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) 42.87, 12.92 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.

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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
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
42.87 12.92 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 42.87 ± 0.00
Longitude 12.92 ± 0.00
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
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) 0.1313
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 Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-28T16:38:10.81 0.6 undecidable manual S 16 0.4766 50 0.8 38
IV.ATCC.EHZ. 2021-02-28T16:38:07.20 0.6 undecidable manual S 327 0.375 50 0.2 47
IV.CESX.HHN. 2021-02-28T16:38:06.85 0.6 undecidable manual S 223 0.3588 50 0.32 46
IV.CSP1.EHZ. 2021-02-28T16:38:04.60 0.6 undecidable manual S 43 0.3031 50 -0.27 47
IV.LNSS.HNN. 2021-02-28T16:38:04.16 0.6 undecidable manual S 162 0.2824 50 -0.09 49
IV.MOMA.HNE. 2021-02-28T16:38:03.90 0.6 undecidable manual S 255 0.2653 50 0.14 48
IV.EL6.EHZ. 2021-02-28T16:38:02.89 0.6 positive manual P 16 0.4766 50 -0.05 47
IV.FDMO.HHZ. 2021-02-28T16:38:01.77 0.6 undecidable manual S 36 0.205 115 -0.2 48
IV.GAVE.EHZ. 2021-02-28T16:38:01.24 0.6 undecidable manual S 186 0.1799 117 0.14 49
IV.MC2.EHZ. 2021-02-28T16:38:01.95 1.0 undecidable manual S 78 0.2005 115 0.14 24
IV.ATCC.EHZ. 2021-02-28T16:38:01.27 0.6 positive manual P 327 0.375 50 0.07 48
IV.CESX.HHN. 2021-02-28T16:38:00.56 0.1 undecidable manual P 223 0.3588 50 -0.37 90
IV.NRCA.HHZ. 2021-02-28T16:37:59.92 0.6 undecidable manual S 105 0.1466 123 -0.07 50
IV.ARRO.EHN. 2021-02-28T16:37:59.98 0.1 undecidable manual P 201 0.313 50 -0.17 95
IV.FEMA.HNN. 2021-02-28T16:37:59.50 0.6 undecidable manual S 46 0.1313 126 0.01 51
IV.CESI.HHZ. 2021-02-28T16:37:59.49 0.6 undecidable manual S 355 0.134 125 -0.09 50
IT.MTCL.HGN. 2021-02-28T16:37:59.23 0.6 undecidable manual S 25 0.1358 125 -0.4 47
IV.CSP1.EHZ. 2021-02-28T16:37:59.91 0.1 positive manual P 43 0.3031 50 -0.06 97
IV.MOMA.HNE. 2021-02-28T16:37:59.21 0.1 undecidable manual P 255 0.2653 50 -0.12 97
IV.LNSS.HNN. 2021-02-28T16:37:59.56 0.1 undecidable manual P 162 0.2824 50 -0.06 98
IV.MC2.EHZ. 2021-02-28T16:37:58.41 0.1 undecidable manual P 78 0.2005 115 0.2 97
IV.FDMO.HHZ. 2021-02-28T16:37:58.13 0.3 positive manual P 36 0.205 115 -0.17 73
IV.GAVE.EHZ. 2021-02-28T16:37:57.93 0.1 positive manual P 186 0.1799 117 0.14 98
IV.NRCA.HHZ. 2021-02-28T16:37:57.29 0.1 undecidable manual P 105 0.1466 123 0.14 99
IV.FEMA.HNN. 2021-02-28T16:37:57.05 0.1 undecidable manual P 46 0.1313 126 0.19 98
IV.CESI.HHZ. 2021-02-28T16:37:57.02 0.1 positive manual P 355 0.134 125 0.1 100
IT.MTCL.HGN. 2021-02-28T16:37:56.85 0.1 undecidable manual P 25 0.1358 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 4.14E-5 1.4 AML other m 2021-02-28T16:38:01.92
IV.GAVE.EHN. ML:1.1 8.3785E-5 0.64 AML other m 2021-02-28T16:38:02.26
IV.FDMO.HHN. ML:0.7 3.725E-5 0.94 AML other m 2021-02-28T16:38:03.18
IV.GAVE.EHE. ML:1 7.865E-5 1.16 AML other m 2021-02-28T16:38:03.24
IV.CSP1.EHE. ML:1.4 0.000113339335 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 4.4015215E-5 1.2416 AML other m 2021-02-28T16:38:08.03
IV.ATCC.EHN. ML:0.9 2.682264E-5 0.1408 AML other m 2021-02-28T16:38:07.92
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download