Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 03-10-2023 and time 19:30:35 (UTC) in region 4 km W Cerreto di Spoleto (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km W Cerreto di Spoleto (PG), on

  • 03-10-2023 19:30:35 (UTC)
  • 03-10-2023 21:30:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8230, 12.8690 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
Cerreto di Spoleto PG 4 1075 1075
Vallo di Nera PG 6 364 1439
Campello sul Clitunno PG 7 2442 3881
Sellano PG 9 1079 4960
Sant'Anatolia di Narco PG 10 564 5524
Trevi PG 12 8469 13993
Scheggino PG 13 461 14454
Poggiodomo PG 13 117 14571
Spoleto PG 14 38218 52789
Preci PG 15 724 53513
Castel Ritaldi PG 16 3278 56791
Cascia PG 17 3217 60008
Norcia PG 19 4957 64965
Montefalco PG 19 5679 70644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SE of Foligno (57155 inhabitants)
34 Km NE of Terni (111501 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
71 Km W of Teramo (54892 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
92 Km N of Guidonia Montecelio (88673 inhabitants)
96 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 0.8 2023-10-03
19:30:35		 42.8228 12.8688 10 2023-10-03
19:42:27		 Sala Sismica INGV-Roma 121722741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-03 19:30:35 ± 0.07
Latitude 42.8228 ± 0.0036
Longitude 12.8688 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121722741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 385
Semi-minor axis of confidence ellipse (meter) 342
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 94
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.13220
Epicentral distance of station farthest from the epicenter (degree) 0.39300
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 121722741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-03 19:42:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2023-10-03T19:30:50.64 0.3 undecidable manual S 119 43.623 50 0.75 59
IV.CSP1.EHZ. 2023-10-03T19:30:49.22 0.3 undecidable manual S 42 40.4262 50 0.17 70
IV.MMO1.EHZ. 2023-10-03T19:30:48.21 0.3 undecidable manual S 77 38.2284 50 -0.24 70
IV.FDMO.HHZ. 2023-10-03T19:30:46.04 0.3 undecidable manual S 37 29.5482 50 -0.12 72
IV.ASSB.HHZ. 2023-10-03T19:30:46.13 0.3 undecidable manual S 325 29.748 50 -0.07 73
IV.LNSS.HHZ. 2023-10-03T19:30:45.09 0.3 undecidable manual S 150 28.1496 50 -0.67 63
IV.MC2.EHZ. 2023-10-03T19:30:45.75 0.3 undecidable manual S 69 27.8499 50 0.07 73
IV.MOMA.HNZ. 2023-10-03T19:30:44.70 0.3 undecidable manual S 265 24.3534 50 -0.07 74
IV.SMA1.EHZ. 2023-10-03T19:30:44.52 0.3 undecidable manual P 119 43.623 50 0.67 61
IV.FEMA.HNZ. 2023-10-03T19:30:43.69 0.3 undecidable manual S 44 21.3675 116 -0.11 74
IV.CSP1.EHZ. 2023-10-03T19:30:43.37 0.1 undecidable manual P 42 40.4262 50 0 97
IV.NRCA.HHZ. 2023-10-03T19:30:43.20 0.3 undecidable manual S 87 19.9689 117 -0.19 73
IV.CESI.HHZ. 2023-10-03T19:30:43.64 0.3 undecidable manual S 8 20.3685 117 0.13 73
IT.MTCL.HGZ. 2023-10-03T19:30:43.68 0.6 undecidable manual S 29 21.7671 115 -0.25 48
IV.MMO1.EHZ. 2023-10-03T19:30:42.95 0.1 undecidable manual P 77 38.2284 50 -0.07 96
IV.GAVE.EHZ. 2023-10-03T19:30:41.72 0.3 undecidable manual S 172 14.6742 125 -0.07 75
IV.LNSS.HHZ. 2023-10-03T19:30:41.13 0.6 undecidable manual P 150 28.1496 50 -0.34 46
IV.FDMO.HHZ. 2023-10-03T19:30:41.59 0.1 undecidable manual P 37 29.5482 50 -0.1 97
IV.MOMA.HNZ. 2023-10-03T19:30:41.05 0.3 undecidable manual P 265 24.3534 50 0.15 73
IV.ASSB.HHZ. 2023-10-03T19:30:41.60 0.1 undecidable manual P 325 29.748 50 -0.12 96
IV.MC2.EHZ. 2023-10-03T19:30:41.45 0.1 undecidable manual P 69 27.8499 50 0.03 99
IV.CESI.HHZ. 2023-10-03T19:30:40.33 0.1 undecidable manual P 8 20.3685 117 0.16 97
IT.MTCL.HGZ. 2023-10-03T19:30:40.40 0.1 undecidable manual P 29 21.7671 115 -0.01 100
IV.FEMA.HNZ. 2023-10-03T19:30:40.41 0.1 undecidable manual P 44 21.3675 116 0.07 99
IV.NRCA.HHZ. 2023-10-03T19:30:40.03 0.1 undecidable manual P 87 19.9689 117 -0.07 99
IV.GAVE.EHZ. 2023-10-03T19:30:39.31 0.1 undecidable manual P 172 14.6742 125 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.000076501365 0.0896 AML other m 2023-10-03T19:30:43.31
IV.CESI.HHN. ML:0.8 0.000050181087 0.1152 AML other m 2023-10-03T19:30:43.96
IV.CESI.HHE. ML:0.8 0.000043457875 0.1664 AML other m 2023-10-03T19:30:44.07
IV.NRCA.HHE. ML:0.7 0.00003950919 0.1024 AML other m 2023-10-03T19:30:45.20
IV.LNSS.HHN. ML:1.0 0.000051750000000000004 0.16 AML other m 2023-10-03T19:30:46.25
IV.LNSS.HHE. ML:0.9 0.00004094871 0.128 AML other m 2023-10-03T19:30:45.95
IV.ASSB.HHE. ML:0.7 0.0000275 0.76 AML other m 2023-10-03T19:30:47.13
IV.ASSB.HHN. ML:0.6 0.000020498274999999998 0.1408 AML other m 2023-10-03T19:30:46.26
IV.NRCA.HNE. ML:0.8 0.000043909125 0.0768 AML other m 2023-10-03T19:30:43.50
IV.NRCA.HNN. ML:1.1 0.000096097755 0.1024 AML other m 2023-10-03T19:30:43.36
IV.MMO1.EHE. ML:0.6 0.00001479705 0.192 AML other m 2023-10-03T19:30:48.75
IV.MMO1.EHN. ML:0.8 0.000025440795 0.256 AML other m 2023-10-03T19:30:48.48
IV.CSP1.EHE. ML:1.0 0.000035287075 0.2048 AML other m 2023-10-03T19:30:49.76
IV.CSP1.EHN. ML:0.9 0.000026570595000000002 0.1664 AML other m 2023-10-03T19:30:49.64
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