Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 07-12-2023 and time 02:19:08 (Italy) in region 3 km NE Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km NE Spoleto (PG), on

  • 07-12-2023 01:19:08 (UTC)
  • 07-12-2023 02:19:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7510, 12.7630 at 8 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
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
Trevi PG 14 8469 53796
Ferentillo TR 15 1913 55709
Poggiodomo PG 15 117 55826
Cerreto di Spoleto PG 15 1075 56901
Montefranco TR 17 1276 58177
Giano dell'Umbria PG 18 3846 62023
Montefalco PG 18 5679 67702
Arrone TR 19 2763 70465
Acquasparta TR 19 4778 75243
Monteleone di Spoleto PG 19 599 75842
Polino TR 20 233 76075
Massa Martana PG 20 3770 79845

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Terni (111501 inhabitants)
23 Km S of Foligno (57155 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
83 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 1.4 2023-12-07
01:19:08		 42.7508 12.7632 8 2023-12-07
01:55:07		 Sala Sismica INGV-Roma 123863111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-07 01:19:08 ± 0.05
Latitude 42.7508 ± 0.0027
Longitude 12.7632 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123863111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 240
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
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) 69
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.56208
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 123863111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-07 01:55:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2023-12-07T01:19:35.59 3.0 undecidable manual S 0.09 0
IV.FIAM.HHZ. 2023-12-07T01:19:28.46 3.0 undecidable manual S -0.27 0
IV.MMO1.EHZ. 2023-12-07T01:19:24.67 0.6 undecidable manual S 70 48.7179 50 0.13 46
IV.RM33.EHZ. 2023-12-07T01:19:23.45 0.6 undecidable manual S 126 45.621 50 -0.24 46
IV.FDMO.HHZ. 2023-12-07T01:19:22.62 0.6 undecidable manual S 40 41.2254 50 0.09 48
IV.MF5.EHZ. 2023-12-07T01:19:20.25 0.3 undecidable manual P 65 62.3931 50 0.41 64
IV.ASSB.HHZ. 2023-12-07T01:19:20.38 0.6 undecidable manual S 345 33.4443 104 -0.02 49
IV.NRCA.HHZ. 2023-12-07T01:19:19.22 0.6 undecidable manual S 72 30.0477 105 -0.02 49
IV.CESI.HHZ. 2023-12-07T01:19:19.36 0.6 undecidable manual S 22 30.4473 105 -0.02 49
IV.CSP1.EHZ. 2023-12-07T01:19:18.27 3.0 positive manual P -0.09 0
IV.LNSS.HHZ. 2023-12-07T01:19:18.49 0.6 undecidable manual S 126 27.9498 106 -0.05 49
IV.RM33.EHZ. 2023-12-07T01:19:17.21 0.3 undecidable manual P 126 45.621 50 -0.04 72
IV.MMO1.EHZ. 2023-12-07T01:19:17.57 0.1 negative manual P 70 48.7179 50 -0.16 92
IV.SMA1.EHZ. 2023-12-07T01:19:17.77 0.3 undecidable manual P 106 48.5181 50 0.07 71
IV.FDMO.HHZ. 2023-12-07T01:19:16.50 0.3 undecidable manual P 40 41.2254 50 -0.07 72
IV.MML1.EHZ. 2023-12-07T01:19:16.91 3.0 negative manual P -0.01 0
IV.ASSB.HHZ. 2023-12-07T01:19:15.15 0.3 undecidable manual P 345 33.4443 104 -0.19 71
IV.ARRO.EHZ. 2023-12-07T01:19:15.28 0.6 undecidable manual S 179 19.0698 113 -0.35 47
IV.LNSS.HHZ. 2023-12-07T01:19:14.15 0.1 undecidable manual P 126 27.9498 106 -0.12 97
IV.NRCA.HHZ. 2023-12-07T01:19:14.57 0.1 negative manual P 72 30.0477 105 -0.1 97
IV.CESI.HHZ. 2023-12-07T01:19:14.70 0.1 undecidable manual P 22 30.4473 105 -0.06 98
IV.GAVE.EHZ. 2023-12-07T01:19:13.73 0.6 undecidable manual S 121 12.4764 123 0.1 50
IV.CESX.HHZ. 2023-12-07T01:19:13.01 0.1 undecidable manual P 222 21.3675 111 -0.01 100
IV.ARRO.EHZ. 2023-12-07T01:19:12.80 0.1 undecidable manual P 179 19.0698 113 0.21 96
IV.MOMA.HHZ. 2023-12-07T01:19:12.27 0.1 undecidable manual P 291 16.7721 116 0.09 99
IV.GAVE.EHZ. 2023-12-07T01:19:11.68 0.1 undecidable manual P 121 12.4764 123 0.24 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.7 0.0005565 0.14 AML other m 2023-12-07T01:19:14.26
IV.GAVE.EHE. ML:1.8 0.0007949999999999999 1.18 AML other m 2023-12-07T01:19:14.77
IV.MOMA.HHE. ML:1.4 0.00022950000000000002 0.38 AML other m 2023-12-07T01:19:16.13
IV.MOMA.HHN. ML:1.3 0.000184 0.5 AML other m 2023-12-07T01:19:16.76
IV.ARRO.EHN. ML:1.1 0.00010255 1 AML other m 2023-12-07T01:19:17.53
IV.ARRO.EHE. ML:1.2 0.0001295 0.76 AML other m 2023-12-07T01:19:17.61
IV.LNSS.HHE. ML:1.7 0.000284 1.38 AML other m 2023-12-07T01:19:19.89
IV.LNSS.HNE. ML:1.8 0.000365 1.38 AML other m 2023-12-07T01:19:19.90
IV.CESX.HHN. ML:1.2 0.0001245 0.28 AML other m 2023-12-07T01:19:19.30
IV.CESI.HHN. ML:1.6 0.0001705 0.2 AML other m 2023-12-07T01:19:19.72
IV.NRCA.HHE. ML:1.4 0.0001375 0.48 AML other m 2023-12-07T01:19:19.50
IV.LNSS.HHN. ML:1.7 0.00027350000000000003 0.16 AML other m 2023-12-07T01:19:19.78
IV.CESX.HHE. ML:1.2 0.0001073 1 AML other m 2023-12-07T01:19:19.31
IV.CESI.HHE. ML:1.3 0.00009945 1.26 AML other m 2023-12-07T01:19:20.74
IV.NRCA.HHN. ML:1.4 0.000123 1.68 AML other m 2023-12-07T01:19:20.86
IV.LNSS.HNN. ML:1.7 0.000293 0.4 AML other m 2023-12-07T01:19:21.21
IV.ASSB.HHE. ML:1.4 0.00010839999999999999 1.46 AML other m 2023-12-07T01:19:21.02
IV.ASSB.HHN. ML:1.3 0.0000821 0.56 AML other m 2023-12-07T01:19:21.02
IV.MML1.EHN. ML:1.2 0.00004445 0.56 AML other m 2023-12-07T01:19:23.45
IV.FDMO.HHN. ML:1.2 0.00005105 0.64 AML other m 2023-12-07T01:19:24.36
IV.FDMO.HHE. ML:1.4 0.0000727 1.52 AML other m 2023-12-07T01:19:24.80
IV.MML1.EHE. ML:1.4 0.00007145 1.1 AML other m 2023-12-07T01:19:25.62
IV.RM33.EHE. ML:1.3 0.0000653 0.92 AML other m 2023-12-07T01:19:25.35
IV.RM33.EHN. ML:1.3 0.000053649999999999996 0.46 AML other m 2023-12-07T01:19:27.07
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