Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 05-09-2021 and time 18:04:27 (Italy) in region 4 km NE Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km NE Sellano (PG), on

  • 05-09-2021 16:04:27 (UTC)
  • 05-09-2021 18:04:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9180, 12.9610 at 11 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 4 1079 1079
Preci PG 8 724 1803
Monte Cavallo MC 9 145 1948
Visso MC 11 1107 3055
Cerreto di Spoleto PG 11 1075 4130
Ussita MC 15 444 4574
Castelsantangelo sul Nera MC 16 281 4855
Pieve Torina MC 16 1458 6313
Fiordimonte MC 17 202 6515
Serravalle di Chienti MC 17 1070 7585
Norcia PG 18 4957 12542
Trevi PG 18 8469 21011
Vallo di Nera PG 18 364 21375
Campello sul Clitunno PG 18 2442 23817
Pievebovigliana MC 19 866 24683
Muccia MC 20 915 25598

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km E of Perugia (166134 inhabitants)
67 Km W of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
90 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 0.8 2021-09-05
16:04:27		 42.9177 12.9612 11 2022-03-30
13:04:05		 Bollettino Sismico Italiano INGV 95422781
Reviewed
Rev100 		ML 0.9 2021-09-05
16:04:27		 42.9122 12.9718 10 2021-09-05
16:16:10		 Sala Sismica INGV-Roma 95078911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-05 16:04:27 ± 0.04
Latitude 42.9177 ± 0.0018
Longitude 12.9612 ± 0.0037
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 95422781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 338
Semi-minor axis of confidence ellipse (meter) 236
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 26
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 95422781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-14 13:09:17

