Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 03-08-2023 and time 14:50:38 (Italy) in region 4 km W Trevi (PG)

A magnitude ML 1.5 earthquake occured in region: 4 km W Trevi (PG), on

  • 03-08-2023 12:50:38 (UTC)
  • 03-08-2023 14:50:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8690, 12.7040 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
Trevi PG 4 8469 8469
Montefalco PG 5 5679 14148
Castel Ritaldi PG 6 3278 17426
Campello sul Clitunno PG 8 2442 19868
Foligno PG 10 57155 77023
Bevagna PG 11 5081 82104
Giano dell'Umbria PG 11 3846 85950
Gualdo Cattaneo PG 13 6155 92105
Spello PG 14 8645 100750
Spoleto PG 15 38218 138968
Vallo di Nera PG 17 364 139332
Cannara PG 17 4305 143637
Massa Martana PG 18 3770 147407
Cerreto di Spoleto PG 18 1075 148482
Sellano PG 18 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)
37 Km SE of Perugia (166134 inhabitants)
70 Km NE of Viterbo (67173 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
85 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 1.5 2023-08-03
12:50:38		 42.8688 12.7035 9 2024-09-10
16:44:15		 Bollettino Sismico Italiano INGV 120377431
Reviewed
Rev100 		ML 1.5 2023-08-03
12:50:38		 42.8682 12.7055 9 2023-08-03
12:59:08		 Sala Sismica INGV-Roma 119825971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-03 12:50:38 ± 0.04
Latitude 42.8688 ± 0.0018
Longitude 12.7035 ± 0.0025
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 120377431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 231
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70777
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 119825971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-03 12:59:08

