Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 16-10-2023 and time 07:39:52 (UTC) in region 9 km SW Palazzuolo sul Senio (FI)

A magnitude ML 0.7 earthquake occured in region: 9 km SW Palazzuolo sul Senio (FI), on

  • 16-10-2023 07:39:52 (UTC)
  • 16-10-2023 09:39:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0620, 11.4660 at 11 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
Palazzuolo sul Senio FI 9 1154 1154
Firenzuola FI 9 4726 5880
Marradi FI 12 3139 9019
Borgo San Lorenzo FI 13 18211 27230
Vicchio FI 14 8044 35274
Scarperia e San Piero FI 16 12217 47491
Castel del Rio BO 17 1246 48737
Barberino di Mugello FI 19 10836 59573
San Godenzo FI 19 1167 60740
Dicomano FI 19 5515 66255

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NE of Prato (191150 inhabitants)
37 Km NE of Firenze (382808 inhabitants)
38 Km SW of Imola (69797 inhabitants)
41 Km NE of Scandicci (50609 inhabitants)
42 Km SW of Faenza (58541 inhabitants)
46 Km E of Pistoia (90315 inhabitants)
49 Km S of Bologna (386663 inhabitants)
49 Km W of Forlì (117913 inhabitants)
63 Km W of Cesena (96758 inhabitants)
71 Km SW of Ravenna (159116 inhabitants)
74 Km NW of Arezzo (99543 inhabitants)
78 Km SE of Modena (184973 inhabitants)
81 Km E of Lucca (89046 inhabitants)
83 Km N of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
88 Km W of Rimini (147750 inhabitants)
93 Km SE of Carpi (70699 inhabitants)
94 Km E of Pisa (89158 inhabitants)
97 Km SE of Reggio nell'Emilia (171345 inhabitants)
100 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 0.7 2023-10-16
07:39:52		 44.0622 11.4662 11 2023-10-16
07:48:02		 Sala Sismica INGV-Roma 122122571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-16 07:39:52 ± 0.32
Latitude 44.0622 ± 0.0054
Longitude 11.4662 ± 0.0088
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122122571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 693
Semi-minor axis of confidence ellipse (meter) 307
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) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.20235
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:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 122122571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-16 07:48:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RINC.EHE. 2023-10-16T07:40:01.35 0.6 undecidable manual S 150 22.4553 50 -0.07 51
IV.BOSL.HHZ. 2023-10-16T07:40:00.05 0.6 undecidable manual S 207 16.2726 123 0.47 47
IV.LMD.HHZ. 2023-10-16T07:40:00.30 0.6 undecidable manual S 85 19.2696 119 -0.18 50
IV.VMGN.HHZ. 2023-10-16T07:39:58.65 0.6 undecidable manual S 156 13.0758 129 -0.03 53
IV.RINC.EHE. 2023-10-16T07:39:58.00 0.1 undecidable manual P 150 22.4553 50 0.2 100
IV.VISG.HHZ. 2023-10-16T07:39:58.95 0.6 undecidable manual S 350 14.2746 126 -0.07 52
IV.LMD.HHZ. 2023-10-16T07:39:57.31 0.6 negative manual P 85 19.2696 119 0.06 51
IV.SEI.HHZ. 2023-10-16T07:39:57.51 0.6 undecidable manual S 264 8.5803 141 -0.07 52
IV.VMGN.HHZ. 2023-10-16T07:39:56.49 0.6 undecidable manual P 156 13.0758 129 0.28 50
IV.BOSL.HHZ. 2023-10-16T07:39:56.21 0.1 undecidable manual P 207 16.2726 123 -0.53 93
IV.VISG.HHZ. 2023-10-16T07:39:56.68 0.6 negative manual P 350 14.2746 126 0.27 50
IV.SEI.HHZ. 2023-10-16T07:39:55.72 1.0 undecidable manual P 264 8.5803 141 0.14 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.3 0.00028835454999999997 0.2176 AML other m 2023-10-16T07:39:57.69
IV.SEI.HHN. ML:1.4 0.0003287425 0.416 AML other m 2023-10-16T07:39:57.82
IV.VMGN.HHE. ML:0.6 0.0000402377 2.0992 AML other m 2023-10-16T07:39:58.43
IV.VMGN.HHN. ML:0.5 0.00003494665 1.9392 AML other m 2023-10-16T07:40:00.67
IV.VISG.HHE. ML:0.4 0.000025210375 0.1152 AML other m 2023-10-16T07:39:59.85
IV.VISG.HHN. ML:0.5 0.000032036874999999996 0.2176 AML other m 2023-10-16T07:40:00.04
IV.LMD.HHE. ML:0.9 0.000058470545 2.4192 AML other m 2023-10-16T07:40:03.10
IV.LMD.HHN. ML:0.8 0.00004267028 2.5984 AML other m 2023-10-16T07:39:56.38
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