Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 03-09-2021 and time 21:18:07 (UTC) in region 4 km SW Campello sul Clitunno (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km SW Campello sul Clitunno (PG), on

  • 03-09-2021 21:18:07 (UTC)
  • 03-09-2021 23:18:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7990, 12.7380 at 9 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
Campello sul Clitunno PG 4 2442 2442
Castel Ritaldi PG 6 3278 5720
Spoleto PG 7 38218 43938
Trevi PG 9 8469 52407
Vallo di Nera PG 11 364 52771
Sant'Anatolia di Narco PG 11 564 53335
Scheggino PG 12 461 53796
Montefalco PG 13 5679 59475
Giano dell'Umbria PG 14 3846 63321
Cerreto di Spoleto PG 15 1075 64396
Massa Martana PG 18 3770 68166
Foligno PG 18 57155 125321
Bevagna PG 18 5081 130402
Sellano PG 19 1079 131481
Poggiodomo PG 19 117 131598
Gualdo Cattaneo PG 19 6155 137753
Acquasparta TR 20 4778 142531

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Foligno (57155 inhabitants)
27 Km N of Terni (111501 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
89 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 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 1.0 2021-09-03
21:18:07		 42.7992 12.7378 9 2022-03-30
13:04:05		 Bollettino Sismico Italiano INGV 95259221
Reviewed
Rev100 		ML 1.0 2021-09-03
21:18:07		 42.7978 12.7293 10 2021-09-03
21:30:13		 Sala Sismica INGV-Roma 95009911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-03 21:18:07 ± 0.06
Latitude 42.7992 ± 0.0036
Longitude 12.7378 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95259221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 406
Semi-minor axis of confidence ellipse (meter) 359
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.12321
Epicentral distance of station farthest from the epicenter (degree) 0.44966
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 95009911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-03 21:30:13

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 95259221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-10 06:37:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHN. 2021-09-03T21:18:20.76 0.3 undecidable manual S 47 38.7279 50 0.54 65
IV.NRCA.HHZ. 2021-09-03T21:18:18.01 0.6 undecidable manual S 83 30.8469 50 -0.11 48
IV.LNSS.HNE. 2021-09-03T21:18:18.27 0.1 undecidable manual S 131 32.9448 50 -0.38 91
IV.ASSB.HHZ. 2021-09-03T21:18:17.31 0.6 undecidable manual S 347 27.75 108 0.14 48
IV.CESX.HHZ. 2021-09-03T21:18:16.16 0.1 undecidable manual S 210 24.4533 111 0.06 99
IV.CSP1.EHZ. 2021-09-03T21:18:16.32 0.3 undecidable manual P 49 49.9167 50 -0.04 71
IV.CESI.HNZ. 2021-09-03T21:18:16.62 0.1 undecidable manual S 31 26.5512 109 -0.16 97
IV.ARRO.EHZ. 2021-09-03T21:18:16.44 0.3 undecidable manual S 175 24.4533 111 0.33 70
IV.ATCC.EHZ. 2021-09-03T21:18:15.16 0.3 undecidable manual P 350 43.5231 50 -0.22 69
IT.MTCL.HGE. 2021-09-03T21:18:14.24 0.6 undecidable manual P 44 30.3474 50 0.9 38
IV.FDMO.HHN. 2021-09-03T21:18:14.73 0.1 undecidable manual P 47 38.7279 50 0.09 96
IV.MML1.EHZ. 2021-09-03T21:18:14.82 0.3 undecidable manual P 28 39.7269 50 0.03 73
IV.LNSS.HNE. 2021-09-03T21:18:13.35 0.3 undecidable manual P 131 32.9448 50 -0.39 68
IV.GAVE.EHZ. 2021-09-03T21:18:13.76 0.1 undecidable manual S 133 17.3715 118 -0.1 99
IV.NRCA.HHZ. 2021-09-03T21:18:13.32 0.1 undecidable manual P 83 30.8469 50 -0.11 97
IV.CESI.HNZ. 2021-09-03T21:18:12.72 0.1 undecidable manual P 31 26.5512 109 0.07 98
IV.ARRO.EHZ. 2021-09-03T21:18:12.74 0.1 undecidable manual P 175 24.4533 111 0.48 91
IV.ASSB.HHZ. 2021-09-03T21:18:12.72 0.1 undecidable manual P 347 27.75 108 -0.16 96
IV.MOMA.HHZ. 2021-09-03T21:18:12.52 0.1 undecidable manual S 272 13.6752 124 -0.22 98
IV.CESX.HHZ. 2021-09-03T21:18:12.25 0.1 undecidable manual P 210 24.4533 111 -0.01 100
IT.GNU.HGZ. 2021-09-03T21:18:12.62 0.6 undecidable manual S 272 13.6752 124 -0.12 50
IV.MOMA.HHZ. 2021-09-03T21:18:10.11 0.1 undecidable manual P 272 13.6752 124 -0.21 98
IT.GNU.HGZ. 2021-09-03T21:18:10.61 0.1 undecidable manual P 272 13.6752 124 0.29 96
IV.GAVE.EHZ. 2021-09-03T21:18:10.80 0.1 undecidable manual P 133 17.3715 118 -0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.1 0.0001365 1.5 AML other m 2021-09-03T21:18:13.82
IV.MOMA.HHE. ML:1.1 0.0001285 0.16 AML other m 2021-09-03T21:18:13.71
IV.GAVE.EHE. ML:1.1 0.000111 0.42 AML other m 2021-09-03T21:18:14.65
IV.GAVE.EHN. ML:1.2 0.00011999999999999999 0.44 AML other m 2021-09-03T21:18:14.82
IV.ASSB.HHN. ML:0.8 0.00003375 0.2 AML other m 2021-09-03T21:18:17.62
IV.ASSB.HHE. ML:1.0 0.000048899999999999996 0.24 AML other m 2021-09-03T21:18:17.79
IV.CESX.HHE. ML:1.0 0.00006245 0.46 AML other m 2021-09-03T21:18:18.25
IV.CESX.HHN. ML:1.0 0.000058899999999999995 0.32 AML other m 2021-09-03T21:18:18.25
IV.NRCA.HHN. ML:0.9 0.00004175 0.1 AML other m 2021-09-03T21:18:19.52
IV.NRCA.HHE. ML:1.0 0.00004565 1.82 AML other m 2021-09-03T21:18:19.06
IV.MML1.EHE. ML:0.8 0.0000266 0.48 AML other m 2021-09-03T21:18:22.54
IV.MML1.EHN. ML:0.6 0.00001635 0.98 AML other m 2021-09-03T21:18:22.29
IV.ATCC.EHN. ML:1.0 0.0000349 1.84 AML other m 2021-09-03T21:18:23.07
IV.ATCC.EHE. ML:1.0 0.0000307 0.54 AML other m 2021-09-03T21:18:24.38
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