Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 09-06-2023 and time 11:30:34 (Italy) in region 3 km E Firenzuola (FI)

A magnitude ML 0.9 earthquake occured in region: 3 km E Firenzuola (FI), on

  • 09-06-2023 09:30:34 (UTC)
  • 09-06-2023 11:30:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1100, 11.4170 at 8 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
Firenzuola FI 3 4726 4726
Palazzuolo sul Senio FI 11 1154 5880
Castel del Rio BO 14 1246 7126
Monghidoro BO 15 3749 10875
Marradi FI 16 3139 14014
Borgo San Lorenzo FI 17 18211 32225
Scarperia e San Piero FI 18 12217 44442
Barberino di Mugello FI 19 10836 55278
San Benedetto Val di Sambro BO 19 4315 59593
Loiano BO 20 4294 63887
Vicchio FI 20 8044 71931

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NE of Prato (191150 inhabitants)
36 Km SW of Imola (69797 inhabitants)
40 Km NE of Firenze (382808 inhabitants)
42 Km W of Faenza (58541 inhabitants)
43 Km S of Bologna (386663 inhabitants)
43 Km NE of Scandicci (50609 inhabitants)
44 Km E of Pistoia (90315 inhabitants)
51 Km W of Forlì (117913 inhabitants)
66 Km W of Cesena (96758 inhabitants)
71 Km W of Ravenna (159116 inhabitants)
71 Km SE of Modena (184973 inhabitants)
79 Km E of Lucca (89046 inhabitants)
81 Km NW of Arezzo (99543 inhabitants)
83 Km S of Ferrara (133155 inhabitants)
86 Km SE of Carpi (70699 inhabitants)
88 Km N of Siena (53903 inhabitants)
91 Km SE of Reggio nell'Emilia (171345 inhabitants)
92 Km W of Rimini (147750 inhabitants)
92 Km E of Pisa (89158 inhabitants)
97 Km E of Viareggio (62467 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 0.9 2023-06-09
09:30:34		 44.1095 11.4173 8 2023-06-09
09:41:40		 Sala Sismica INGV-Roma 118237871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-06-09 09:30:34 ± 0.3
Latitude 44.1095 ± 0.0063
Longitude 11.4173 ± 0.0113
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 118237871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 869
Semi-minor axis of confidence ellipse (meter) 486
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.26080
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 11
Type of magnitude ML
Reference to an origin 118237871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-06-09 09:41:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RINC.EHZ. 2023-06-09T09:30:44.88 0.3 undecidable manual S 148 28.9488 105 0.39 67
IV.BOSL.HHZ. 2023-06-09T09:30:42.02 0.3 undecidable manual S 190 20.0688 111 0.47 67
IV.MOCL.EHZ. 2023-06-09T09:30:42.39 0.3 undecidable manual S 238 22.1556 109 0.18 71
IV.RINC.EHZ. 2023-06-09T09:30:39.71 0.3 undecidable manual P 148 28.9488 105 -0.39 67
IV.VISG.HHZ. 2023-06-09T09:30:38.44 0.3 undecidable manual S 9 8.88 130 0.29 71
IV.BOSL.HHZ. 2023-06-09T09:30:38.51 0.1 undecidable manual P 190 20.0688 111 0.12 96
IV.MOCL.EHZ. 2023-06-09T09:30:38.84 0.1 undecidable manual P 238 22.1556 109 0.06 97
IV.SEI.HHZ. 2023-06-09T09:30:37.50 0.3 undecidable manual S 217 7.6812 134 -0.34 70
IV.VMGN.HHZ. 2023-06-09T09:30:37.98 0.1 undecidable manual P 152 19.4694 111 -0.3 92
IV.VISG.HHZ. 2023-06-09T09:30:36.43 0.1 undecidable manual P 9 8.88 130 0 100
IV.SEI.HHZ. 2023-06-09T09:30:35.92 0.1 undecidable manual P 217 7.6812 134 -0.33 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BOSL.HHE. ML:0.3 0.000017250000000000003 0.26 AML other m 2023-06-09T09:30:42.04
IV.BOSL.HHN. ML:0.3 0.00001645 0.48 AML other m 2023-06-09T09:30:42.61
IV.VMGN.HHE. ML:0.3 0.0000144 0.82 AML other m 2023-06-09T09:30:42.83
IV.VMGN.HHN. ML:0.5 0.0000237 0.22 AML other m 2023-06-09T09:30:42.83
IV.MOCL.EHE. ML:1.1 0.000079 0.22 AML other m 2023-06-09T09:30:43.13
IV.MOCL.EHN. ML:1.0 0.00006789999999999998 0.9 AML other m 2023-06-09T09:30:43.46
IV.SEI.HHE. ML:1.3 0.00033725669999999994 0.1792 AML other m 2023-06-09T09:30:38.24
IV.SEI.HHN. ML:1.4 0.00043226755 0.4032 AML other m 2023-06-09T09:30:38.31
IV.VISG.HHE. ML:1.0 0.00014566485 0.3392 AML other m 2023-06-09T09:30:38.75
IV.VISG.HHN. ML:0.8 0.000102863005 0.2816 AML other m 2023-06-09T09:30:40.10
IV.RINC.EHE. ML:1.1 0.00006394457350000001 0.256 AML other m 2023-06-09T09:30:45.14
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