Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 30-10-2021 and time 20:45:34 (Italy) in region 3 km E Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 3 km E Sellano (PG), on

  • 30-10-2021 18:45:34 (UTC)
  • 30-10-2021 20:45:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8920, 12.9660 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 3 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 9 1075 2878
Visso MC 11 1107 3985
Monte Cavallo MC 12 145 4130
Norcia PG 15 4957 9087
Ussita MC 15 444 9531
Castelsantangelo sul Nera MC 15 281 9812
Vallo di Nera PG 16 364 10176
Campello sul Clitunno PG 17 2442 12618
Trevi PG 18 8469 21087
Pieve Torina MC 18 1458 22545
Fiordimonte MC 19 202 22747
Cascia PG 20 3217 25964
Poggiodomo PG 20 117 26081

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
92 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
Reviewed
Rev100 		ML 0.8 2021-10-30
18:45:34		 42.8918 12.9658 10 2021-10-30
18:50:36		 Sala Sismica INGV-Roma 97095841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-30 18:45:34 ± 0.15
Latitude 42.8918 ± 0.0027
Longitude 12.9658 ± 0.0037
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 97095841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 109
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.20594
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.8
Num. used stations 14
Type of magnitude ML
Reference to an origin 97095841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-30 18:50:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-10-30T18:46:19.76 3.0 positive manual Pg 17.92 0
IV.ZEN8.EHZ. 2021-10-30T18:46:18.04 3.0 undecidable manual Pn 2.09 0
MN.TRI.HHZ. 2021-10-30T18:46:16.19 3.0 undecidable manual Pg 12.72 0
IV.MCIV.CHZ. 2021-10-30T18:45:55.62 3.0 undecidable manual Pg 13.51 0
IV.CSNT.HHZ. 2021-10-30T18:45:48.78 3.0 positive manual Pn -2.03 0
IV.GAVE.EHZ. 2021-10-30T18:45:43.02 0.3 undecidable manual S 195 22.8549 114 -0.14 72
IV.MC2.EHZ. 2021-10-30T18:45:41.86 0.3 undecidable manual S 83 18.2706 119 0.13 73
IV.FDMO.HHZ. 2021-10-30T18:45:41.68 0.3 undecidable manual S 32 18.87 119 -0.22 71
IV.NRCA.HHZ. 2021-10-30T18:45:40.39 0.1 undecidable manual S 118 13.6752 127 -0.01 100
IV.CESI.HHZ. 2021-10-30T18:45:40.40 0.3 undecidable manual S 338 13.4754 127 0.05 74
IV.MML1.EHZ. 2021-10-30T18:45:39.71 3.0 negative manual Pg 4.57 0
IV.GAVE.EHZ. 2021-10-30T18:45:39.50 0.1 undecidable manual P 195 22.8549 114 0.01 98
IV.FDMO.HHZ. 2021-10-30T18:45:38.65 0.1 undecidable manual P 32 18.87 119 -0.11 97
IV.MC2.EHZ. 2021-10-30T18:45:38.66 0.1 undecidable manual P 83 18.2706 119 0 99
IV.CESI.HHZ. 2021-10-30T18:45:37.99 0.1 positive manual P 338 13.4754 127 0.14 97
IV.NRCA.HHZ. 2021-10-30T18:45:37.97 0.1 positive manual P 118 13.6752 127 0.08 99
IV.PP3.EHZ. 2021-10-30T18:45:29.04 3.0 negative manual Pn -5.31 0
CR.STON.BHZ. 2021-10-30T18:45:27.58 3.0 undecidable manual Pn -2.4 0
IV.VAGA.HHZ. 2021-10-30T18:45:22.33 3.0 undecidable manual S -3.5 0
IT.PLTA.HNZ. 2021-10-30T18:45:08.99 3.0 undecidable manual Pg -1.68 0
IV.VITU.HHZ. 2021-10-30T18:45:03.87 3.0 undecidable manual P -1.07 0
IV.BSSO.HHZ. 2021-10-30T18:45:03.90 3.0 undecidable manual P -4.24 0
IV.MRB1.HHZ. 2021-10-30T18:44:57.06 3.0 undecidable manual P -3.65 0
IX.SCL3.EHZ.02 2021-10-30T18:44:56.84 3.0 undecidable manual S -2.09 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.SCL3.EHN.02 ML:2.8 0.00006950000000000001 0.08 AML other m 2021-10-30T18:45:01.21
IX.SCL3.EHE.02 ML:2.8 0.00006815 0.06 AML other m 2021-10-30T18:45:02.01
IV.NRCA.HHN. ML:0.8 0.0000666 0.88 AML other m 2021-10-30T18:45:40.63
IV.CESI.HHE. ML:0.4 0.0000246 0.24 AML other m 2021-10-30T18:45:40.73
IV.CESI.HHN. ML:0.5 0.00003165 0.24 AML other m 2021-10-30T18:45:40.66
IV.NRCA.HHE. ML:0.6 0.0000419 0.46 AML other m 2021-10-30T18:45:40.85
IV.FDMO.HHE. ML:0.6 0.000029449999999999998 0.32 AML other m 2021-10-30T18:45:41.80
IV.FDMO.HHN. ML:0.5 0.000023100000000000002 0.16 AML other m 2021-10-30T18:45:42.51
IV.BSSO.HNN. ML:2.8 0.0001777 0.42 AML other m 2021-10-30T18:45:43.13
IV.MML1.EHE. ML:0.5 0.00001775 0.22 AML other m 2021-10-30T18:45:43.68
IV.MML1.EHN. ML:0.2 0.000012345 0.7 AML other m 2021-10-30T18:45:43.68
IV.BSSO.HNE. ML:2.5 0.00009409 0.42 AML other m 2021-10-30T18:45:44.86
IV.VAGA.HNN. ML:3.2 0.0005645 0.86 AML other m 2021-10-30T18:45:48.28
IV.VAGA.HNE. ML:3.1 0.0004235 1.14 AML other m 2021-10-30T18:45:48.28
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