Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 17-02-2023 and time 06:16:35 (UTC) in region 2 km SE Spoleto (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km SE Spoleto (PG), on

  • 17-02-2023 06:16:35 (UTC)
  • 17-02-2023 07:16:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7230, 12.7630 at 13 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 2 38218 38218
Scheggino PG 6 461 38679
Sant'Anatolia di Narco PG 6 564 39243
Vallo di Nera PG 10 364 39607
Campello sul Clitunno PG 11 2442 42049
Ferentillo TR 12 1913 43962
Castel Ritaldi PG 13 3278 47240
Montefranco TR 14 1276 48516
Poggiodomo PG 14 117 48633
Arrone TR 16 2763 51396
Cerreto di Spoleto PG 17 1075 52471
Polino TR 17 233 52704
Trevi PG 17 8469 61173
Monteleone di Spoleto PG 17 599 61772
Acquasparta TR 18 4778 66550
Giano dell'Umbria PG 20 3846 70396

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Terni (111501 inhabitants)
26 Km S of Foligno (57155 inhabitants)
53 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
77 Km W of Teramo (54892 inhabitants)
80 Km N of Guidonia Montecelio (88673 inhabitants)
84 Km N of Tivoli (56533 inhabitants)
95 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 0.9 2023-02-17
06:16:35		 42.723 12.763 13 2024-03-01
17:18:09		 Bollettino Sismico Italiano INGV 117632921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-17 06:16:35 ± 0.11
Latitude 42.7230 ± 0.0045
Longitude 12.7630 ± 0.0049
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117632921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 457
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.10162
Epicentral distance of station farthest from the epicenter (degree) 0.39300
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 117632921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-23 13:26:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2023-02-17T06:16:50.12 0.3 undecidable manual S 37 43.623 93 0.25 71
IV.CESI.HHZ. 2023-02-17T06:16:47.20 0.3 undecidable manual S 20 33.3444 95 0.08 75
IV.NRCA.HHZ. 2023-02-17T06:16:46.41 0.3 undecidable manual S 67 31.1466 95 -0.12 75
IV.LNSS.HHZ. 2023-02-17T06:16:45.21 0.3 undecidable manual S 120 26.2515 97 -0.03 77
IV.CESX.HHZ. 2023-02-17T06:16:43.14 0.3 undecidable manual S 229 19.1697 103 -0.24 74
IV.FDMO.HHZ. 2023-02-17T06:16:43.76 0.3 undecidable manual P 37 43.623 93 -0.14 73
IV.MOMA.HHZ. 2023-02-17T06:16:43.03 0.3 undecidable manual S 300 18.0708 105 -0.07 76
IV.CESI.HHZ. 2023-02-17T06:16:42.19 0.3 undecidable manual P 20 33.3444 95 -0.13 75
IV.NRCA.HHZ. 2023-02-17T06:16:41.86 0.1 undecidable manual P 67 31.1466 95 -0.12 100
IV.GAVE.EHZ. 2023-02-17T06:16:41.40 0.3 undecidable manual S 108 11.2776 125 -0.04 78
IV.LNSS.HHZ. 2023-02-17T06:16:41.50 0.3 undecidable manual P 120 26.2515 97 0.27 73
IV.CESX.HHZ. 2023-02-17T06:16:40.65 0.3 undecidable manual P 229 19.1697 103 0.49 71
IV.GAVE.EHZ. 2023-02-17T06:16:39.06 0.3 undecidable manual P 108 11.2776 125 0.03 79
IV.MOMA.HHZ. 2023-02-17T06:16:39.95 0.3 undecidable manual P 300 18.0708 105 -0.05 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:0.9 0.00007384999999999999 0.58 AML other m 2023-02-17T06:16:41.77
IV.GAVE.EHN. ML:0.8 0.00007215 0.6 AML other m 2023-02-17T06:16:42.22
IV.MOMA.HHN. ML:1.1 0.0000936 0.54 AML other m 2023-02-17T06:16:43.33
IV.MOMA.HHE. ML:1.3 0.000135 0.18 AML other m 2023-02-17T06:16:43.45
IV.LNSS.HHN. ML:0.9 0.0000471 0.3 AML other m 2023-02-17T06:16:45.49
IV.CESX.HHE. ML:0.8 0.00004495 0.36 AML other m 2023-02-17T06:16:45.33
IV.CESX.HHN. ML:0.8 0.00005085 0.4 AML other m 2023-02-17T06:16:45.79
IV.LNSS.HHE. ML:1.0 0.0000538 0.86 AML other m 2023-02-17T06:16:45.47
IV.NRCA.HHE. ML:1.0 0.000039699999999999996 0.12 AML other m 2023-02-17T06:16:46.56
IV.NRCA.HHN. ML:0.8 0.0000302 1.04 AML other m 2023-02-17T06:16:47.03
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