Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 21-12-2023 and time 10:43:20 (Italy) in region 3 km NE Spoleto (PG)

A magnitude ML 2.3 earthquake occured in region: 3 km NE Spoleto (PG), on

  • 21-12-2023 09:43:20 (UTC)
  • 21-12-2023 10:43:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7520, 12.7720 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Sant'Anatolia di Narco PG 6 564 38782
Scheggino PG 7 461 39243
Campello sul Clitunno PG 8 2442 41685
Vallo di Nera PG 8 364 42049
Castel Ritaldi PG 11 3278 45327
Poggiodomo PG 14 117 45444
Cerreto di Spoleto PG 14 1075 46519
Trevi PG 14 8469 54988
Ferentillo TR 15 1913 56901
Montefranco TR 17 1276 58177
Giano dell'Umbria PG 18 3846 62023
Monteleone di Spoleto PG 19 599 62622
Montefalco PG 19 5679 68301
Arrone TR 19 2763 71064
Polino TR 19 233 71297
Acquasparta TR 20 4778 76075
Sellano PG 20 1079 77154

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km S of Foligno (57155 inhabitants)
24 Km NE of Terni (111501 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
66 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
77 Km W of Teramo (54892 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
98 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 2.3 2023-12-21
09:43:20		 42.7522 12.7718 9 2023-12-21
09:52:40		 Sala Sismica INGV-Roma 124171701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-21 09:43:20 ± 0.06
Latitude 42.7522 ± 0.0072
Longitude 12.7718 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124171701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 784
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 200
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46405
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 12
Magnitude information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 124171701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-21 09:52:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-12-21T09:43:45.36 3.0 undecidable manual S 0 0
IV.CING.HHZ. 2023-12-21T09:43:45.44 3.0 undecidable manual S -0.21 0
IV.MURB.HHZ. 2023-12-21T09:43:41.30 3.0 undecidable manual S 0.49 0
IV.MF5.EHZ. 2023-12-21T09:43:41.56 3.0 undecidable manual S 0.47 0
IV.SRES.HHZ. 2023-12-21T09:43:41.99 3.0 undecidable manual S 0.35 0
IV.FIAM.HHZ. 2023-12-21T09:43:40.96 3.0 undecidable manual S -0.33 0
IV.GUMA.HHZ. 2023-12-21T09:43:40.25 3.0 undecidable manual S 0.51 0
IV.FOSV.EHZ. 2023-12-21T09:43:40.47 3.0 undecidable manual S -0.23 0
IV.ATCC.EHZ. 2023-12-21T09:43:37.45 0.3 undecidable manual S 347 49.2174 50 0.69 61
IV.CSP1.EHZ. 2023-12-21T09:43:37.68 0.6 undecidable manual S 43 51.5151 50 0.29 46
