Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 02-08-2023 and time 20:25:50 (Italy) in region 4 km W Trevi (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km W Trevi (PG), on

  • 02-08-2023 18:25:50 (UTC)
  • 02-08-2023 20:25:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8720, 12.6970 at 10 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
Trevi PG 4 8469 8469
Montefalco PG 4 5679 14148
Castel Ritaldi PG 6 3278 17426
Campello sul Clitunno PG 9 2442 19868
Foligno PG 10 57155 77023
Bevagna PG 10 5081 82104
Giano dell'Umbria PG 11 3846 85950
Gualdo Cattaneo PG 12 6155 92105
Spello PG 14 8645 100750
Spoleto PG 16 38218 138968
Cannara PG 17 4305 143273
Vallo di Nera PG 18 364 143637
Massa Martana PG 18 3770 147407
Cerreto di Spoleto PG 19 1075 148482
Sellano PG 19 1079 149561
Sant'Anatolia di Narco PG 19 564 150125

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km S of Foligno (57155 inhabitants)
35 Km N of Terni (111501 inhabitants)
36 Km SE of Perugia (166134 inhabitants)
70 Km NE of Viterbo (67173 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
86 Km W of Teramo (54892 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
97 Km N of Guidonia Montecelio (88673 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 1.3 2023-08-02
18:25:50		 42.8715 12.697 10 2024-09-10
16:44:30		 Bollettino Sismico Italiano INGV 131044741
Reviewed
Rev100 		ML 1.4 2023-08-02
18:25:50		 42.8702 12.6937 10 2023-08-02
18:42:31		 Sala Sismica INGV-Roma 119803671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-02 18:25:50 ± 0.03
Latitude 42.8715 ± 0.0018
Longitude 12.6970 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 131044741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 244
Semi-minor axis of confidence ellipse (meter) 189
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 0.52520
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 119803671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-02 18:42:31