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 95078911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-05 16:16:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SGAL.EHZ. 2021-09-05T16:06:08.82 3.0 undecidable manual Sg 8.42 0
IV.ZEN8.EHZ. 2021-09-05T16:06:07.12 3.0 undecidable manual Sg 8.56 0
IV.EUCT.HNZ. 2021-09-05T16:06:05.00 3.0 undecidable manual Sn -1.07 0
IV.VOBA.EHZ. 2021-09-05T16:06:02.75 3.0 undecidable manual Sg 2.3 0
GU.MGRO.HHZ. 2021-09-05T16:06:02.67 3.0 undecidable manual Sn -7.68 0
CR.ZAG.BHZ. 2021-09-05T16:06:01.80 3.0 undecidable manual Sn -9.99 0
IV.HMDC.HHZ. 2021-09-05T16:05:52.27 3.0 positive manual Pn 4.06 0
IV.SBPO.HNZ. 2021-09-05T16:05:48.98 3.0 undecidable manual Sg 4.66 0
IV.CMPR.HHZ. 2021-09-05T16:05:47.29 3.0 undecidable manual Sn 0.94 0
IV.CRND.HNZ. 2021-09-05T16:05:43.71 3.0 undecidable manual Sn -9.99 0
MN.VAE.HHZ. 2021-09-05T16:05:43.33 3.0 undecidable manual Pn 3.05 0
IX.NSC3.EHZ.02 2021-09-05T16:05:38.94 3.0 undecidable manual Sg 4.34 0
IV.SPS2.HHZ. 2021-09-05T16:05:35.46 3.0 positive manual Pg 8.55 0
GU.MGRO.HHZ. 2021-09-05T16:05:31.58 3.0 positive manual Pg 9.04 0
IV.SERS.HHZ. 2021-09-05T16:05:27.99 3.0 undecidable manual Pn -3.99 0
IV.PTRJ.HNZ. 2021-09-05T16:05:22.37 3.0 undecidable manual Sg 4.39 0
IV.CSFT.HHZ. 2021-09-05T16:05:20.87 3.0 undecidable manual Sn -2.64 0
IV.VENT.EHZ. 2021-09-05T16:05:20.04 3.0 undecidable manual Sn 1.14 0
IV.MNTV.EHZ. 2021-09-05T16:05:17.05 3.0 negative manual Pg 7.34 0
IX.SCL3.EHZ.02 2021-09-05T16:05:14.06 3.0 positive manual Pg 7.22 0
IV.DGI.HHZ. 2021-09-05T16:05:11.75 3.0 negative manual Pn -1.5 0
IV.RIBO.EHZ.01 2021-09-05T16:05:02.06 3.0 undecidable manual S -5.01 0
IV.LNSS.HNZ. 2021-09-05T16:04:39.02 0.6 undecidable manual S 170 35.5422 50 -0.17 47
IV.CSP1.EHZ. 2021-09-05T16:04:37.11 0.6 undecidable manual S 46 27.6501 50 0.02 49
IV.ASSB.HHN. 2021-09-05T16:04:37.09 0.6 undecidable manual S 300 28.1496 50 -0.14 48
IV.PP3.EHZ. 2021-09-05T16:04:37.98 3.0 undecidable manual P -5.07 0
IV.PF6.EHN. 2021-09-05T16:04:37.78 0.6 undecidable manual S 38 30.8469 50 -0.17 48
IV.GAVE.EHZ. 2021-09-05T16:04:36.62 0.3 undecidable manual S 192 25.5522 50 0.08 73
IV.MML1.EHZ. 2021-09-05T16:04:35.50 0.3 undecidable manual S 2 21.7671 50 -0.01 75
IV.MC2.EHZ. 2021-09-05T16:04:34.91 0.6 undecidable manual S 92 18.5703 50 0.26 48
IV.MOMA.HNZ. 2021-09-05T16:04:34.18 1.0 undecidable manual P 248 34.2435 50 0.26 23
IV.LNSS.HNZ. 2021-09-05T16:04:33.98 0.1 undecidable manual P 170 35.5422 50 -0.14 95
IV.FDMO.HHZ. 2021-09-05T16:04:33.93 0.3 undecidable manual S 38 16.6722 123 -0.18 73
IV.PF6.EHN. 2021-09-05T16:04:33.29 0.1 undecidable manual P 38 30.8469 50 -0.12 96
IV.CSP1.EHZ. 2021-09-05T16:04:33.04 0.3 undecidable manual P 46 27.6501 50 0.13 72
IV.NRCA.HHZ. 2021-09-05T16:04:33.54 0.3 undecidable manual S 127 15.5733 125 -0.25 72
IV.CESI.HHZ. 2021-09-05T16:04:32.37 0.3 undecidable manual S 335 10.6782 135 -0.12 75
IV.GAVE.EHZ. 2021-09-05T16:04:32.63 0.1 undecidable manual P 192 25.5522 50 0.03 99
IV.SEF1.HNN. 2021-09-05T16:04:32.49 1.0 undecidable manual P 358 25.4523 50 -0.08 24
IV.MML1.EHZ. 2021-09-05T16:04:32.20 0.1 undecidable manual P 2 21.7671 50 0.2 96
IV.ASSB.HHN. 2021-09-05T16:04:32.84 0.6 undecidable manual P 300 28.1496 50 -0.16 48
IV.FEMA.HNE. 2021-09-05T16:04:31.92 0.6 undecidable manual S 56 8.6802 141 -0.11 50
IV.MC2.EHZ. 2021-09-05T16:04:31.69 0.3 undecidable manual P 92 18.5703 50 0.19 73
IV.FDMO.HHZ. 2021-09-05T16:04:31.25 0.1 undecidable manual P 38 16.6722 123 0.06 100
IT.MTCL.HGZ. 2021-09-05T16:04:31.79 0.3 undecidable manual S 20 8.9799 140 -0.31 72
IV.NRCA.HHZ. 2021-09-05T16:04:30.94 0.1 undecidable manual P 127 15.5733 125 -0.06 100
IT.MTCL.HGZ. 2021-09-05T16:04:30.17 0.1 undecidable manual P 20 8.9799 140 0.14 99
IV.CESI.HHZ. 2021-09-05T16:04:30.40 0.1 undecidable manual P 335 10.6782 135 0.14 99
IV.FEMA.HNE. 2021-09-05T16:04:30.32 0.1 undecidable manual P 56 8.6802 141 0.33 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.0 0.00010665 0.36 AML other m 2021-09-05T16:04:32.79
IV.CESI.HHE. ML:0.8 0.0000665 0.12 AML other m 2021-09-05T16:04:32.73
IV.FDMO.HHE. ML:0.8 0.0000539 0.38 AML other m 2021-09-05T16:04:34.08
IV.FDMO.HHN. ML:0.7 0.000045249999999999995 1.62 AML other m 2021-09-05T16:04:35.98
IV.MML1.EHN. ML:0.8 0.0000395 0.16 AML other m 2021-09-05T16:04:35.82
IV.MML1.EHE. ML:0.9 0.000051949999999999996 0.22 AML other m 2021-09-05T16:04:35.95
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