Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 06-06-2023 and time 23:17:48 (UTC) in region 1 km S Premilcuore (FC)

A magnitude ML 0.5 earthquake occured in region: 1 km S Premilcuore (FC), on

  • 06-06-2023 23:17:48 (UTC)
  • 07-06-2023 01:17:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9710, 11.7760 at 9 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
Premilcuore FC 1 799 799
Portico e San Benedetto FC 6 756 1555
Santa Sofia FC 11 4136 5691
Galeata FC 11 2516 8207
Rocca San Casciano FC 12 1910 10117
Tredozio FC 12 1212 11329
San Godenzo FI 13 1167 12496
Civitella di Romagna FC 14 3786 16282
Marradi FI 18 3139 19421
Dovadola FC 19 1653 21074

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Forlì (117913 inhabitants)
36 Km S of Faenza (58541 inhabitants)
42 Km W of Cesena (96758 inhabitants)
43 Km S of Imola (69797 inhabitants)
47 Km E of Firenze (382808 inhabitants)
53 Km E of Scandicci (50609 inhabitants)
55 Km E of Prato (191150 inhabitants)
57 Km N of Arezzo (99543 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
64 Km W of Rimini (147750 inhabitants)
68 Km SE of Bologna (386663 inhabitants)
69 Km E of Pistoia (90315 inhabitants)
81 Km NE of Siena (53903 inhabitants)
91 Km W of Pesaro (94582 inhabitants)
97 Km S of Ferrara (133155 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 0.5 2023-06-06
23:17:48		 43.971 11.7757 9 2023-06-06
23:24:27		 Sala Sismica INGV-Roma 118162871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-06-06 23:17:48 ± 0.08
Latitude 43.9710 ± 0.0045
Longitude 11.7757 ± 0.0050
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 118162871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 539
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 209
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 190
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37412
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 118162871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-06-06 23:24:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-06-06T23:18:19.04 3.0 undecidable manual S -0.87 0
IV.MPAG.EHZ. 2023-06-06T23:18:05.16 3.0 undecidable manual P 1 0
IV.CRE.HHZ. 2023-06-06T23:18:02.56 0.1 undecidable manual S 160 41.5251 50 0.12 92
IV.VISG.HHZ. 2023-06-06T23:18:01.01 0.3 undecidable manual S 312 36.4413 50 -0.07 71
IV.SEI.HHZ. 2023-06-06T23:18:00.60 0.1 undecidable manual S 286 34.5432 50 0.02 95
IV.RUFI.EHZ. 2023-06-06T23:17:57.80 0.1 undecidable manual S 235 25.8519 108 -0.01 97
IV.CRE.HHZ. 2023-06-06T23:17:56.23 0.6 negative manual P 160 41.5251 50 -0.26 45
IV.VISG.HHZ. 2023-06-06T23:17:55.96 0.3 undecidable manual P 312 36.4413 50 0.26 68
IV.SEI.HHZ. 2023-06-06T23:17:55.07 0.6 undecidable manual P 286 34.5432 50 -0.34 45
IV.VMGN.HHZ. 2023-06-06T23:17:55.80 0.1 undecidable manual S 265 19.4694 114 0.07 97
IV.RUFI.EHZ. 2023-06-06T23:17:53.67 0.6 positive manual P 235 25.8519 108 -0.13 47
IV.SFI.EHZ. 2023-06-06T23:17:52.73 0.1 undecidable manual S 142 9.2796 133 0 100
IV.VMGN.HHZ. 2023-06-06T23:17:52.65 1.0 undecidable manual P 265 19.4694 114 0.04 24
IV.SFI.EHZ. 2023-06-06T23:17:50.88 0.6 positive manual P 142 9.2796 133 0.01 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:0.4 0.000037148362 0.1152 AML other m 2023-06-06T23:17:52.78
IV.SFI.EHN. ML:0.6 0.00006228388 0.1536 AML other m 2023-06-06T23:17:52.83
IV.SFI.HNN. ML:0.7 0.00006906564 0.1408 AML other m 2023-06-06T23:17:52.83
IV.VMGN.HHE. ML:0.3 0.000016486485 0.0768 AML other m 2023-06-06T23:17:57.27
IV.VMGN.HHN. ML:0.1 0.000012012646 0.2304 AML other m 2023-06-06T23:17:57.45
IV.RUFI.EHE. ML:-0.1 0.000007312550000000001 0.4352 AML other m 2023-06-06T23:17:57.45
IV.RUFI.EHN. ML:0.5 0.000019155093499999998 0.2816 AML other m 2023-06-06T23:17:58.25
IV.SEI.HHN. ML:1.0 0.000043030665 0.2944 AML other m 2023-06-06T23:18:00.73
IV.CRE.HHE. ML:0.5 0.0000100439155 0.2816 AML other m 2023-06-06T23:18:03.62
IV.CRE.HHN. ML:0.9 0.000027034395000000003 0.256 AML other m 2023-06-06T23:18:02.98
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