Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 27-11-2020 and time 14:29:56 (Italy) in region 4 km NE Sigillo (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NE Sigillo (PG), on

  • 27-11-2020 13:29:56 (UTC)
  • 27-11-2020 14:29:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.36, 12.76 at 13 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
Sigillo PG 4 2404 2404
Costacciaro PG 4 1216 3620
Fossato di Vico PG 8 2840 6460
Scheggia e Pascelupo PG 9 1393 7853
Sassoferrato AN 11 7285 15138
Fabriano AN 12 31480 46618
Serra Sant'Abbondio PU 14 1027 47645
Gualdo Tadino PG 15 15208 62853
Gubbio PG 15 32216 95069
Genga AN 16 1797 96866
Cantiano PU 17 2245 99111
Frontone PU 17 1300 100411
Cerreto d'Esi AN 19 3817 104228
Esanatoglia MC 19 2034 106262

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NE of Perugia (166134 inhabitants)
45 Km N of Foligno (57155 inhabitants)
57 Km SW of Fano (60888 inhabitants)
62 Km S of Pesaro (94582 inhabitants)
67 Km W of Ancona (100861 inhabitants)
72 Km E of Arezzo (99543 inhabitants)
79 Km S of Rimini (147750 inhabitants)
90 Km N of Terni (111501 inhabitants)
96 Km SE of Cesena (96758 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 1.0 2020-11-27
13:29:56		 43.36 12.76 13 2020-11-27
13:41:59		 Sala Sismica INGV-Roma 85051251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-27 13:29:56 ± 0.07
Latitude 43.36 ± 0.00
Longitude 12.76 ± 0.00
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85051251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 411
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 224
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 0.41908
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 85051251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-27 13:41:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-11-27T13:30:12.30 0.6 undecidable manual S 144 0.402 93 1.35 30
IV.MPAG.EHZ. 2020-11-27T13:30:07.10 0.6 undecidable manual S 359 0.2662 96 0.15 47
IV.EL6.EHZ. 2020-11-27T13:30:06.60 0.6 undecidable manual S 98 0.2473 97 0.22 47
IV.ATVO.HHZ. 2020-11-27T13:30:06.61 0.6 undecidable manual S 274 0.2608 97 -0.18 47
IV.MURB.HHZ. 2020-11-27T13:30:05.31 0.6 undecidable manual S 240 0.2014 101 0.27 46
IV.CSP1.EHZ. 2020-11-27T13:30:05.38 0.1 undecidable manual P 130 0.4191 93 0.2 91
IV.FDMO.HHZ. 2020-11-27T13:30:04.53 0.1 undecidable manual P 144 0.402 93 -0.34 87
IV.ARVD.HHZ. 2020-11-27T13:30:04.64 0.6 undecidable manual S 43 0.1862 103 0.02 49
IV.ATFO.HHZ. 2020-11-27T13:30:03.33 0.6 undecidable manual S 272 0.1403 113 0.01 49
IV.FRON.EHZ. 2020-11-27T13:30:03.81 0.3 undecidable manual S 350 0.1574 108 0.02 74
IV.SNTG.HHZ. 2020-11-27T13:30:03.84 0.3 undecidable manual S 130 0.1673 106 -0.22 71
IV.ATVO.HHZ. 2020-11-27T13:30:02.36 0.1 undecidable manual P 274 0.2608 97 -0.11 95
IV.MPAG.EHZ. 2020-11-27T13:30:02.58 0.1 undecidable manual P 359 0.2662 96 0.01 97
IV.ATSC.EHZ. 2020-11-27T13:30:02.01 0.6 undecidable manual S 317 0.0836 134 0.1 49
IV.EL6.EHZ. 2020-11-27T13:30:02.17 0.1 undecidable manual P 98 0.2473 97 -0.07 95
IV.SSFR.HNZ. 2020-11-27T13:30:01.77 0.6 undecidable manual S 10 0.0746 138 0.05 49
IV.ARVD.HHZ. 2020-11-27T13:30:01.21 0.1 undecidable manual P 43 0.1862 103 -0.01 98
IV.MURB.HHZ. 2020-11-27T13:30:01.45 0.1 undecidable manual P 240 0.2014 101 -0.01 98
IV.FOSV.EHZ. 2020-11-27T13:30:01.51 0.6 undecidable manual S 182 0.0674 142 -0.08 50
IV.SNTG.HHZ. 2020-11-27T13:30:00.75 0.1 undecidable manual P 130 0.1673 106 -0.14 95
IV.ATFO.HHZ. 2020-11-27T13:30:00.40 0.1 undecidable manual P 272 0.1403 113 -0.07 98
IV.FRON.EHZ. 2020-11-27T13:30:00.67 0.1 undecidable manual P 350 0.1574 108 -0.07 98
IV.FOSV.EHZ. 2020-11-27T13:29:59.42 0.1 undecidable manual P 182 0.0674 142 -0.05 100
IV.SSFR.HNZ. 2020-11-27T13:29:59.64 0.1 undecidable manual P 10 0.0746 138 0.09 98
IV.ATSC.EHZ. 2020-11-27T13:29:59.66 0.1 undecidable manual P 317 0.0836 134 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:1 0.0001077 0.28 AML other m 2020-11-27T13:30:01.58
IV.FOSV.EHN. ML:1.1 0.0001435 0.1 AML other m 2020-11-27T13:30:01.65
IV.ATFO.HHE. ML:1.2 0.0001355 0.24 AML other m 2020-11-27T13:30:03.53
IV.ATFO.HHN. ML:1.1 9.805E-5 0.4 AML other m 2020-11-27T13:30:03.58
IV.FRON.EHN. ML:1.4 0.0001795 0.3 AML other m 2020-11-27T13:30:04.29
IV.FRON.EHE. ML:1.2 0.000121 0.58 AML other m 2020-11-27T13:30:04.94
IV.SNTG.HHE. ML:0.6 2.86E-5 1.1 AML other m 2020-11-27T13:30:04.86
IV.SNTG.HHN. ML:0.7 3.85E-5 0.88 AML other m 2020-11-27T13:30:04.94
IV.ARVD.HHE. ML:1 5.91E-5 1.68 AML other m 2020-11-27T13:30:04.10
IV.ARVD.HHN. ML:1 6.775E-5 1.54 AML other m 2020-11-27T13:30:05.16
IV.MURB.HHE. ML:1.4 0.000151 0.42 AML other m 2020-11-27T13:30:05.58
IV.MURB.HHN. ML:1.3 0.000126 0.3 AML other m 2020-11-27T13:30:05.81
IV.ATVO.HHE. ML:0.9 3.85E-5 0.36 AML other m 2020-11-27T13:30:07.08
IV.ATVO.HHN. ML:0.7 2.535E-5 1.36 AML other m 2020-11-27T13:30:09.13
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