Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 11-05-2023 and time 11:17:26 (UTC) in region 6 km S Apecchio (PU)

A magnitude ML 0.4 earthquake occured in region: 6 km S Apecchio (PU), on

  • 11-05-2023 11:17:26 (UTC)
  • 11-05-2023 13:17:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5040, 12.4140 at 6 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
Apecchio PU 6 1882 1882
Pietralunga PG 7 2111 3993
Piobbico PU 12 2029 6022
Città di Castello PG 15 39913 45935
Montone PG 17 1680 47615
Mercatello sul Metauro PU 17 1378 48993
Cantiano PU 18 2245 51238
Sant'Angelo in Vado PU 18 4133 55371
Cagli PU 20 8731 64102
Borgo Pace PU 20 606 64708
San Giustino PG 20 11297 76005

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Arezzo (99543 inhabitants)
44 Km N of Perugia (166134 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
62 Km SW of Fano (60888 inhabitants)
63 Km S of Rimini (147750 inhabitants)
65 Km NW of Foligno (57155 inhabitants)
72 Km S of Cesena (96758 inhabitants)
85 Km SE of Forlì (117913 inhabitants)
90 Km E of Siena (53903 inhabitants)
90 Km W of Ancona (100861 inhabitants)
97 Km SE of Faenza (58541 inhabitants)
98 Km E of Firenze (382808 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 0.4 2023-05-11
11:17:26		 43.5042 12.4143 6 2023-05-11
11:32:36		 Sala Sismica INGV-Roma 117245121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-11 11:17:26 ± 0.1
Latitude 43.5042 ± 0.0036
Longitude 12.4143 ± 0.0062
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117245121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 407
Semi-minor axis of confidence ellipse (meter) 387
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 209
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.16098
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 117245121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-11 11:32:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2023-05-11T11:17:33.36 0.6 undecidable manual S 48 17.871 109 -0.16 48
IV.TB01.DHZ.01 2023-05-11T11:17:32.16 0.6 undecidable manual S 173 13.6752 114 -0.02 49
IV.ATVO.HHZ. 2023-05-11T11:17:32.32 0.6 undecidable manual S 183 13.5753 115 0.19 48
IV.TSM3.DHE.01 2023-05-11T11:17:32.51 0.6 undecidable manual S 199 14.2746 114 0.16 48
IV.ATBU.EHN. 2023-05-11T11:17:31.68 0.6 undecidable manual S 106 11.2776 119 0.27 47
IV.PIEI.HHZ. 2023-05-11T11:17:31.29 0.6 undecidable manual S 70 10.2786 121 0.15 48
IV.TSM2.DHE.01 2023-05-11T11:17:31.76 0.6 undecidable manual S 153 13.3755 115 -0.33 46
IV.NARO.HHZ. 2023-05-11T11:17:30.59 0.6 negative manual P 48 17.871 109 -0.16 48
IV.TSM3.DHE.01 2023-05-11T11:17:30.11 0.1 undecidable manual P 199 14.2746 114 0.04 98
IV.TB03.DHZ. 2023-05-11T11:17:30.62 3.0 undecidable manual S 0
IV.TSM2.DHE.01 2023-05-11T11:17:29.85 0.1 undecidable manual P 153 13.3755 115 -0.07 98
IV.TB01.DHZ.01 2023-05-11T11:17:29.92 0.1 undecidable manual P 173 13.6752 114 -0.05 98
IV.ATBU.EHN. 2023-05-11T11:17:29.59 0.1 undecidable manual P 106 11.2776 119 0.06 98
IV.PIEI.HHZ. 2023-05-11T11:17:29.49 0.1 positive manual P 70 10.2786 121 0.11 97
IV.ATVO.HHZ. 2023-05-11T11:17:29.91 0.6 positive manual P 183 13.5753 115 -0.04 49
IV.ATPC.HHN. 2023-05-11T11:17:29.44 0.6 undecidable manual S 127 4.2957 145 -0.14 49
IV.ATPI.EHZ. 2023-05-11T11:17:29.92 0.6 undecidable manual S 189 5.994 136 -0.04 50
IV.ATPC.HHN. 2023-05-11T11:17:28.44 0.1 undecidable manual P 127 4.2957 145 -0.03 100
IV.ATPI.EHZ. 2023-05-11T11:17:28.72 0.6 undecidable manual P 189 5.994 136 0.03 50
IV.TB03.DHZ.01 2023-05-11T11:17:28.56 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HHE. ML:0.4 0.000034500000000000005 0.8 AML other m 2023-05-11T11:17:32.36
IV.PIEI.HHN. ML:0.4 0.000038 0.58 AML other m 2023-05-11T11:17:32.37
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