Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.3 on date 21-02-2021 and time 15:15:04 (UTC) in region 9 km NW Sellano (PG)

A magnitude ML 0.3 earthquake occured in region: 9 km NW Sellano (PG), on

  • 21-02-2021 15:15:04 (UTC)
  • 21-02-2021 16:15:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9670, 12.8780 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 10 1079 1079
Monte Cavallo MC 11 145 1224
Serravalle di Chienti MC 13 1070 2294
Foligno PG 14 57155 59449
Valtopina PG 14 1398 60847
Trevi PG 14 8469 69316
Preci PG 16 724 70040
Cerreto di Spoleto PG 17 1075 71115
Pieve Torina MC 17 1458 72573
Spello PG 17 8645 81218
Nocera Umbra PG 18 5839 87057
Visso MC 18 1107 88164
Campello sul Clitunno PG 18 2442 90606
Muccia MC 19 915 91521
Fiordimonte MC 19 202 91723
Pievebovigliana MC 20 866 92589

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
43 Km E of Perugia (166134 inhabitants)
49 Km NE of Terni (111501 inhabitants)
76 Km W of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
98 Km SE of Arezzo (99543 inhabitants)
98 Km S of Fano (60888 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 0.3 2021-02-21
15:15:04		 42.9668 12.8783 11 2021-02-21
15:26:18		 Sala Sismica INGV-Roma 87358271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-21 15:15:04 ± 0.16
Latitude 42.9668 ± 0.0108
Longitude 12.8783 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87358271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1178
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 354
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26890
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 87358271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-21 15:26:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.CARE.EHZ. 2021-02-21T15:16:47.31 3.0 undecidable manual Sg 13.17 0
IV.MILN.HNZ. 2021-02-21T15:16:28.93 3.0 undecidable manual Sn 0.54 0
GU.BHB.HHZ. 2021-02-21T15:16:04.13 3.0 undecidable manual Pn 3.94 0
GU.GRAM.HHZ. 2021-02-21T15:16:01.57 3.0 undecidable manual Sn 0 0
CR.ZAG.BHZ. 2021-02-21T15:16:00.10 3.0 undecidable manual Pn 4.92 0
IV.NDIM.HHZ. 2021-02-21T15:15:57.08 3.0 undecidable manual Sn -1.76 0
IV.TEOL.HHZ. 2021-02-21T15:15:36.12 3.0 undecidable manual Pn 0.7 0
IV.LRP.EHZ. 2021-02-21T15:15:28.81 3.0 undecidable manual Pn 0.48 0
IV.CSP1.EHZ. 2021-02-21T15:15:14.94 0.3 undecidable manual S 62 29.8479 50 0.05 74
IV.ASSB.HHZ. 2021-02-21T15:15:11.95 0.3 undecidable manual S 295 19.6692 118 -0.14 74
IV.MML1.HNN. 2021-02-21T15:15:11.61 0.3 undecidable manual S 25 17.9709 120 0.05 76
IV.FDMO.HHZ. 2021-02-21T15:15:11.42 0.3 undecidable manual S 65 18.6702 119 -0.34 71
IV.CSP1.EHZ. 2021-02-21T15:15:10.40 0.3 undecidable manual P 62 29.8479 50 -0.03 75
IV.FDMO.HHZ. 2021-02-21T15:15:08.66 1.0 undecidable manual P 65 18.6702 119 0.04 25
IV.CESI.HHZ. 2021-02-21T15:15:08.40 0.3 undecidable manual S 27 4.6953 156 0.05 78
IV.ASSB.HHZ. 2021-02-21T15:15:08.69 0.6 undecidable manual P 295 19.6692 118 -0.12 50
IV.MML1.HNN. 2021-02-21T15:15:08.67 0.6 undecidable manual P 25 17.9709 120 0.17 49
IV.CESI.HHZ. 2021-02-21T15:15:06.87 0.1 undecidable manual P 27 4.6953 156 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.4 0.00004485 0.2 AML other m 2021-02-21T15:15:08.53
IV.CESI.HHN. ML:0.5 0.00005045 0.1 AML other m 2021-02-21T15:15:08.54
IV.FDMO.HHE. ML:0.1 0.000007752650499999999 0.1408 AML other m 2021-02-21T15:15:11.67
IV.FDMO.HHN. ML:-0.2 0.0000061160825 0.0768 AML other m 2021-02-21T15:15:12.64
IV.CSP1.EHE. ML:0.3 0.000010500128000000001 0.1024 AML other m 2021-02-21T15:15:15.19
IV.CSP1.EHN. ML:0.5 0.000015596935000000002 0.1152 AML other m 2021-02-21T15:15:15.19
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