHN. ML:0.9 0.000025799999999999997 0.24 AML other m 2021-02-20T05:30:24.56
IV.CESX.HHN. ML:1.2 0.000056099999999999995 0.34 AML other m 2021-02-20T05:30:24.67
IV.RM33.EHE. ML:1.0 0.0000292 0.42 AML other m 2021-02-20T05:30:26.25
IV.MURB.HHE. ML:1.4 0.0000554 1.72 AML other m 2021-02-20T05:30:30.02
IV.MURB.HHN. ML:1.2 0.000041099999999999996 0.3 AML other m 2021-02-20T05:30:30.95
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