Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 27-11-2021 and time 06:18:17 (Italy) in region 1 km SW Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 1 km SW Sellano (PG), on

  • 27-11-2021 05:18:17 (UTC)
  • 27-11-2021 06:18:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8860, 12.9200 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 1 1079 1079
Cerreto di Spoleto PG 7 1075 2154
Preci PG 10 724 2878
Campello sul Clitunno PG 14 2442 5320
Vallo di Nera PG 14 364 5684
Monte Cavallo MC 14 145 5829
Trevi PG 14 8469 14298
Visso MC 15 1107 15405
Norcia PG 18 4957 20362
Sant'Anatolia di Narco PG 18 564 20926
Castelsantangelo sul Nera MC 19 281 21207
Ussita MC 19 444 21651
Foligno PG 19 57155 78806
Poggiodomo PG 19 117 78923

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
69 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
100 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
Bulletin
Rev1000 		Md 1.3
ML 0.8 		2021-11-27
05:18:17		 42.8858 12.9198 11 2022-03-30
13:04:36		 Bollettino Sismico Italiano INGV 100789341
Reviewed
Rev100 		Md 1.4 2021-11-27
05:18:17		 42.883 12.9352 10 2021-11-27
05:25:36		 Sala Sismica INGV-Roma 97858501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-27 05:18:17 ± 0.07
Latitude 42.8858 ± 0.0018
Longitude 12.9198 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100789341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 425
Semi-minor axis of confidence ellipse (meter) 113
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.11961
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 100789341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 17:39:19

Md:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 3
Type of magnitude Md
Reference to an origin 100789341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 17:39:19

Md:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude Md
Reference to an origin 97858501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-27 05:25:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-11-27T05:18:28.87 0.6 undecidable manual S 45 32.5452 50 -0.03 49
IV.FDMO.HHZ. 2021-11-27T05:18:25.76 0.6 undecidable manual S 39 21.5673 116 -0.17 49
IV.GAVE.EHZ. 2021-11-27T05:18:25.83 0.6 undecidable manual S 186 21.5673 116 -0.11 49
IV.NRCA.HNZ. 2021-11-27T05:18:24.48 0.6 undecidable manual S 110 16.872 122 -0.01 51
IV.CSP1.EHZ. 2021-11-27T05:18:24.14 0.3 undecidable manual P 45 32.5452 50 0.01 74
IV.CESI.HHZ. 2021-11-27T05:18:23.48 0.6 undecidable manual S 355 13.2756 128 0 51
IT.MTCL.HGZ. 2021-11-27T05:18:23.55 0.6 undecidable manual S 28 13.5753 127 -0.02 51
IV.GAVE.EHZ. 2021-11-27T05:18:22.34 0.3 undecidable manual P 186 21.5673 116 -0.08 74
IV.FDMO.HHZ. 2021-11-27T05:18:22.30 0.1 undecidable manual P 39 21.5673 116 -0.11 98
IV.CESI.HHZ. 2021-11-27T05:18:21.10 0.1 undecidable manual P 355 13.2756 128 0.1 100
IV.NRCA.HNZ. 2021-11-27T05:18:21.84 0.3 undecidable manual P 110 16.872 122 0.25 72
IT.MTCL.HGZ. 2021-11-27T05:18:21.12 0.3 undecidable manual P 28 13.5753 127 0.06 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.6 0.000046965014999999996 0.16 AML other m 2021-11-27T05:18:24.07
IV.CESI.HHN. ML:0.9 0.000079249165 0.0992 AML other m 2021-11-27T05:18:23.65
IV.GAVE.EHN. ML:0.8 0.000039421224999999996 0.1792 AML other m 2021-11-27T05:18:26.05
IV.GAVE.EHE. ML:0.9 0.00005027851 0.16 AML other m 2021-11-27T05:18:26.60
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