Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 20-11-2020 and time 16:39:58 (UTC) in region 2 km NE Cerreto di Spoleto (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km NE Cerreto di Spoleto (PG), on

  • 20-11-2020 16:39:58 (UTC)
  • 20-11-2020 17:39:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8320, 12.9290 at 8 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
Cerreto di Spoleto PG 2 1075 1075
Sellano PG 6 1079 2154
Vallo di Nera PG 9 364 2518
Preci PG 11 724 3242
Campello sul Clitunno PG 12 2442 5684
Sant'Anatolia di Narco PG 13 564 6248
Poggiodomo PG 13 117 6365
Norcia PG 14 4957 11322
Cascia PG 14 3217 14539
Scheggino PG 15 461 15000
Trevi PG 16 8469 23469
Visso MC 17 1107 24576
Spoleto PG 19 38218 62794
Monte Cavallo MC 19 145 62939
Castelsantangelo sul Nera MC 20 281 63220

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
54 Km SE of Perugia (166134 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
66 Km W of Teramo (54892 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
100 Km SW of Ancona (100861 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 		ML 0.9 2020-11-20
16:39:58		 42.8318 12.9287 8 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86095491
Reviewed
Rev100 		ML 0.9 2020-11-20
16:39:58		 42.8318 12.9287 8 2020-11-20
17:06:06		 Sala Sismica INGV-Roma 84876571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-20 16:39:58 ± 0.08
Latitude 42.8318 ± 0.0027
Longitude 12.9287 ± 0.0135
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86095491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1060
Semi-minor axis of confidence ellipse (meter) 233
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32915
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86095491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-08 12:20:47

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 84876571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-20 17:06:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2020-11-20T16:41:05.78 3.0 undecidable manual Sn -9.99 0
IV.PIPA.HHZ. 2020-11-20T16:40:57.32 3.0 undecidable manual Pn 0.1 0
IV.SALB.HHZ. 2020-11-20T16:40:52.01 3.0 undecidable manual Pn 1.81 0
GU.TRAV.HHZ. 2020-11-20T16:40:47.71 3.0 undecidable manual Sn 6.19 0
IV.MFNL.HHZ. 2020-11-20T16:40:47.34 3.0 positive manual Pn 4.18 0
IX.MNT3.HHZ.02 2020-11-20T16:40:45.99 3.0 negative manual Pg 14.3 0
IV.NARO.HHZ. 2020-11-20T16:40:44.16 3.0 undecidable manual Sg 4.31 0
IV.APEC.HHZ. 2020-11-20T16:40:42.78 3.0 undecidable manual Sg 6.05 0
IV.CAPR.HNZ. 2020-11-20T16:40:39.36 3.0 undecidable manual Sn -4.85 0
IV.NDIM.HNZ. 2020-11-20T16:40:38.82 3.0 undecidable manual Sg 4.42 0
IV.PTRJ.HNZ. 2020-11-20T16:40:23.16 3.0 undecidable manual Pn -1.24 0
IV.PAOL.HHZ. 2020-11-20T16:40:21.14 3.0 undecidable manual Pn -5.28 0
IV.CSP1.EHZ. 2020-11-20T16:40:11.30 0.3 undecidable manual S 38 36.5412 50 0.03 72
IV.FDMO.HHZ. 2020-11-20T16:40:07.84 0.3 undecidable manual S 30 26.0517 108 -0.15 72
IV.EUCT.HNZ. 2020-11-20T16:40:07.77 3.0 undecidable manual Pg 9.39 0
IV.CSP1.EHZ. 2020-11-20T16:40:05.77 0.3 undecidable manual P 38 36.5412 50 -0.1 71
IV.CESI.HHZ. 2020-11-20T16:40:05.79 0.3 undecidable manual S 354 19.2696 114 0.01 75
IV.FDMO.HHZ. 2020-11-20T16:40:04.26 0.3 undecidable manual P 30 26.0517 108 0.29 70
IV.GAVE.EHZ. 2020-11-20T16:40:04.63 0.3 undecidable manual S 190 15.7731 118 -0.04 75
IV.CESI.HHZ. 2020-11-20T16:40:02.65 0.1 undecidable manual P 354 19.2696 114 -0.04 99
IV.GAVE.EHZ. 2020-11-20T16:40:02.07 0.1 positive manual P 190 15.7731 118 0.02 100
IV.LAV9.HNZ. 2020-11-20T16:40:02.15 3.0 undecidable manual P -3.01 0
IV.CADC.HNZ. 2020-11-20T16:40:00.59 3.0 negative manual Pn -3.16 0
IV.IMI.HHZ. 2020-11-20T16:39:47.38 3.0 undecidable manual Pn 4.22 0
IV.RIBO.EHZ.01 2020-11-20T16:39:43.00 3.0 negative manual P -3.03 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.2 0.000114522495 0.1408 AML other m 2020-11-20T16:40:05.94
IV.CESI.HNN. ML:1.2 0.00011744546999999999 1.8464 AML other m 2020-11-20T16:40:05.95
IV.CESI.HHE. ML:0.7 0.0000394567605 0.0896 AML other m 2020-11-20T16:40:06.01
IV.CESI.HNE. ML:0.8 0.000043940075 0.0896 AML other m 2020-11-20T16:40:06.36
IV.FDMO.HHN. ML:0.8 0.000034077185000000005 0.1152 AML other m 2020-11-20T16:40:08.38
IV.FDMO.HHE. ML:0.8 0.000035287735 0.1408 AML other m 2020-11-20T16:40:08.49
IV.CSP1.EHN. ML:1.0 0.000037366750000000006 0.1408 AML other m 2020-11-20T16:40:11.40
IV.CSP1.EHE. ML:1.3 0.00007310899500000001 0.1664 AML other m 2020-11-20T16:40:12.11
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