Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 11-05-2023 and time 15:07:21 (UTC) in region 6 km W Monteleone di Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km W Monteleone di Spoleto (PG), on

  • 11-05-2023 15:07:21 (UTC)
  • 11-05-2023 17:07:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6680, 12.8870 at 12 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
Monteleone di Spoleto PG 6 599 599
Poggiodomo PG 6 117 716
Scheggino PG 7 461 1177
Sant'Anatolia di Narco PG 8 564 1741
Ferentillo TR 9 1913 3654
Polino TR 10 233 3887
Vallo di Nera PG 12 364 4251
Cascia PG 12 3217 7468
Montefranco TR 13 1276 8744
Arrone TR 13 2763 11507
Leonessa RI 13 2435 13942
Spoleto PG 14 38218 52160
Morro Reatino RI 16 373 52533
Rivodutri RI 17 1253 53786
Cerreto di Spoleto PG 17 1075 54861
Labro RI 17 374 55235
Poggio Bustone RI 18 2055 57290
Campello sul Clitunno PG 19 2442 59732

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Terni (111501 inhabitants)
35 Km SE of Foligno (57155 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
64 Km SE of Perugia (166134 inhabitants)
67 Km W of Teramo (54892 inhabitants)
70 Km E of Viterbo (67173 inhabitants)
75 Km N of Guidonia Montecelio (88673 inhabitants)
79 Km N of Tivoli (56533 inhabitants)
92 Km NE 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 1.1 2023-05-11
15:07:21		 42.6678 12.8873 12 2023-05-11
15:17:46		 Sala Sismica INGV-Roma 117253421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-11 15:07:21 ± 0.18
Latitude 42.6678 ± 0.0099
Longitude 12.8873 ± 0.0122
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117253421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 940
Semi-minor axis of confidence ellipse (meter) 644
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 314
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 117253421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-11 15:17:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHE. 2023-05-11T15:07:34.87 0.3 undecidable manual S 2 37.4292 93 0.69 62
IV.NRCA.HHZ. 2023-05-11T15:07:31.14 0.3 undecidable manual S 45 26.0517 96 -0.02 73
IV.MOMA.HHZ. 2023-05-11T15:07:31.91 0.6 undecidable manual S 300 29.9478 94 -0.28 46
IV.TERO.HHZ. 2023-05-11T15:07:30.55 3.0 undecidable manual P 0
IV.ASSB.HHZ. 2023-05-11T15:07:29.51 0.3 undecidable manual P 336 45.5211 92 -0.65 60
IV.CESI.HHE. 2023-05-11T15:07:29.09 0.3 undecidable manual P 2 37.4292 93 0.17 71
IV.LNSS.HHZ. 2023-05-11T15:07:28.26 0.3 undecidable manual S 120 14.3745 112 0.14 73
IV.ARRO.EHZ. 2023-05-11T15:07:28.06 0.3 undecidable manual S 225 13.9749 113 0.05 74
IV.SMA1.EHZ. 2023-05-11T15:07:27.90 0.1 undecidable manual P 96 36.741 93 -0.92 73
IV.NRCA.HHZ. 2023-05-11T15:07:27.22 0.1 undecidable manual P 45 26.0517 96 0.05 99
IV.MOMA.HHZ. 2023-05-11T15:07:27.85 0.3 undecidable manual P 300 29.9478 94 0.09 73
IV.LNSS.HHZ. 2023-05-11T15:07:25.76 0.1 undecidable manual P 120 14.3745 112 0.34 94
IV.ARRO.EHZ. 2023-05-11T15:07:25.63 0.1 positive manual P 225 13.9749 113 0.28 95
IV.GAVE.EHZ. 2023-05-11T15:07:25.74 0.1 undecidable manual S 12 2.7972 164 -0.28 98
IV.GAVE.EHZ. 2023-05-11T15:07:24.32 0.1 undecidable manual P 12 2.7972 164 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.2 0.00022666920000000002 0.1792 AML other m 2023-05-11T15:07:26.05
IV.GAVE.EHN. ML:1.5 0.0004345 1.58 AML other m 2023-05-11T15:07:26.07
IV.LNSS.HHE. ML:1.2 0.000147 1 AML other m 2023-05-11T15:07:28.52
IV.ARRO.EHN. ML:1.1 0.00011499999999999999 0.62 AML other m 2023-05-11T15:07:28.46
IV.ARRO.EHE. ML:1.0 0.0000971 1.3 AML other m 2023-05-11T15:07:28.32
IV.LNSS.HHN. ML:1.0 0.00010225527 0.3968 AML other m 2023-05-11T15:07:28.68
IV.NRCA.HHE. ML:0.9 0.000044730514999999996 0.128 AML other m 2023-05-11T15:07:32.19
IV.NRCA.HHN. ML:0.7 0.00003205741 0.1152 AML other m 2023-05-11T15:07:31.78
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