Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 25-10-2023 and time 22:30:18 (Italy) in region 3 km NW Spoleto (PG)

A magnitude ML 2.1 earthquake occured in region: 3 km NW Spoleto (PG), on

  • 25-10-2023 20:30:18 (UTC)
  • 25-10-2023 22:30:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7620, 12.7190 at 11 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
Spoleto PG 3 38218 38218
Castel Ritaldi PG 8 3278 41496
Campello sul Clitunno PG 8 2442 43938
Sant'Anatolia di Narco PG 10 564 44502
Scheggino PG 11 461 44963
Vallo di Nera PG 12 364 45327
Trevi PG 13 8469 53796
Giano dell'Umbria PG 14 3846 57642
Montefalco PG 16 5679 63321
Massa Martana PG 16 3770 67091
Acquasparta TR 16 4778 71869
Ferentillo TR 17 1913 73782
Cerreto di Spoleto PG 17 1075 74857
Poggiodomo PG 19 117 74974
Montefranco TR 19 1276 76250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km S of Foligno (57155 inhabitants)
23 Km N of Terni (111501 inhabitants)
47 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
89 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
Reviewed
Rev100 		ML 2.1 2023-10-25
20:30:18		 42.7625 12.7188 11 2023-10-25
20:36:50		 Sala Sismica INGV-Roma 122388771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-25 20:30:18 ± 0.03
Latitude 42.7625 ± 0.0018
Longitude 12.7188 ± 0.0024
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122388771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 216
Semi-minor axis of confidence ellipse (meter) 157
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 227
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46945
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 10
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 60
Type of magnitude ML
Reference to an origin 122388771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-25 20:36:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHZ. 2023-10-25T20:30:47.21 3.0 undecidable manual S -0.16 0
IV.ARVD.HHZ. 2023-10-25T20:30:45.18 3.0 undecidable manual S 0.41 0
IV.CING.HHZ. 2023-10-25T20:30:43.03 3.0 undecidable manual S -0.28 0
IV.MF5.EHZ. 2023-10-25T20:30:40.41 3.0 undecidable manual S 0.73 0
IV.FIAM.HHZ. 2023-10-25T20:30:38.26 3.0 undecidable manual S -0.71 0
IV.SRES.HHZ. 2023-10-25T20:30:38.53 3.0 undecidable manual S 0.81 0
IV.CSP1.EHZ. 2023-10-25T20:30:35.75 3.0 undecidable manual S -0.5 0
IV.T0110.HHZ. 2023-10-25T20:30:35.96 3.0 negative manual P -0.09 0
IV.ATPI.EHZ. 2023-10-25T20:30:34.65 3.0 positive manual P 2.37 0
IV.FAGN.HHZ. 2023-10-25T20:30:34.30 3.0 positive manual P 0.26 0
IV.CERT.HHZ. 2023-10-25T20:30:33.65 3.0 positive manual P -0.72 0
IV.CAFI.HHZ. 2023-10-25T20:30:33.59 3.0 undecidable manual P 0.21 0
IV.ATFO.HHZ. 2023-10-25T20:30:32.97 3.0 undecidable manual P 2.72 0
IV.ARVD.HHZ. 2023-10-25T20:30:32.71 3.0 positive manual P -0.2 0
IV.TERO.HHZ. 2023-10-25T20:30:31.14 3.0 positive manual P -0.33 0
IV.GIGS.HHZ. 2023-10-25T20:30:31.75 3.0 positive manual P -0.34 0
IV.PIEI.HHZ. 2023-10-25T20:30:31.14 3.0 undecidable manual P -2.26 0
IV.ATMI.HHZ. 2023-10-25T20:30:31.47 3.0 undecidable manual P 0.44 0
IV.MF5.EHZ. 2023-10-25T20:30:30.31 3.0 negative manual P 0.26 0
IV.GUMA.HHZ. 2023-10-25T20:30:29.22 3.0 positive manual P 0.03 0
IV.LNSS.HHZ. 2023-10-25T20:30:29.18 0.3 undecidable manual S 124 31.6461 50 0.09 71
