Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 02-03-2021 and time 16:47:21 (UTC) in region 2 km SW Sellano (PG)

A magnitude ML 1.3 earthquake occured in region: 2 km SW Sellano (PG), on

  • 02-03-2021 16:47:21 (UTC)
  • 02-03-2021 17:47:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.88, 12.91 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 7 1075 2154
Preci PG 11 724 2878
Campello sul Clitunno PG 13 2442 5320
Vallo di Nera PG 13 364 5684
Trevi PG 13 8469 14153
Monte Cavallo MC 15 145 14298
Visso MC 16 1107 15405
Sant'Anatolia di Narco PG 17 564 15969
Norcia PG 18 4957 20926
Poggiodomo PG 19 117 21043
Foligno PG 19 57155 78198
Scheggino PG 20 461 78659
Cascia PG 20 3217 81876

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
49 Km SE of Perugia (166134 inhabitants)
69 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
99 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 1.3 2021-03-02
16:47:21		 42.88 12.91 10 2021-03-02
16:54:41		 Sala Sismica INGV-Roma 87629661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-02 16:47:21 ± 0.13
Latitude 42.88 ± 0.00
Longitude 12.91 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87629661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 840
Semi-minor axis of confidence ellipse (meter) 397
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 264
Circular confidence region, given by single value of horizontal uncertainty (meter) 840
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41818
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.7
Num. used stations 4
Type of magnitude ML
Reference to an origin 87629661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-02 16:54:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APPI.EHZ. 2021-03-02T16:49:16.53 3.0 undecidable manual Sg 5.83 0
IV.ZONE.HHZ. 2021-03-02T16:49:11.56 3.0 undecidable manual Sg 8.48 0
IV.SENA.HHZ. 2021-03-02T16:49:09.50 3.0 undecidable manual Sg 10.44 0
IV.SARZ.HHZ. 2021-03-02T16:48:56.83 3.0 undecidable manual Sn -5.02 0
IV.VOBA.EHZ. 2021-03-02T16:48:54.73 3.0 undecidable manual Sn -2.32 0
IV.CAVE.HHZ. 2021-03-02T16:48:40.34 3.0 undecidable manual Sg 3.98 0
GU.GRAM.HHZ. 2021-03-02T16:48:37.14 3.0 undecidable manual Sn -3.17 0
IV.GIZZ.HHZ. 2021-03-02T16:48:29.39 3.0 negative manual Pn -2.73 0
IV.PAOL.HHZ. 2021-03-02T16:48:28.41 3.0 undecidable manual Sg 0.25 0
IV.NOCI.HHZ. 2021-03-02T16:48:21.29 3.0 negative manual Pn 0.55 0
IV.PIGN.HHZ. 2021-03-02T16:48:19.37 3.0 undecidable manual Sn -1.33 0
IV.VAGA.HHZ. 2021-03-02T16:48:19.71 3.0 undecidable manual Sg 2.75 0
IV.CADC.EHZ. 2021-03-02T16:48:17.67 3.0 negative manual Pn 2.43 0
IV.IMOL.HNZ. 2021-03-02T16:48:16.34 3.0 undecidable manual Sg -2.88 0
IV.POFI.HHZ. 2021-03-02T16:48:05.20 3.0 undecidable manual S -0.23 0
IV.MCIV.CHZ. 2021-03-02T16:47:51.81 3.0 undecidable manual S -1.97 0
IV.CSP1.EHZ. 2021-03-02T16:47:33.12 0.6 undecidable manual S 45 0.3022 50 0.21 47
IV.SAP2.EHZ. 2021-03-02T16:47:29.02 1.0 positive manual P 59 0.4182 50 -0.98 18
IV.GAVE.EHZ. 2021-03-02T16:47:29.28 0.6 undecidable manual S 184 0.188 116 -0.12 49
IV.NRCA.HHZ. 2021-03-02T16:47:28.32 0.6 undecidable manual S 107 0.1565 121 -0.01 50
IV.CSP1.EHZ. 2021-03-02T16:47:28.02 0.6 undecidable manual P 45 0.3022 50 0.01 49
IV.CESI.HHZ. 2021-03-02T16:47:27.25 0.6 undecidable manual S 358 0.125 127 -0.08 50
IV.FDMO.HHZ. 2021-03-02T16:47:26.18 0.6 undecidable manual P 40 0.2032 115 -0.12 49
IV.GAVE.EHZ. 2021-03-02T16:47:26.09 0.3 positive manual P 184 0.188 116 0.1 74
IV.NRCA.HHZ. 2021-03-02T16:47:25.52 0.6 undecidable manual P 107 0.1565 121 0.15 49
IV.CESI.HHZ. 2021-03-02T16:47:24.88 0.1 positive manual P 358 0.125 127 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.7 3.875E-5 0.1 AML other m 2021-03-02T16:47:28.55
IV.NRCA.HHE. ML:0.7 4.695E-5 0.22 AML other m 2021-03-02T16:47:28.53
IV.SAP2.EHE. ML:1.7 0.0001414 0.32 AML other m 2021-03-02T16:47:46.68
IV.MCIV.CHE. ML:2.9 0.000875 0.12 AML other m 2021-03-02T16:47:57.12
IV.MCIV.CHN. ML:2.4 0.0002345 0.1 AML other m 2021-03-02T16:47:57.17
IV.SAP2.EHN. ML:2.2 0.000487 0.4 AML other m 2021-03-02T16:47:59.26
IV.VOBA.EHN. ML:3.4 0.000174 0.06 AML other m 2021-03-02T16:49:00.01
IV.VOBA.EHE. ML:3.3 0.0001455 0.16 AML other m 2021-03-02T16:49:01.18
IV.SARZ.HHE. ML:3.4 0.00015715 0.1 AML other m 2021-03-02T16:49:01.75
IV.SARZ.HHN. ML:3.5 0.000217 0.1 AML other m 2021-03-02T16:49:03.31
IV.ZONE.HHE. ML:3.1 7.545E-5 0.74 AML other m 2021-03-02T16:49:16.06
IV.APPI.EHN. ML:4 0.0004805 0.06 AML other m 2021-03-02T16:49:16.78
IV.APPI.EHE. ML:3.6 0.0002255 0.06 AML other m 2021-03-02T16:49:16.92
IV.ZONE.HHN. ML:2.9 5.645E-5 0.52 AML other m 2021-03-02T16:49:16.72
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