Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-02-2021 and time 17:37:53 (Italy) in region 2 km S Sellano (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km S Sellano (PG), on

  • 28-02-2021 16:37:53 (UTC)
  • 28-02-2021 17:37:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8710, 12.9200 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 2 1079 1079
Cerreto di Spoleto PG 6 1075 2154
Preci PG 10 724 2878
Vallo di Nera PG 12 364 3242
Campello sul Clitunno PG 13 2442 5684
Trevi PG 14 8469 14153
Monte Cavallo MC 15 145 14298
Visso MC 15 1107 15405
Norcia PG 17 4957 20362
Sant'Anatolia di Narco PG 17 564 20926
Poggiodomo PG 18 117 21043
Cascia PG 19 3217 24260
Scheggino PG 19 461 24721
Castelsantangelo sul Nera MC 19 281 25002
Ussita MC 20 444 25446
Foligno PG 20 57155 82601

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
68 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
98 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
Reviewed
Rev100 		ML 1.1 2021-02-28
16:37:53		 42.8712 12.9205 10 2021-02-28
16:58:23		 Sala Sismica INGV-Roma 87577351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 16:37:53 ± 0.05
Latitude 42.8712 ± 0.0027
Longitude 12.9205 ± 0.0049
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 87577351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 398
Semi-minor axis of confidence ellipse (meter) 265
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
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) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.13130
Epicentral distance of station farthest from the epicenter (degree) 0.47664
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:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 87577351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 16:58:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-28T16:38:10.81 0.6 undecidable manual S 16 52.9026 50 0.8 38
IV.ATCC.EHZ. 2021-02-28T16:38:07.20 0.6 undecidable manual S 327 41.625 50 0.2 47
IV.CESX.HHN. 2021-02-28T16:38:06.85 0.6 undecidable manual S 223 39.8268 50 0.32 46
IV.LNSS.HNN. 2021-02-28T16:38:04.16 0.6 undecidable manual S 162 31.3464 50 -0.09 49
IV.CSP1.EHZ. 2021-02-28T16:38:04.60 0.6 undecidable manual S 43 33.6441 50 -0.27 47
IV.MOMA.HNE. 2021-02-28T16:38:03.90 0.6 undecidable manual S 255 29.4483 50 0.14 48
IV.EL6.EHZ. 2021-02-28T16:38:02.89 0.6 positive manual P 16 52.9026 50 -0.05 47
IV.GAVE.EHZ. 2021-02-28T16:38:01.24 0.6 undecidable manual S 186 19.9689 117 0.14 49
IV.MC2.EHZ. 2021-02-28T16:38:01.95 1.0 undecidable manual S 78 22.2555 115 0.14 24
IV.ATCC.EHZ. 2021-02-28T16:38:01.27 0.6 positive manual P 327 41.625 50 0.07 48
IV.FDMO.HHZ. 2021-02-28T16:38:01.77 0.6 undecidable manual S 36 22.755 115 -0.2 48
IV.CESX.HHN. 2021-02-28T16:38:00.56 0.1 undecidable manual P 223 39.8268 50 -0.37 90
IV.CESI.HHZ. 2021-02-28T16:37:59.49 0.6 undecidable manual S 355 14.874 125 -0.09 50
IT.MTCL.HGN. 2021-02-28T16:37:59.23 0.6 undecidable manual S 25 15.0738 125 -0.4 47
IV.CSP1.EHZ. 2021-02-28T16:37:59.91 0.1 positive manual P 43 33.6441 50 -0.06 97
IV.MOMA.HNE. 2021-02-28T16:37:59.21 0.1 undecidable manual P 255 29.4483 50 -0.12 97
IV.LNSS.HNN. 2021-02-28T16:37:59.56 0.1 undecidable manual P 162 31.3464 50 -0.06 98
IV.NRCA.HHZ. 2021-02-28T16:37:59.92 0.6 undecidable manual S 105 16.2726 123 -0.07 50
IV.ARRO.EHN. 2021-02-28T16:37:59.98 0.1 undecidable manual P 201 34.743 50 -0.17 95
IV.FEMA.HNN. 2021-02-28T16:37:59.50 0.6 undecidable manual S 46 14.5743 126 0.01 51
IV.FDMO.HHZ. 2021-02-28T16:37:58.13 0.3 positive manual P 36 22.755 115 -0.17 73
IV.MC2.EHZ. 2021-02-28T16:37:58.41 0.1 undecidable manual P 78 22.2555 115 0.2 97
IV.NRCA.HHZ. 2021-02-28T16:37:57.29 0.1 undecidable manual P 105 16.2726 123 0.14 99
IV.FEMA.HNN. 2021-02-28T16:37:57.05 0.1 undecidable manual P 46 14.5743 126 0.19 98
IV.CESI.HHZ. 2021-02-28T16:37:57.02 0.1 positive manual P 355 14.874 125 0.1 100
IV.GAVE.EHZ. 2021-02-28T16:37:57.93 0.1 positive manual P 186 19.9689 117 0.14 98
IT.MTCL.HGN. 2021-02-28T16:37:56.85 0.1 undecidable manual P 25 15.0738 125 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.000246 0.5 AML other m 2021-02-28T16:37:59.71
IV.CESI.HHE. ML:1.1 0.0001305 0.84 AML other m 2021-02-28T16:38:00.14
IV.FDMO.HHE. ML:0.8 0.0000414 1.4 AML other m 2021-02-28T16:38:01.92
IV.GAVE.EHN. ML:1.1 0.000083785 0.64 AML other m 2021-02-28T16:38:02.26
IV.FDMO.HHN. ML:0.7 0.00003725 0.94 AML other m 2021-02-28T16:38:03.18
IV.GAVE.EHE. ML:1.0 0.00007865 1.16 AML other m 2021-02-28T16:38:03.24
IV.CSP1.EHE. ML:1.4 0.00011333933499999998 1.1008 AML other m 2021-02-28T16:38:05.20
IV.CSP1.EHN. ML:1.4 0.00010954003 1.2288 AML other m 2021-02-28T16:38:05.50
IV.ATCC.EHE. ML:1.1 0.000044015215 1.2416 AML other m 2021-02-28T16:38:08.03
IV.ATCC.EHN. ML:0.9 0.00002682264 0.1408 AML other m 2021-02-28T16:38:07.92
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