IV.FIAM.HHZ. 2023-10-25T20:30:29.35 3.0 positive manual P -0.3 0
IV.SRES.HHZ. 2023-10-25T20:30:29.71 3.0 negative manual P 0.76 0
IV.CESI.HHZ. 2023-10-25T20:30:28.92 0.3 undecidable manual S 29 30.8469 50 0.04 72
IV.ASSB.HHZ. 2023-10-25T20:30:28.97 0.3 undecidable manual S 351 31.4463 50 -0.07 72
IV.SNTG.HHZ. 2023-10-25T20:30:28.45 3.0 positive manual P -0.18 0
IV.MMO1.EHZ. 2023-10-25T20:30:27.59 3.0 positive manual P -0.24 0
IV.ATCC.EHZ. 2023-10-25T20:30:27.04 0.3 undecidable manual P 352 47.3193 50 0.16 68
IV.MGAB.HHZ. 2023-10-25T20:30:27.86 0.3 undecidable manual P 289 52.1034 50 0.24 67
IV.SMA1.EHZ. 2023-10-25T20:30:27.83 3.0 positive manual P -0.08 0
IV.CSP1.EHZ. 2023-10-25T20:30:27.16 3.0 undecidable manual P -0.96 0
IV.MML1.EHZ. 2023-10-25T20:30:26.34 0.3 undecidable manual P 28 44.0226 50 -0.03 71
IV.FDMO.HHZ. 2023-10-25T20:30:26.12 3.0 positive manual P -0.17 0
IV.GAVE.EHZ. 2023-10-25T20:30:25.00 0.3 undecidable manual S 119 16.2726 124 0.07 74
IV.CESX.HHZ. 2023-10-25T20:30:25.98 0.3 undecidable manual S 212 20.1687 50 -0.06 73
IV.RM33.EHZ. 2023-10-25T20:30:25.61 3.0 positive manual P -1.75 0
IV.NRCA.HHZ. 2023-10-25T20:30:24.61 3.0 positive manual P -0.2 0
IT.GNU.HGZ. 2023-10-25T20:30:24.14 0.3 undecidable manual S 291 12.9759 130 0.14 73
IV.CESI.HHZ. 2023-10-25T20:30:24.26 0.3 undecidable manual P 29 30.8469 50 -0.08 72
IV.ASSB.HHZ. 2023-10-25T20:30:24.31 0.3 undecidable manual P 351 31.4463 50 -0.12 71
IV.LNSS.HHZ. 2023-10-25T20:30:24.44 0.1 undecidable manual P 124 31.6461 50 -0.02 96
IV.MOMA.HHZ. 2023-10-25T20:30:23.88 0.3 undecidable manual S 291 12.9759 130 -0.13 73
IV.CESX.HHZ. 2023-10-25T20:30:22.64 0.3 undecidable manual P 212 20.1687 50 -0.06 73
IV.MOMA.HHZ. 2023-10-25T20:30:21.53 0.1 undecidable manual P 291 12.9759 130 0 100
IT.GNU.HGZ. 2023-10-25T20:30:21.52 0.1 undecidable manual P 291 12.9759 130 0 100
IV.GAVE.EHZ. 2023-10-25T20:30:21.97 0.3 undecidable manual P 119 16.2726 124 -0.09 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IT.GNU.HGN. ML:4.0 0.09209999999999999 0.54 AML other m 2023-10-25T20:30:24.47
IV.MOMA.HNE. ML:2.4 0.002445 1.4 AML other m 2023-10-25T20:30:24.27
IV.MOMA.HHE. ML:2.3 0.00227 0.6 AML other m 2023-10-25T20:30:24.97
IT.GNU.HGE. ML:4.0 0.09687767500000001 0.1024 AML other m 2023-10-25T20:30:25.10
IV.MOMA.HNN. ML:2.2 0.001715 0.54 AML other m 2023-10-25T20:30:25.49
IV.MOMA.HHN. ML:2.2 0.00172 0.66 AML other m 2023-10-25T20:30:25.62
IV.GAVE.HNN. ML:1.8 0.0005295000000000001 0.44 AML other m 2023-10-25T20:30:25.99
IV.GAVE.EHN. ML:2.3 0.0016899999999999999 1.84 AML other m 2023-10-25T20:30:25.07
IV.GAVE.EHE. ML:2.4 0.002205 0.12 AML other m 2023-10-25T20:30:26.36
IV.GAVE.HNE. ML:2.4 0.0021550000000000002 0.16 AML other m 2023-10-25T20:30:26.36
IV.CESX.HHE. ML:2.1 0.0009504999999999998 0.22 AML other m 2023-10-25T20:30:26.57
IV.CESX.HHN. ML:2.3 0.0013700000000000001 0.24 AML other m 2023-10-25T20:30:26.71
IV.ASSB.HHE. ML:2.3 0.0008525000000000001 0.32 AML other m 2023-10-25T20:30:29.63
IV.LNSS.HHE. ML:2.2 0.0008455 0.48 AML other m 2023-10-25T20:30:29.60
IV.LNSS.HNE. ML:2.3 0.000874 0.52 AML other m 2023-10-25T20:30:29.61
IV.LNSS.HNN. ML:2.3 0.0008914999999999999 1.22 AML other m 2023-10-25T20:30:30.26
IV.LNSS.HHN. ML:2.3 0.0009239999999999999 0.16 AML other m 2023-10-25T20:30:30.26
