Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-11-2020 and time 08:25:57 (UTC) in region 4 km E Sellano (PG)

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

  • 27-11-2020 08:25:57 (UTC)
  • 27-11-2020 09:25:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9, 12.97 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 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 10 1075 2878
Visso MC 10 1107 3985
Monte Cavallo MC 11 145 4130
Ussita MC 15 444 4574
Castelsantangelo sul Nera MC 15 281 4855
Norcia PG 15 4957 9812
Vallo di Nera PG 17 364 10176
Pieve Torina MC 18 1458 11634
Campello sul Clitunno PG 18 2442 14076
Trevi PG 18 8469 22545
Fiordimonte MC 19 202 22747
Serravalle di Chienti MC 20 1070 23817
Cascia PG 20 3217 27034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 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 1.5 2020-11-27
08:25:57		 42.9 12.97 11 2020-11-27
08:32:24		 Sala Sismica INGV-Roma 85045661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-27 08:25:57 ± 0.05
Latitude 42.90 ± 0.00
Longitude 12.97 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85045661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44337
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 85045661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-27 08:32:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RMP.HHZ. 2020-11-27T08:26:34.14 3.0 undecidable manual S 0.08 0
IV.SENI.HNZ. 2020-11-27T08:26:24.51 3.0 undecidable manual S -1.82 0
IV.EL6.EHZ. 2020-11-27T08:26:13.19 0.6 undecidable manual S 12 0.4434 50 0.43 43
IV.ARRO.EHE. 2020-11-27T08:26:10.12 0.6 undecidable manual S 206 0.3507 50 0.11 47
IV.SNTG.HHZ. 2020-11-27T08:26:10.66 0.6 undecidable manual S 356 0.3597 50 0.38 44
IV.SSFR.HHZ. 2020-11-27T08:26:08.36 3.0 undecidable manual P -0.1 0
IV.ASSB.HHZ. 2020-11-27T08:26:07.41 0.6 undecidable manual S 303 0.2725 50 -0.27 46
IV.MMO1.EHZ. 2020-11-27T08:26:07.16 0.3 undecidable manual S 89 0.2599 50 -0.15 71
IV.EL6.EHZ. 2020-11-27T08:26:06.02 0.1 undecidable manual P 12 0.4434 50 -0.11 92
IV.FDMO.HHZ. 2020-11-27T08:26:04.14 0.3 undecidable manual S 31 0.1637 120 -0.24 71
IV.SNTG.HHZ. 2020-11-27T08:26:04.62 0.3 undecidable manual P 356 0.3597 50 -0.07 71
IV.MC2.EHZ. 2020-11-27T08:26:04.48 0.6 undecidable manual S 84 0.1601 121 0.25 47
IV.ARRO.EHE. 2020-11-27T08:26:04.52 0.3 undecidable manual P 206 0.3507 50 -0.02 72
IV.ASSB.HHZ. 2020-11-27T08:26:03.10 0.1 undecidable manual P 303 0.2725 50 -0.09 96
IV.LNSS.HHZ. 2020-11-27T08:26:03.58 3.0 negative manual P -0.07 0
IV.CESI.HHZ. 2020-11-27T08:26:02.95 0.6 undecidable manual S 336 0.1196 129 -0.02 50
IV.MMO1.EHZ. 2020-11-27T08:26:02.89 0.3 negative manual P 89 0.2599 50 -0.09 72
IT.MTCL.HGZ. 2020-11-27T08:26:02.23 0.3 undecidable manual S 12 0.0998 134 -0.17 73
IV.NRCA.HHZ. 2020-11-27T08:26:02.99 0.3 undecidable manual S 121 0.1214 128 -0.03 75
IV.FDMO.HHZ. 2020-11-27T08:26:01.28 0.1 undecidable manual P 31 0.1637 120 -0.01 100
IV.MC2.EHZ. 2020-11-27T08:26:01.26 0.1 undecidable manual P 84 0.1601 121 0.06 99
IV.NRCA.HHZ. 2020-11-27T08:26:00.53 0.1 undecidable manual P 121 0.1214 128 0.03 100
IV.CESI.HHZ. 2020-11-27T08:26:00.67 0.1 undecidable manual P 336 0.1196 129 0.19 97
IT.MTCL.HGZ. 2020-11-27T08:26:00.25 0.1 undecidable manual P 12 0.0998 134 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.0005475 1.84 AML other m 2020-11-27T08:26:02.00
IV.NRCA.HHE. ML:1.7 0.0005795 0.16 AML other m 2020-11-27T08:26:03.17
IV.CESI.HHN. ML:1.6 0.0004175 0.18 AML other m 2020-11-27T08:26:03.24
IV.CESI.HHE. ML:1.5 0.000335 0.2 AML other m 2020-11-27T08:26:03.24
IV.FDMO.HHE. ML:1.7 0.000415 0.16 AML other m 2020-11-27T08:26:04.33
IV.FDMO.HHN. ML:1.6 0.000308 0.2 AML other m 2020-11-27T08:26:04.31
IV.ASSB.HHN. ML:1.4 0.00011735 0.26 AML other m 2020-11-27T08:26:07.91
IV.ASSB.HHE. ML:1.2 8.33E-5 0.22 AML other m 2020-11-27T08:26:08.12
IV.LNSS.HHN. ML:1.4 0.0001067 0.2 AML other m 2020-11-27T08:26:08.69
IV.LNSS.HHE. ML:1.4 0.00010315 1.38 AML other m 2020-11-27T08:26:09.96
IV.SNTG.HHE. ML:1.1 4.245E-5 0.14 AML other m 2020-11-27T08:26:11.15
IV.SNTG.HHN. ML:1.1 4.725E-5 0.64 AML other m 2020-11-27T08:26:11.89
IV.SSFR.HHN. ML:1.4 4.56E-5 0.18 AML other m 2020-11-27T08:26:18.98
IV.SSFR.HHE. ML:1.4 4.71E-5 0.2 AML other m 2020-11-27T08:26:19.47
IV.NRCA.HNE. ML:1.7 0.00054421535 0.16 AML other m 2020-11-27T08:26:03.16
IV.NRCA.HNN. ML:1.7 0.0005374421 0.16 AML other m 2020-11-27T08:26:03.00
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