IV.PIEI.HHZ. 2023-12-21T09:43:36.36 3.0 undecidable manual P -0.39 0
IV.ATMI.HHZ. 2023-12-21T09:43:36.86 3.0 negative manual P 2.12 0
IV.CAFI.HHZ. 2023-12-21T09:43:36.81 3.0 positive manual P -0.51 0
IV.NARO.HHZ. 2023-12-21T09:43:35.51 3.0 undecidable manual P -2.48 0
IV.MML1.EHZ. 2023-12-21T09:43:35.29 0.3 undecidable manual S 22 43.2234 50 0.12 72
IV.MC2.EHE. 2023-12-21T09:43:34.42 0.6 undecidable manual S 62 38.2284 50 0.58 43
IV.SSFR.HHZ. 2023-12-21T09:43:34.23 3.0 negative manual P -0.29 0
IV.FDMO.HHZ. 2023-12-21T09:43:34.36 0.3 undecidable manual S 39 40.626 50 -0.12 73
IV.CING.HHZ. 2023-12-21T09:43:34.37 3.0 negative manual P -0.31 0
IV.ATFO.HHZ. 2023-12-21T09:43:33.35 3.0 positive manual P -0.24 0
IV.MF5.EHZ. 2023-12-21T09:43:32.37 3.0 negative manual P 0.25 0
IV.TERO.HHZ. 2023-12-21T09:43:32.66 3.0 positive manual P -0.84 0
IT.MTCL.HGE. 2023-12-21T09:43:32.13 0.3 undecidable manual S 35 32.5452 50 -0.2 73
IV.ASSB.HHZ. 2023-12-21T09:43:32.60 0.6 undecidable manual S 344 33.5442 50 0.03 50
IV.FEMA.HNE. 2023-12-21T09:43:32.37 0.3 undecidable manual S 44 32.4453 50 0.08 74
IV.MGAB.HHZ. 2023-12-21T09:43:31.79 3.0 negative manual P 0.19 0
IV.MURB.HHZ. 2023-12-21T09:43:31.73 3.0 positive manual P -0.23 0
IV.FIAM.HHZ. 2023-12-21T09:43:31.82 3.0 positive manual P -0.41 0
IV.GUMA.HHZ. 2023-12-21T09:43:31.76 3.0 negative manual P 0.4 0
IV.FOSV.EHZ. 2023-12-21T09:43:31.96 3.0 positive manual P 0.06 0
IV.ATCC.EHZ. 2023-12-21T09:43:30.01 0.3 undecidable manual P 347 49.2174 50 0.02 73
IV.CSP1.EHZ. 2023-12-21T09:43:30.21 0.3 undecidable manual P 43 51.5151 50 -0.14 71
IV.SNTG.HHZ. 2023-12-21T09:43:30.92 3.0 undecidable manual P -0.48 0
IV.MMO1.EHZ. 2023-12-21T09:43:29.56 3.0 negative manual P -0.28 0
IV.RM33.EHZ. 2023-12-21T09:43:29.09 3.0 negative manual P -0.44 0
IV.SMA1.EHZ. 2023-12-21T09:43:29.75 3.0 negative manual P -0.17 0
IV.ARRO.EHE. 2023-12-21T09:43:28.66 0.6 undecidable manual S 181 19.1697 115 0.55 45
IV.MML1.EHZ. 2023-12-21T09:43:28.71 0.3 undecidable manual P 22 43.2234 50 -0.36 69
IV.FDMO.HHZ. 2023-12-21T09:43:28.59 0.3 undecidable manual P 39 40.626 50 -0.08 73
IV.MC2.EHE. 2023-12-21T09:43:28.28 0.1 undecidable manual P 62 38.2284 50 -0.02 99
IV.CESX.HHZ. 2023-12-21T09:43:28.76 0.6 undecidable manual S 224 21.9669 113 -0.22 49
IT.MTCL.HGE. 2023-12-21T09:43:27.14 0.3 undecidable manual P 35 32.5452 50 -0.29 71
IV.ASSB.HHZ. 2023-12-21T09:43:27.26 0.1 undecidable manual P 344 33.5442 50 -0.31 94
IV.FEMA.HNE. 2023-12-21T09:43:27.37 0.1 undecidable manual P 44 32.4453 50 -0.04 100