IV.ASSB.HHN. ML:2.0 0.0005 0.48 AML other m 2023-10-25T20:30:30.94
IV.NRCA.HHE. ML:2.1 0.0005645 0.76 AML other m 2023-10-25T20:30:30.60
IV.CESI.HHE. ML:1.8 0.0003175 1.56 AML other m 2023-10-25T20:30:31.86
IV.CESI.HNE. ML:1.8 0.000328 1.56 AML other m 2023-10-25T20:30:31.09
IV.CESI.HHN. ML:2.1 0.000623 0.34 AML other m 2023-10-25T20:30:31.11
IV.CESI.HNN. ML:2.2 0.0006599999999999999 0.36 AML other m 2023-10-25T20:30:31.11
IV.NRCA.HHN. ML:2.1 0.0005380000000000001 0.76 AML other m 2023-10-25T20:30:31.21
IV.FDMO.HHN. ML:1.8 0.00021250000000000002 1.16 AML other m 2023-10-25T20:30:32.38
IV.FDMO.HHE. ML:2.0 0.00028050000000000004 1 AML other m 2023-10-25T20:30:33.45
IV.MML1.EHN. ML:1.7 0.000155 0.28 AML other m 2023-10-25T20:30:34.73
IV.ATCC.EHE. ML:2.1 0.00033150000000000003 0.46 AML other m 2023-10-25T20:30:35.45
IV.ATCC.HNE. ML:2.1 0.000348 0.44 AML other m 2023-10-25T20:30:35.23
IV.MMO1.EHN. ML:2.1 0.00032 1.34 AML other m 2023-10-25T20:30:35.02
IV.ATCC.HNN. ML:2.0 0.00029200000000000005 0.74 AML other m 2023-10-25T20:30:36.44
IV.ATCC.EHN. ML:2.0 0.0003015 0.66 AML other m 2023-10-25T20:30:36.40
IV.MML1.EHE. ML:1.8 0.00017649999999999998 0.7 AML other m 2023-10-25T20:30:36.16
IV.CSP1.EHE. ML:2.4 0.000696 0.24 AML other m 2023-10-25T20:30:36.20
IV.MMO1.EHE. ML:2.1 0.0003179999999999999 1 AML other m 2023-10-25T20:30:36.07
IV.MGAB.HHN. ML:2.2 0.0003605 0.72 AML other m 2023-10-25T20:30:36.22
IV.MGAB.HNN. ML:2.2 0.000383 0.94 AML other m 2023-10-25T20:30:36.46
IV.CSP1.EHN. ML:2.4 0.000586 0.28 AML other m 2023-10-25T20:30:36.84
IV.SMA1.EHE. ML:2.2 0.000352 0.24 AML other m 2023-10-25T20:30:37.07
IV.MGAB.HHE. ML:2.1 0.000338 0.62 AML other m 2023-10-25T20:30:37.20
IV.GUMA.HHE. ML:2.3 0.00040149999999999995 0.64 AML other m 2023-10-25T20:30:38.32
IV.SMA1.EHN. ML:2.0 0.0002615 0.46 AML other m 2023-10-25T20:30:38.39
IV.SNTG.HHN. ML:1.6 0.0000873 0.14 AML other m 2023-10-25T20:30:38.41
IV.SNTG.HHE. ML:1.6 0.00007999999999999999 0.86 AML other m 2023-10-25T20:30:38.42
IV.MGAB.HNE. ML:2.1 0.00030199999999999997 0.54 AML other m 2023-10-25T20:30:39.58
IV.SRES.HHE. ML:1.6 0.0000735 0.7 AML other m 2023-10-25T20:30:39.82
IV.GUMA.HNE. ML:2.2 0.0003665 0.64 AML other m 2023-10-25T20:30:40.88
IV.GUMA.HHN. ML:2.1 0.0002735 0.24 AML other m 2023-10-25T20:30:41.03
IV.SRES.HHN. ML:1.6 0.0000727 0.62 AML other m 2023-10-25T20:30:41.09
IV.GUMA.HNN. ML:2.1 0.000272 0.42 AML other m 2023-10-25T20:30:41.33
IV.TERO.HHN. ML:1.7 0.000084 0.12 AML other m 2023-10-25T20:30:43.22
IV.TERO.HHE. ML:1.6 0.00006465 1.22 AML other m 2023-10-25T20:30:43.71
IV.FIAM.HHE. ML:1.6 0.00008335 0.3 AML other m 2023-10-25T20:30:44.15
IV.FIAM.HHN. ML:1.6 0.0000843 0.84 AML other m 2023-10-25T20:30:44.19
IV.GIGS.HHE. ML:1.2 0.000025349999999999996 0.46 AML other m 2023-10-25T20:30:45.59
IV.ATMI.HHE. ML:2.4 0.000404 0.42 AML other m 2023-10-25T20:30:45.48
IV.GIGS.HHN. ML:1.2 0.00002565 0.9 AML other m 2023-10-25T20:30:45.52
IV.ATMI.HHN. ML:2.4 0.0003585 0.36 AML other m 2023-10-25T20:30:46.72
IV.CAFI.HHE. ML:1.7 0.000054449999999999995 0.88 AML other m 2023-10-25T20:30:48.82
IV.CAFI.HHN. ML:1.8 0.0000675 1.04 AML other m 2023-10-25T20:30:49.64
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
Waveforms Seismic signals in miniseed + resp format Download