Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-09-2021 and time 04:03:03 (UTC) in region 6 km N Sellano (PG)

A magnitude ML 0.9 earthquake occured in region: 6 km N Sellano (PG), on

  • 01-09-2021 04:03:03 (UTC)
  • 01-09-2021 06:03:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9390, 12.9190 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 6 1079 1079
Monte Cavallo MC 9 145 1224
Preci PG 12 724 1948
Cerreto di Spoleto PG 13 1075 3023
Visso MC 14 1107 4130
Serravalle di Chienti MC 15 1070 5200
Trevi PG 16 8469 13669
Pieve Torina MC 16 1458 15127
Campello sul Clitunno PG 18 2442 17569
Foligno PG 18 57155 74724
Fiordimonte MC 18 202 74926
Ussita MC 18 444 75370
Valtopina PG 19 1398 76768
Muccia MC 19 915 77683
Pievebovigliana MC 19 866 78549
Vallo di Nera PG 19 364 78913
Castelsantangelo sul Nera MC 20 281 79194

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Foligno (57155 inhabitants)
47 Km E of Perugia (166134 inhabitants)
48 Km NE of Terni (111501 inhabitants)
71 Km W of Teramo (54892 inhabitants)
76 Km NW of L'Aquila (69753 inhabitants)
88 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
Reviewed
Rev100 		ML 0.9 2021-09-01
04:03:03		 42.9393 12.9193 10 2021-09-01
04:15:55		 Sala Sismica INGV-Roma 94894491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 04:03:03 ± 0.07
Latitude 42.9393 ± 0.0054
Longitude 12.9193 ± 0.0061
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 94894491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 370
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
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 23
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28958
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 94894491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-01 04:15:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HNZ. 2021-09-01T04:03:16.82 3.0 negative manual P -1.17 0
IV.MOMA.HNE. 2021-09-01T04:03:15.20 0.3 undecidable manual S 242 32.1456 50 0.18 70
IV.GAVE.EHZ. 2021-09-01T04:03:13.72 0.3 undecidable manual S 184 27.4503 50 -0.06 73
IV.ASSB.HHZ. 2021-09-01T04:03:12.47 0.1 undecidable manual S 299 24.0537 113 -0.36 92
IV.NRCA.HHZ. 2021-09-01T04:03:11.26 0.1 undecidable manual S 126 19.6692 117 -0.2 96
IV.MML1.EHZ. 2021-09-01T04:03:11.46 0.1 undecidable manual S 12 19.7691 117 -0.02 99
IV.FDMO.HHZ. 2021-09-01T04:03:10.40 0.1 undecidable manual S 52 17.3715 120 -0.35 93
IV.ATCC.EHZ. 2021-09-01T04:03:10.70 3.0 undecidable manual P 0.05 0
IV.MOMA.HNE. 2021-09-01T04:03:10.57 0.3 undecidable manual P 242 32.1456 50 0.3 69
IV.MMO1.EHZ. 2021-09-01T04:03:10.26 3.0 undecidable manual P -0.07 0
IV.FEMA.HNE. 2021-09-01T04:03:09.13 0.1 undecidable manual S 77 10.878 133 0.2 97
IV.MC2.EHZ. 2021-09-01T04:03:09.67 3.0 undecidable manual P 1.15 0
IV.CSP1.EHZ. 2021-09-01T04:03:09.56 3.0 undecidable manual P 0 0
IV.GAVE.EHZ. 2021-09-01T04:03:09.43 0.1 undecidable manual P 184 27.4503 50 -0.12 96
IV.ASSB.HHZ. 2021-09-01T04:03:08.79 0.1 negative manual P 299 24.0537 113 -0.21 95
IV.MML1.EHZ. 2021-09-01T04:03:08.19 0.1 positive manual P 12 19.7691 117 -0.03 99
IT.MTCL.HGE. 2021-09-01T04:03:08.37 0.1 undecidable manual S 47 8.88 139 -0.07 100
IV.NRCA.HHZ. 2021-09-01T04:03:08.12 0.1 negative manual P 126 19.6692 117 -0.09 98
IV.CESI.HHZ. 2021-09-01T04:03:08.34 0.1 undecidable manual S 351 7.3815 144 0.23 97
IV.FDMO.HHZ. 2021-09-01T04:03:07.76 0.1 undecidable manual P 52 17.3715 120 -0.04 99
IV.FEMA.HNE. 2021-09-01T04:03:07.01 0.1 undecidable manual P 77 10.878 133 0.26 96
IT.MTCL.HGE. 2021-09-01T04:03:06.61 0.1 undecidable manual P 47 8.88 139 0.14 99
IV.CESI.HHZ. 2021-09-01T04:03:06.59 0.1 positive manual P 351 7.3815 144 0.31 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.8 0.0000828 0.34 AML other m 2021-09-01T04:03:08.65
IV.CESI.HHE. ML:0.7 0.0000543 0.72 AML other m 2021-09-01T04:03:08.65
IV.FDMO.HHE. ML:0.8 0.00005795 0.16 AML other m 2021-09-01T04:03:10.63
IV.FDMO.HHN. ML:1.0 0.00008460000000000001 0.18 AML other m 2021-09-01T04:03:10.63
IV.NRCA.HHN. ML:1.1 0.00008355 0.14 AML other m 2021-09-01T04:03:11.54
IV.NRCA.HHE. ML:0.7 0.000041700000000000004 0.3 AML other m 2021-09-01T04:03:11.75
IV.MML1.EHN. ML:1.1 0.0000861 0.14 AML other m 2021-09-01T04:03:11.59
IV.MML1.EHE. ML:1.0 0.0000775 0.12 AML other m 2021-09-01T04:03:11.69
IV.ASSB.HHN. ML:0.7 0.000030100000000000003 0.38 AML other m 2021-09-01T04:03:13.01
IV.ASSB.HHE. ML:0.5 0.00002 0.34 AML other m 2021-09-01T04:03:13.18
IV.CSP1.EHN. ML:1.1 0.0000575 1.7 AML other m 2021-09-01T04:03:14.85
IV.GAVE.EHE. ML:0.8 0.0000288 0.52 AML other m 2021-09-01T04:03:14.21
IV.CSP1.EHE. ML:1.1 0.000072 0.62 AML other m 2021-09-01T04:03:14.53
IV.GAVE.EHN. ML:0.8 0.00002875 0.6 AML other m 2021-09-01T04:03:14.34
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