Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 05-04-2023 and time 13:36:24 (Italy) in region 4 km NW Spoleto (PG)

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

  • 05-04-2023 11:36:24 (UTC)
  • 05-04-2023 13:36:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7680, 12.7120 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
Spoleto PG 4 38218 38218
Castel Ritaldi PG 7 3278 41496
Campello sul Clitunno PG 8 2442 43938
Sant'Anatolia di Narco PG 11 564 44502
Scheggino PG 12 461 44963
Vallo di Nera PG 12 364 45327
Trevi PG 13 8469 53796
Giano dell'Umbria PG 13 3846 57642
Montefalco PG 15 5679 63321
Massa Martana PG 15 3770 67091
Acquasparta TR 16 4778 71869
Ferentillo TR 18 1913 73782
Cerreto di Spoleto PG 18 1075 74857
Poggiodomo PG 19 117 74974
Montefranco TR 19 1276 76250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
24 Km N of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
99 Km N of Roma (2864731 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 2023-04-05
11:36:24		 42.7677 12.7115 10 2024-03-01
17:18:06		 Bollettino Sismico Italiano INGV 117042431
Reviewed
Rev100 		ML 1.3 2023-04-05
11:36:24		 42.7615 12.717 11 2023-04-05
12:02:56		 Sala Sismica INGV-Roma 116088101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-05 11:36:24 ± 0.06
Latitude 42.7677 ± 0.0036
Longitude 12.7115 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117042431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 505
Semi-minor axis of confidence ellipse (meter) 330
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.10972
Epicentral distance of station farthest from the epicenter (degree) 0.45146
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 117042431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-05 08:01:03

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 116088101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-05 12:02:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2023-04-05T11:36:41.00 0.3 undecidable manual S 125 50.1165 50 0.37 68
IV.MML1.EHZ. 2023-04-05T11:36:39.10 0.3 undecidable manual S 29 43.8228 50 0.15 72
IV.FDMO.HHZ. 2023-04-05T11:36:38.70 0.3 undecidable manual S 46 42.7239 50 0.04 74
IV.NRCA.HHZ. 2023-04-05T11:36:36.10 0.3 undecidable manual S 77 33.5442 50 -0.13 74
IV.ASSB.HHZ. 2023-04-05T11:36:35.30 0.3 undecidable manual S 352 30.8469 50 -0.19 73
IV.CESI.HHZ. 2023-04-05T11:36:35.40 0.3 undecidable manual S 31 30.6471 50 -0.05 75
IV.LNSS.HHZ. 2023-04-05T11:36:35.70 0.3 undecidable manual S 124 32.4453 50 -0.23 72
IV.MML1.EHZ. 2023-04-05T11:36:33.32 0.3 undecidable manual P 29 43.8228 50 0.41 68
IV.RM33.EHZ. 2023-04-05T11:36:33.75 0.1 undecidable manual P 125 50.1165 50 -0.12 95
IV.CESX.HHZ. 2023-04-05T11:36:32.60 0.3 undecidable manual S 210 20.3685 117 0.03 77
IV.FDMO.HHZ. 2023-04-05T11:36:32.39 1.0 undecidable manual P 46 42.7239 50 -0.34 23
IV.GAVE.EHZ. 2023-04-05T11:36:31.60 0.3 undecidable manual S 119 17.0718 121 0.03 77
IV.ASSB.HHZ. 2023-04-05T11:36:31.09 0.3 undecidable manual P 352 30.8469 50 0.19 73
IV.NRCA.HHZ. 2023-04-05T11:36:31.18 0.1 undecidable manual P 77 33.5442 50 -0.15 98
IV.LNSS.HHZ. 2023-04-05T11:36:30.99 0.1 undecidable manual P 124 32.4453 50 -0.17 98
IV.CESI.HHZ. 2023-04-05T11:36:30.91 0.3 undecidable manual P 31 30.6471 50 0.03 75
IV.MOMA.HHZ. 2023-04-05T11:36:29.80 0.3 undecidable manual S 289 12.1767 130 -0.39 72
IV.CESX.HHZ. 2023-04-05T11:36:29.36 0.3 undecidable manual P 210 20.3685 117 0.14 75
IV.MOMA.HHZ. 2023-04-05T11:36:28.06 0.1 undecidable manual P 289 12.1767 130 0.22 100
IV.GAVE.EHZ. 2023-04-05T11:36:28.64 0.3 undecidable manual P 119 17.0718 121 0 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNE. ML:1.4 0.000282 0.86 AML other m 2023-04-05T11:36:31.50
IV.GAVE.EHN. ML:1.4 0.00021400000000000002 0.58 AML other m 2023-04-05T11:36:32.43
IV.GAVE.EHE. ML:1.5 0.00029000000000000006 0.14 AML other m 2023-04-05T11:36:32.55
IV.CESX.HHE. ML:1.1 0.00010164999999999999 0.24 AML other m 2023-04-05T11:36:33.06
IV.CESX.HHN. ML:1.2 0.000126 0.2 AML other m 2023-04-05T11:36:33.29
IV.ASSB.HHE. ML:1.3 0.00009389999999999999 1.74 AML other m 2023-04-05T11:36:35.07
IV.LNSS.HHE. ML:1.4 0.00011690000000000001 0.14 AML other m 2023-04-05T11:36:36.31
IV.NRCA.HHN. ML:1.2 0.00006825 1.04 AML other m 2023-04-05T11:36:36.72
IV.LNSS.HHN. ML:1.4 0.0001121 0.16 AML other m 2023-04-05T11:36:36.85
IV.ASSB.HHN. ML:1.1 0.00006714938500000001 0.1216 AML other m 2023-04-05T11:36:36.14
IV.NRCA.HHE. ML:1.2 0.00005969509 0.1408 AML other m 2023-04-05T11:36:38.42
IV.MOMA.HHE. ML:1.4 0.00027421225 0.16 AML other m 2023-04-05T11:36:31.49
IV.CESI.HHN. ML:1.2 0.00007820679999999999 0.3776 AML other m 2023-04-05T11:36:37.61
IV.CESI.HHE. ML:0.8 0.000030335911999999998 0.2432 AML other m 2023-04-05T11:36:38.22
IV.FDMO.HHE. ML:0.9 0.000026171344999999998 0.1408 AML other m 2023-04-05T11:36:40.74
IV.MML1.EHN. ML:0.9 0.00002699337 2.7392 AML other m 2023-04-05T11:36:41.72
IV.MML1.HNE. ML:1.4 0.000085478785 1.6064 AML other m 2023-04-05T11:36:39.64
IV.MML1.EHE. ML:1.1 0.00003562432 3.7376 AML other m 2023-04-05T11:36:41.65
IV.RM33.EHE. ML:1.4 0.000064218265 2.0416 AML other m 2023-04-05T11:36:43.41
IV.RM33.EHN. ML:1.3 0.00004868289 2.5792 AML other m 2023-04-05T11:36:43.32
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