Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.4 on date 23-05-2023 and time 06:15:02 (UTC) in region 4 km SW Urbania (PU)

A magnitude ML 0.4 (quarry blast) earthquake occured in region: 4 km SW Urbania (PU), on

  • 23-05-2023 06:15:02 (UTC)
  • 23-05-2023 08:15:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6400, 12.5030 at 7 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Event type: quarry blast.

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
Urbania PU 4 7099 7099
Piobbico PU 6 2029 9128
Peglio PU 6 696 9824
Sant'Angelo in Vado PU 8 4133 13957
Apecchio PU 11 1882 15839
Lunano PU 11 1527 17366
Piandimeleto PU 12 2167 19533
Fermignano PU 12 8596 28129
Mercatello sul Metauro PU 13 1378 29507
Belforte all'Isauro PU 13 769 30276
Acqualagna PU 14 4393 34669
Urbino PU 14 15019 49688
Cagli PU 16 8731 58419
Sassocorvaro PU 16 3504 61923
Borgo Pace PU 17 606 62529
Frontino PU 17 293 62822
Sestino AR 18 1355 64177
Macerata Feltria PU 19 1990 66167

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km SW of Pesaro (94582 inhabitants)
47 Km S of Rimini (147750 inhabitants)
47 Km W of Fano (60888 inhabitants)
54 Km E of Arezzo (99543 inhabitants)
59 Km SE of Cesena (96758 inhabitants)
60 Km N of Perugia (166134 inhabitants)
75 Km SE of Forlì (117913 inhabitants)
78 Km N of Foligno (57155 inhabitants)
82 Km W of Ancona (100861 inhabitants)
87 Km SE of Faenza (58541 inhabitants)
90 Km S of Ravenna (159116 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 2023-05-23
06:15:02		 43.6403 12.5033 7 2023-05-23
06:48:24		 Sala Sismica INGV-Roma 117619491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-23 06:15:02 ± 0.27
Latitude 43.6403 ± 0.0054
Longitude 12.5033 ± 0.0137
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 117619491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1102
Semi-minor axis of confidence ellipse (meter) 549
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 1100.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.26710
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 117619491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-23 06:48:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVO.HHZ. 2023-05-23T06:15:08.77 0.3 undecidable manual P 195 29.6481 104 0.16 93
IV.PIEI.HHZ. 2023-05-23T06:15:07.26 0.3 undecidable manual S 168 11.877 121 -0.06 98
IV.BADI.EHZ. 2023-05-23T06:15:07.64 0.6 undecidable manual P 235 25.3524 106 -0.14 63
IV.CPGN.EHZ. 2023-05-23T06:15:07.61 0.3 undecidable manual P 321 23.0547 107 0.27 92
IV.PE3.EHZ. 2023-05-23T06:15:06.12 0.6 undecidable manual S 355 6.1938 140 0.31 63
IV.ATBU.EHZ. 2023-05-23T06:15:06.64 0.6 undecidable manual P 169 18.6702 111 0.15 63
IV.PARC.HHZ. 2023-05-23T06:15:06.67 0.3 undecidable manual P 273 21.2676 109 -0.32 91
IV.NARO.HHZ. 2023-05-23T06:15:06.00 0.3 undecidable manual S 118 6.993 136 0 100
IV.ATPC.HHZ. 2023-05-23T06:15:06.62 0.6 undecidable manual P 192 18.0708 112 0.22 63
IV.APEC.HNZ. 2023-05-23T06:15:05.48 0.6 undecidable manual P 216 11.2776 123 0.3 62
IV.PIEI.HHZ. 2023-05-23T06:15:05.06 0.3 undecidable manual P 168 11.877 121 -0.22 95
IV.PE3.EHZ. 2023-05-23T06:15:04.02 0.3 undecidable manual P 355 6.1938 140 -0.38 93
IV.NARO.HHZ. 2023-05-23T06:15:04.51 0.3 undecidable manual P 118 6.993 136 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HHE. ML:0.4 0.00003265 1.06 AML other m 2023-05-23T06:15:08.86
IV.PIEI.HHN. ML:0.2 0.000019699999999999998 1.02 AML other m 2023-05-23T06:15:12.76
IV.PARC.HHE. ML:0.3 0.0000162 0.88 AML other m 2023-05-23T06:15:13.80
IV.PARC.HHN. ML:0.6 0.00003165 1.08 AML other m 2023-05-23T06:15:14.10
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