Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 10-08-2021 and time 03:43:34 (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

  • 10-08-2021 03:43:34 (UTC)
  • 10-08-2021 05:43:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8010, 12.7450 at 6 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
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 10 364 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 14 1075 64396
Foligno PG 18 57155 121551
Sellano PG 18 1079 122630
Massa Martana PG 18 3770 126400
Poggiodomo PG 18 117 126517
Bevagna PG 19 5081 131598
Gualdo Cattaneo PG 20 6155 137753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Foligno (57155 inhabitants)
28 Km N of Terni (111501 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
80 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
Reviewed
Rev100 		ML 1.0 2021-08-10
03:43:34		 42.8008 12.745 6 2021-08-10
03:49:28		 Sala Sismica INGV-Roma 93906751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-10 03:43:34 ± 0.08
Latitude 42.8008 ± 0.0036
Longitude 12.7450 ± 0.0037
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93906751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 253
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 6
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
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) 0.44426
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 93906751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-10 03:49:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2021-08-10T03:43:51.26 3.0 undecidable manual Pg 0.58 0
IV.CSP1.EHZ. 2021-08-10T03:43:51.47 0.6 undecidable manual S 49 49.3173 50 0.18 46
IV.FDMO.HHZ. 2021-08-10T03:43:47.97 0.3 undecidable manual S 47 38.1285 99 0.02 74
IV.NRCA.HHZ. 2021-08-10T03:43:45.14 0.6 undecidable manual S 83 30.2475 101 -0.11 49
IV.TERO.HHZ. 2021-08-10T03:43:45.48 3.0 undecidable manual Pn -1.16 0
IV.CSP1.EHZ. 2021-08-10T03:43:44.01 0.6 positive manual P 49 49.3173 50 -0.2 46
IV.ASSB.HHZ. 2021-08-10T03:43:44.60 0.6 undecidable manual S 345 27.75 102 0.22 48
IV.FDMO.HHZ. 2021-08-10T03:43:42.21 1.0 negative manual P 47 38.1285 99 -0.07 24
IV.NRCA.HHZ. 2021-08-10T03:43:40.40 0.6 undecidable manual P 83 30.2475 101 -0.32 47
IV.ASSB.HHZ. 2021-08-10T03:43:40.21 0.1 undecidable manual P 345 27.75 102 -0.01 100
IV.GAVE.EHZ. 2021-08-10T03:43:40.95 0.6 undecidable manual S 135 17.0718 109 0.11 50
IV.MOMA.HHZ. 2021-08-10T03:43:39.87 0.6 undecidable manual S 271 14.2746 113 -0.04 51
IV.GAVE.EHZ. 2021-08-10T03:43:38.48 0.6 undecidable manual P 135 17.0718 109 0.3 48
IV.MOMA.HHZ. 2021-08-10T03:43:37.54 0.6 undecidable manual P 271 14.2746 113 -0.1 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:0.8 0.0000735 0.16 AML other m 2021-08-10T03:43:40.42
IV.MOMA.HHE. ML:0.8 0.000070820465 0.1408 AML other m 2021-08-10T03:43:40.71
IV.GAVE.EHE. ML:1.0 0.00008774999999999999 1.84 AML other m 2021-08-10T03:43:42.04
IV.GAVE.EHN. ML:0.9 0.00007045 1.72 AML other m 2021-08-10T03:43:43.89
IV.ASSB.HHN. ML:0.6 0.000019900000000000003 0.96 AML other m 2021-08-10T03:43:45.95
IV.ASSB.HHE. ML:0.7 0.00002385 0.48 AML other m 2021-08-10T03:43:46.24
IV.NRCA.HHN. ML:1.0 0.00004575 0.12 AML other m 2021-08-10T03:43:47.02
IV.NRCA.HHE. ML:1.0 0.0000521 0.12 AML other m 2021-08-10T03:43:47.37
IV.FDMO.HHE. ML:0.4 0.00001165 0.56 AML other m 2021-08-10T03:43:48.90
IV.FDMO.HHN. ML:0.4 0.000012149999999999999 0.78 AML other m 2021-08-10T03:43:49.00
IV.CSP1.EHE. ML:1.4 0.00006637976 14.0576 AML other m 2021-08-10T03:43:53.50
IV.CSP1.EHN. ML:1.2 0.000040447258 4.08 AML other m 2021-08-10T03:43:51.56
IV.MOMA.HNE. ML:1.0 0.00011569094999999998 0.8 AML other m 2021-08-10T03:43:41.36
IV.MOMA.HNN. ML:1.0 0.00012431305 1.4208 AML other m 2021-08-10T03:43:44.57
IV.GAVE.HNE. ML:1.2 0.00013285635 1.3392 AML other m 2021-08-10T03:43:40.35
IV.GAVE.HNN. ML:1.2 0.00014768931500000002 0.96 AML other m 2021-08-10T03:43:40.57
IV.NRCA.HNE. ML:1.4 0.00012723651999999998 0.6592 AML other m 2021-08-10T03:43:57.44
IV.NRCA.HNN. ML:1.6 0.00019593494999999998 0.8704 AML other m 2021-08-10T03:43:44.60
IV.TERO.HHE. ML:3.2 0.0023054959999999998 1.12 AML other m 2021-08-10T03:43:55.00
IV.TERO.HHN. ML:0.8 0.0000091321875 1.6992 AML other m 2021-08-10T03:43:45.18
IV.TERO.HNE. ML:1.8 0.000109568905 1.2896 AML other m 2021-08-10T03:44:12.96
IV.TERO.HNN. ML:2.0 0.00014464455 1.6512 AML other m 2021-08-10T03:43:58.80
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