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 120377431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-22 08:56:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2023-08-03T12:51:42.58 3.0 undecidable manual Sg 7.71 0
IV.FNVD.HHZ. 2023-08-03T12:51:22.91 3.0 undecidable manual Sn 1.14 0
IV.RIBO.EHZ.01 2023-08-03T12:51:11.91 3.0 undecidable manual Sg 4.4 0
IV.MGAB.HNZ. 2023-08-03T12:50:54.60 0.3 undecidable manual S 276 48.3183 50 0.24 68
IV.CSP1.EHZ. 2023-08-03T12:50:54.50 0.3 undecidable manual S 59 47.619 50 0.32 67
IV.CAFI.HHZ. 2023-08-03T12:50:52.69 0.3 undecidable manual P 311 78.5658 50 0.31 63
IV.FDMO.HHZ. 2023-08-03T12:50:51.00 0.3 undecidable manual S 59 36.3414 50 -0.16 70
IV.ATCC.EHZ. 2023-08-03T12:50:50.80 0.3 undecidable manual S 352 35.4423 50 -0.14 71
IV.MML1.EHZ. 2023-08-03T12:50:50.50 0.3 undecidable manual S 39 34.8429 50 -0.26 69
IV.NRCA.HHZ. 2023-08-03T12:50:50.40 0.3 undecidable manual S 97 33.6441 50 -0.05 72
IV.ARRO.EHZ. 2023-08-03T12:50:50.30 0.3 undecidable manual S 171 32.5452 50 0.15 71
IV.CESX.HHZ. 2023-08-03T12:50:49.10 0.3 undecidable manual S 198 30.4473 50 -0.49 66
IV.FEMA.HNZ. 2023-08-03T12:50:49.60 0.3 undecidable manual S 70 29.9478 50 0.13 72
IT.MTCL.HGZ. 2023-08-03T12:50:48.70 0.3 undecidable manual S 60 27.75 109 -0.11 72
IV.GAVE.HNZ. 2023-08-03T12:50:48.00 0.3 undecidable manual S 142 24.9528 111 0.09 73
IV.MGAB.HNZ. 2023-08-03T12:50:47.73 0.1 undecidable manual P 276 48.3183 50 0.01 95
IV.CSP1.EHZ. 2023-08-03T12:50:47.67 0.1 undecidable manual P 59 47.619 50 0.06 94
IV.CESI.HNZ. 2023-08-03T12:50:47.10 0.3 undecidable manual S 47 22.2555 113 0.08 73
IV.ASSB.HHZ. 2023-08-03T12:50:46.20 0.1 undecidable manual S 349 19.6692 116 0.01 99
IV.NRCA.HHZ. 2023-08-03T12:50:45.36 0.1 undecidable manual P 97 33.6441 50 -0.1 95
IV.ARRO.EHZ. 2023-08-03T12:50:45.72 0.1 undecidable manual P 171 32.5452 50 0.43 89
IV.ATCC.EHZ. 2023-08-03T12:50:45.78 0.1 undecidable manual P 352 35.4423 50 0.04 96
IV.MML1.EHZ. 2023-08-03T12:50:45.48 0.1 undecidable manual P 39 34.8429 50 -0.16 94
IV.FDMO.HHZ. 2023-08-03T12:50:45.80 0.1 undecidable manual P 59 36.3414 50 -0.07 96
IT.MTCL.HGZ. 2023-08-03T12:50:44.36 0.3 undecidable manual P 60 27.75 109 -0.15 71
IV.MOMA.HHZ. 2023-08-03T12:50:44.00 0.3 undecidable manual S 236 12.9759 126 -0.21 72
IV.CESX.HHZ. 2023-08-03T12:50:44.76 0.1 undecidable manual P 198 30.4473 50 -0.2 94
IV.GAVE.HNZ. 2023-08-03T12:50:44.02 0.1 undecidable manual P 142 24.9528 111 0.03 98
IV.FEMA.HNZ. 2023-08-03T12:50:44.95 0.3 undecidable manual P 70 29.9478 50 0.05 73
IT.GNU.HGZ. 2023-08-03T12:50:44.20 0.3 undecidable manual S 236 12.9759 126 -0.01 75
IV.CESI.HNZ. 2023-08-03T12:50:43.60 0.1 undecidable manual P 47 22.2555 113 0.12 97
IV.ASSB.HHZ. 2023-08-03T12:50:42.98 0.1 undecidable manual P 349 19.6692 116 -0.02 99
IT.GNU.HGZ. 2023-08-03T12:50:41.91 0.3 undecidable manual P 236 12.9759 126 0.05 75
IV.MOMA.HHZ. 2023-08-03T12:50:41.90 0.1 undecidable manual P 236 12.9759 126 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.9 0.0008534999999999999 0.22 AML other m 2023-08-03T12:50:44.68
IV.MOMA.HNE. ML:1.9 0.0008095 0.2 AML other m 2023-08-03T12:50:44.68
IV.MOMA.HNN. ML:1.5 0.000338 1.08 AML other m 2023-08-03T12:50:45.18
IV.MOMA.HHN. ML:1.0 0.00010535 0.42 AML other m 2023-08-03T12:50:45.09
IV.ASSB.HHN. ML:1.3 0.00016450000000000001 0.74 AML other m 2023-08-03T12:50:46.28
IV.ATCC.HNE. ML:2.4 0.0009739999999999999 0.5 AML other m 2023-08-03T12:50:46.92
IV.ASSB.HHE. ML:1.4 0.000186 0.5 AML other m 2023-08-03T12:50:47.65
IV.NRCA.HHN. ML:1.7 0.000229 1.08 AML other m 2023-08-03T12:50:50.32
IV.NRCA.HHE. ML:1.8 0.000262 0.1 AML other m 2023-08-03T12:50:50.89
IV.MML1.EHE. ML:1.2 0.0000608 0.42 AML other m 2023-08-03T12:50:50.94
IV.CESX.HHE. ML:1.3 0.0000989 0.82 AML other m 2023-08-03T12:50:51.44
IV.MML1.EHN. ML:1.1 0.00005465000000000001 0.14 AML other m 2023-08-03T12:50:51.12
IV.FDMO.HHE. ML:1.3 0.00007805000000000001 1.04 AML other m 2023-08-03T12:50:51.42
IV.FDMO.HHN. ML:1.4 0.00009285000000000001 1.24 AML other m 2023-08-03T12:50:52.71
IV.ATCC.EHN. ML:1.3 0.00008074999999999998 0.94 AML other m 2023-08-03T12:50:52.19
IV.ATCC.EHE. ML:1.4 0.0001055 1.1 AML other m 2023-08-03T12:50:52.81
IV.CESX.HHN. ML:1.4 0.00011899999999999999 0.48 AML other m 2023-08-03T12:50:52.52
IV.ARRO.EHE. ML:1.0 0.00004075 0.6 AML other m 2023-08-03T12:50:53.41
IV.ARRO.EHN. ML:1.1 0.0000528 0.8 AML other m 2023-08-03T12:50:54.31
IV.CSP1.EHN. ML:1.9 0.00023199999999999997 0.12 AML other m 2023-08-03T12:50:55.01
IV.CSP1.EHE. ML:1.8 0.0001825 0.74 AML other m 2023-08-03T12:50:55.73
IV.ATCC.HNN. ML:1.8 0.00026450000000000003 0.66 AML other m 2023-08-03T12:51:06.82
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