IT.GNU.HGE. 2023-12-21T09:43:27.81 0.3 undecidable manual S 289 17.3715 118 0.26 74
IV.LNSS.HHZ. 2023-12-21T09:43:26.31 3.0 positive manual Pg 0.02 0
IV.CESI.HHZ. 2023-12-21T09:43:26.74 3.0 positive manual Pg 0.18 0
IV.NRCA.HHZ. 2023-12-21T09:43:26.56 3.0 negative manual Pg 0.13 0
IV.ARRO.EHE. 2023-12-21T09:43:25.11 0.3 undecidable manual P 181 19.1697 115 0.12 75
IV.GAVE.EHZ. 2023-12-21T09:43:25.99 0.3 undecidable manual S 124 11.9769 127 0.03 78
IV.CESX.HHZ. 2023-12-21T09:43:25.24 0.3 undecidable manual P 224 21.9669 113 -0.26 73
IV.MOMA.HHZ. 2023-12-21T09:43:24.57 3.0 positive manual Pn 0.03 0
IT.GNU.HGE. 2023-12-21T09:43:24.60 0.3 undecidable manual P 289 17.3715 118 -0.07 77
IV.GAVE.EHZ. 2023-12-21T09:43:23.72 0.3 undecidable manual P 124 11.9769 127 -0.03 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:2.9 0.009535 0.86 AML other m 2023-12-21T09:43:26.82
IV.GAVE.EHE. ML:2.9 0.009190000000000002 0.86 AML other m 2023-12-21T09:43:26.82
IV.GAVE.EHN. ML:2.8 0.007640000000000001 1.44 AML other m 2023-12-21T09:43:27.08
IV.GAVE.HNN. ML:2.3 0.002215 1.46 AML other m 2023-12-21T09:43:27.08
IV.MOMA.HNE. ML:2.5 0.002685 0.2 AML other m 2023-12-21T09:43:28.78
IV.MOMA.HHN. ML:2.4 0.002055 0.2 AML other m 2023-12-21T09:43:28.68
IV.MOMA.HNN. ML:2.2 0.00127 0.16 AML other m 2023-12-21T09:43:29.38
IV.MOMA.HHE. ML:2.4 0.002065 0.64 AML other m 2023-12-21T09:43:29.78
IV.CESX.HHE. ML:2.4 0.0016950000000000001 1.46 AML other m 2023-12-21T09:43:30.10
IV.CESX.HHN. ML:2.4 0.001765 0.52 AML other m 2023-12-21T09:43:30.41
IV.LNSS.HHN. ML:2.5 0.00175 0.36 AML other m 2023-12-21T09:43:31.15
IV.CESI.HHN. ML:2.5 0.0016099999999999999 0.22 AML other m 2023-12-21T09:43:31.61
IV.CESI.HHE. ML:2.4 0.0012309999999999999 1.1 AML other m 2023-12-21T09:43:32.71
IV.NRCA.HHE. ML:2.4 0.0012900000000000001 0.98 AML other m 2023-12-21T09:43:32.28
IV.ASSB.HHN. ML:2.1 0.0005909999999999999 0.78 AML other m 2023-12-21T09:43:33.41
IV.ASSB.HHE. ML:2.3 0.0008825 0.74 AML other m 2023-12-21T09:43:33.12
IV.LNSS.HHE. ML:2.5 0.001565 1.46 AML other m 2023-12-21T09:43:33.76
IV.NRCA.HHN. ML:2.2 0.0009265000000000001 0.12 AML other m 2023-12-21T09:43:34.12
IV.FDMO.HHE. ML:2.3 0.0006990000000000001 0.46 AML other m 2023-12-21T09:43:35.23
IV.FDMO.HHN. ML:2.2 0.0005055 0.6 AML other m 2023-12-21T09:43:35.28
IV.MML1.HNN. ML:2.1 0.00040100000000000004 0.18 AML other m 2023-12-21T09:43:35.61
IV.MML1.EHN. ML:2.1 0.00041900000000000005 0.54 AML other m 2023-12-21T09:43:35.61
IV.MML1.EHE. ML:2.2 0.0005340000000000001 0.32 AML other m 2023-12-21T09:43:36.53
IV.MML1.HNE. ML:2.2 0.0005365 0.48 AML other m 2023-12-21T09:43:36.53
