Earthquake with magnitude of ML 0.9 on date 24-12-2007 and time 14:32:27 (Italy) in region 3 km SW Palazzuolo sul Senio (FI)

A magnitude ML 0.9 earthquake occured in region: 3 km SW Palazzuolo sul Senio (FI), on

  • 24-12-2007 13:32:27 (UTC)
  • 24-12-2007 14:32:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.09, 11.53 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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 3 1154 1154
Marradi FI 7 3139 4293
Firenzuola FI 13 4726 9019
Castel del Rio BO 14 1246 10265
Casola Valsenio RA 17 2617 12882
Tredozio FC 17 1212 14094
Vicchio FI 18 8044 22138
Borgo San Lorenzo FI 19 18211 40349
San Godenzo FI 19 1167 41516
Fontanelice BO 19 1943 43459

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Imola (69797 inhabitants)
36 Km SW of Faenza (58541 inhabitants)
42 Km NE of Firenze (382808 inhabitants)
42 Km NE of Prato (191150 inhabitants)
43 Km W of Forlì (117913 inhabitants)
46 Km NE of Scandicci (50609 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
52 Km E of Pistoia (90315 inhabitants)
57 Km W of Cesena (96758 inhabitants)
65 Km SW of Ravenna (159116 inhabitants)
74 Km NW of Arezzo (99543 inhabitants)
79 Km SE of Modena (184973 inhabitants)
83 Km W of Rimini (147750 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
87 Km E of Lucca (89046 inhabitants)
87 Km N of Siena (53903 inhabitants)
93 Km SE of Carpi (70699 inhabitants)
99 Km SE of Reggio nell'Emilia (171345 inhabitants)
99 Km E of Pisa (89158 inhabitants)
Recent and historical Seismicity
Seismic hazard
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 1.8
ML 0.9
44.09 11.53 9 2014-10-21
Bollettino Sismico Italiano INGV 666839
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2007-12-24 13:32:27 ± 0.22
Latitude 44.09 ± 0.02
Longitude 11.53 ± 0.02
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 666839


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2186
Semi-minor axis of confidence ellipse (meter) 434
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 2280.4
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 234
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.12591
Epicentral distance of station farthest from the epicenter (degree) 0.29048
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes information


Field Value
Value 0.9
Uncertainty 0
Num. used stations
Type of magnitude ML
Reference to an origin 666839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 12:39:18


Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 666839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 12:39:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SFI.EHE. 2007-12-24T13:32:39.62 0.1 undecidable manual Sg 129 0.2905 0.094 94
IV.SFI.EHE. 2007-12-24T13:32:34.52 0.1 undecidable manual Pg 129 0.2905 -0.113 95
IV.SEI.SHZ. 2007-12-24T13:32:33.75 0.1 undecidable manual Sg 255 0.1295 -0.003 100
IV.VMG.SHZ. 2007-12-24T13:32:33.57 0.1 undecidable manual Sg 176 0.1259 -0.069 99
IV.VMG.SHZ. 2007-12-24T13:32:31.35 0.1 undecidable manual Pg 176 0.1259 0.119 98
IV.SEI.SHZ. 2007-12-24T13:32:31.30 0.1 undecidable manual Pg 255 0.1295 0.003 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.SHZ. Md:2 27 END duration s
IV.VMG.SHZ. Md:1.7 18.1 END duration s
IV.SFI.EHN. ML:0.9 4.0E-5 9.2 AML other m 2007-12-24T13:32:34.52
IV.SFI.EHE. Md:1.8 18.2 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download