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 131044741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-08-28 11:39:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2023-08-02T18:26:09.06 0.6 undecidable manual S 133 58.2972 50 0.38 43
IV.CSP1.EHZ. 2023-08-02T18:26:06.31 0.6 undecidable manual S 59 47.9187 50 0.4 43
IV.ATCC.EHZ. 2023-08-02T18:26:02.56 0.6 undecidable manual S 352 35.1426 50 0.08 47
IV.MML1.EHZ. 2023-08-02T18:26:02.30 0.6 undecidable manual S 40 34.9428 50 -0.14 47
IV.FDMO.HHZ. 2023-08-02T18:26:02.85 0.6 undecidable manual S 60 36.6411 50 -0.04 48
IV.NRCA.HHZ. 2023-08-02T18:26:02.06 0.3 undecidable manual S 97 34.2435 50 -0.19 70
IV.FEMA.HNE. 2023-08-02T18:26:01.33 0.6 undecidable manual S 71 30.3474 50 0.1 48
IT.MTCL.HGZ. 2023-08-02T18:26:00.49 0.6 undecidable manual S 61 28.0497 50 -0.12 48
IV.CESX.HHZ. 2023-08-02T18:26:00.93 0.6 undecidable manual S 197 30.5472 50 -0.34 45
IV.RM33.EHZ. 2023-08-02T18:26:00.94 0.3 undecidable manual P 133 58.2972 50 -0.02 69
IV.CSP1.EHZ. 2023-08-02T18:25:59.43 0.1 undecidable manual P 59 47.9187 50 0.07 93
IV.SNTG.HHZ. 2023-08-02T18:25:59.27 0.3 undecidable manual P 25 46.9197 50 0.07 70
IV.GAVE.EHN. 2023-08-02T18:25:59.85 0.6 undecidable manual S 141 25.5522 111 -0.07 48
IV.CESI.HHZ. 2023-08-02T18:25:58.87 0.6 undecidable manual S 49 22.4553 114 -0.05 49
IV.ASSB.HHZ. 2023-08-02T18:25:57.90 0.6 undecidable manual S 351 19.2696 117 -0.02 49
IV.NRCA.HHZ. 2023-08-02T18:25:57.14 0.1 positive manual P 97 34.2435 50 -0.1 95
IV.ATCC.EHZ. 2023-08-02T18:25:57.42 0.3 undecidable manual P 352 35.1426 50 0.04 72
IV.MML1.EHZ. 2023-08-02T18:25:57.25 0.1 undecidable manual P 40 34.9428 50 -0.1 95
IV.FDMO.HHZ. 2023-08-02T18:25:57.58 0.1 undecidable manual P 60 36.6411 50 -0.03 95
IV.ARRO.EHZ. 2023-08-02T18:25:57.44 0.3 undecidable manual P 170 32.9448 50 0.39 67
IV.CESX.HHZ. 2023-08-02T18:25:56.58 0.3 undecidable manual P 197 30.5472 50 -0.1 71
IV.FEMA.HNE. 2023-08-02T18:25:56.63 0.3 undecidable manual P 71 30.3474 50 -0.02 73
IT.GNU.HGE. 2023-08-02T18:25:56.01 0.6 undecidable manual S 234 12.7761 128 -0.01 50
IT.MTCL.HGZ. 2023-08-02T18:25:56.16 0.3 undecidable manual P 61 28.0497 50 -0.14 71
IV.GAVE.EHN. 2023-08-02T18:25:55.92 0.1 undecidable manual P 141 25.5522 111 0.02 98
IV.MOMA.HNZ. 2023-08-02T18:25:55.98 0.6 undecidable manual S 234 12.7761 128 -0.04 50
IV.CESI.HHZ. 2023-08-02T18:25:55.36 0.1 undecidable manual P 49 22.4553 114 0.04 98
IV.ASSB.HHZ. 2023-08-02T18:25:54.76 0.1 negative manual P 351 19.2696 117 0.02 99
IV.MOMA.HNZ. 2023-08-02T18:25:53.69 0.1 undecidable manual P 234 12.7761 128 0.04 99
IT.GNU.HGE. 2023-08-02T18:25:53.66 0.1 undecidable manual P 234 12.7761 128 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.3 0.00014850000000000003 0.74 AML other m 2023-08-02T18:25:58.06
IV.ASSB.HHE. ML:1.4 0.0001715 0.74 AML other m 2023-08-02T18:25:59.43
IV.CESI.HHN. ML:1.5 0.0001955 1.28 AML other m 2023-08-02T18:25:59.79
IV.CESI.HHE. ML:1.3 0.00014 0.44 AML other m 2023-08-02T18:26:00.51
IV.NRCA.HHN. ML:1.7 0.00022 1.08 AML other m 2023-08-02T18:26:02.09
IV.NRCA.HHE. ML:1.7 0.000225 0.1 AML other m 2023-08-02T18:26:02.71
IV.MML1.EHN. ML:1.2 0.0000603 1.02 AML other m 2023-08-02T18:26:02.18
IV.FDMO.HHN. ML:1.4 0.00009214999999999999 0.74 AML other m 2023-08-02T18:26:03.48
IV.CESX.HHE. ML:1.4 0.00010485 0.4 AML other m 2023-08-02T18:26:03.64
IV.ARRO.EHN. ML:1.0 0.000043450000000000006 0.76 AML other m 2023-08-02T18:26:03.50
IV.ATCC.EHN. ML:1.2 0.00006615 0.14 AML other m 2023-08-02T18:26:03.91
IV.ATCC.EHE. ML:1.4 0.00009675000000000001 1.1 AML other m 2023-08-02T18:26:04.03
IV.CESX.HHN. ML:1.4 0.00010300000000000001 0.46 AML other m 2023-08-02T18:26:04.29
IV.FDMO.HHE. ML:1.3 0.00007885 0.52 AML other m 2023-08-02T18:26:04.80
IV.MML1.EHE. ML:1.2 0.00006145 0.42 AML other m 2023-08-02T18:26:05.34
IV.ARRO.EHE. ML:1.0 0.0000394 1.04 AML other m 2023-08-02T18:26:05.81
IV.CSP1.EHE. ML:1.7 0.0001415 0.26 AML other m 2023-08-02T18:26:06.85
IV.CSP1.EHN. ML:1.9 0.0002385 0.12 AML other m 2023-08-02T18:26:06.84
IV.SNTG.HHE. ML:1.1 0.0000329 0.6 AML other m 2023-08-02T18:26:07.60
IV.SNTG.HHN. ML:1.1 0.000033299999999999996 0.24 AML other m 2023-08-02T18:26:08.27
IV.ATFO.HHN. ML:1.3 0.00004505 0.28 AML other m 2023-08-02T18:26:09.42
IV.ATFO.HHE. ML:1.5 0.00007115000000000001 0.3 AML other m 2023-08-02T18:26:09.54
IV.RM33.EHE. ML:1.3 0.000042300000000000005 1.52 AML other m 2023-08-02T18:26:10.12
IV.RM33.EHN. ML:1.3 0.000041 0.24 AML other m 2023-08-02T18:26:11.57
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