IV.MMO1.EHE. ML:2.1 0.0003785 1.2 AML other m 2023-12-21T09:43:37.13
IV.CSP1.EHN. ML:2.8 0.00146 1.5 AML other m 2023-12-21T09:43:37.20
IV.ATCC.EHE. ML:2.2 0.0004525 1.2 AML other m 2023-12-21T09:43:38.71
IV.SMA1.EHE. ML:2.4 0.0006839999999999999 0.36 AML other m 2023-12-21T09:43:38.17
IV.CSP1.EHE. ML:2.8 0.0017050000000000001 1.3 AML other m 2023-12-21T09:43:38.32
IV.RM33.EHN. ML:2.2 0.000512 0.36 AML other m 2023-12-21T09:43:38.83
IV.SMA1.EHN. ML:2.2 0.00045650000000000004 0.52 AML other m 2023-12-21T09:43:39.39
IV.MMO1.EHN. ML:2.3 0.0005105000000000001 0.42 AML other m 2023-12-21T09:43:39.88
IV.ATCC.EHN. ML:2.3 0.0005645 0.7 AML other m 2023-12-21T09:43:39.84
IV.GUMA.HHN. ML:2.4 0.0005745 0.68 AML other m 2023-12-21T09:43:40.18
IV.SNTG.HHN. ML:1.9 0.000177 0.12 AML other m 2023-12-21T09:43:40.30
IV.SNTG.HHE. ML:1.8 0.00015099999999999998 0.28 AML other m 2023-12-21T09:43:40.53
IV.FOSV.HNE. ML:2.0 0.00018449999999999999 0.52 AML other m 2023-12-21T09:43:42.19
IV.MURB.HHN. ML:2.6 0.0007624999999999999 0.98 AML other m 2023-12-21T09:43:42.69
IV.MURB.HNN. ML:2.6 0.0008165 0.96 AML other m 2023-12-21T09:43:42.71
IV.GUMA.HHE. ML:2.6 0.000814 0.32 AML other m 2023-12-21T09:43:42.84
IV.MURB.HHE. ML:2.8 0.00118 1.66 AML other m 2023-12-21T09:43:43.16
IV.MURB.HNE. ML:2.7 0.0011330000000000001 0.32 AML other m 2023-12-21T09:43:43.16
IV.RM33.EHE. ML:2.1 0.000381 0.52 AML other m 2023-12-21T09:43:43.25
IV.MF5.EHE. ML:2.0 0.00017999999999999998 0.56 AML other m 2023-12-21T09:43:43.25
IV.FOSV.HNN. ML:1.9 0.00017999999999999998 0.92 AML other m 2023-12-21T09:43:43.55
IV.FOSV.EHN. ML:1.8 0.000134 0.92 AML other m 2023-12-21T09:43:43.55
IV.FIAM.HHN. ML:2.0 0.000202 1 AML other m 2023-12-21T09:43:43.22
IV.TERO.HHN. ML:1.8 0.0001046 0.38 AML other m 2023-12-21T09:43:44.49
IV.FOSV.EHE. ML:1.8 0.0001325 1.24 AML other m 2023-12-21T09:43:44.24
IV.FIAM.HHE. ML:2.1 0.0002595 0.48 AML other m 2023-12-21T09:43:45.26
IV.CING.HHN. ML:2.2 0.0002535 0.24 AML other m 2023-12-21T09:43:45.52
IV.TERO.HHE. ML:1.8 0.000111 0.4 AML other m 2023-12-21T09:43:45.52
IV.CING.HHE. ML:2.0 0.000134 0.14 AML other m 2023-12-21T09:43:45.81
IV.MF5.EHN. ML:2.1 0.00023799999999999998 0.4 AML other m 2023-12-21T09:43:47.75
IV.ATFO.HHN. ML:2.0 0.0001545 1.48 AML other m 2023-12-21T09:43:48.81
IV.ATFO.HHE. ML:2.1 0.0002035 0.72 AML other m 2023-12-21T09:43:50.38
IV.CAFI.HHE. ML:2.0 0.00011360000000000001 0.76 AML other m 2023-12-21T09:43:51.79
IV.CAFI.HHN. ML:2.0 0.00011005 0.74 AML other m 2023-12-21T09:43:52.32
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
Waveforms Seismic signals in miniseed + resp format Download