Earthquake with magnitude of ML 1.3 on date 25-12-2006 and time 23:04:30 (Italy) in region 2 km S Chiusdino (SI)

A magnitude ML 1.3 earthquake occured in region: 2 km S Chiusdino (SI), on

  • 25-12-2006 22:04:30 (UTC)
  • 25-12-2006 23:04:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1420, 11.0870 at 6 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
Chiusdino SI 2 1903 1903
Montieri GR 6 1204 3107
Monticiano SI 8 1571 4678
Radicondoli SI 14 914 5592
Roccastrada GR 16 9199 14791
Castelnuovo di Val di Cecina PI 16 2231 17022
Monterotondo Marittimo GR 19 1371 18393
Massa Marittima GR 19 8375 26768
Sovicille SI 19 10116 36884

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
69 Km S of Scandicci (50609 inhabitants)
71 Km S of Firenze (382808 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
78 Km SE of Livorno (159219 inhabitants)
82 Km S of Prato (191150 inhabitants)
85 Km SE of Pisa (89158 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
91 Km SE of Lucca (89046 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
Bulletin
Rev1000
Md 1.8
ML 1.3
2006-12-25
22:04:30
43.142 11.087 6 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 607049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2006-12-25 22:04:30 ± 0.25
Latitude 43.1420 ± 0.0126
Longitude 11.0870 ± 0.0148
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 607049

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1727
Semi-minor axis of confidence ellipse (meter) 684
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 1843.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
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) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 607049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:35:18

Md:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 607049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:35:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARCI.HHN. 2006-12-25T22:04:45.13 0.1 undecidable manual Sg 136 45.1215 -0.643 42
IV.CSNT.BHZ. 2006-12-25T22:04:43.74 0.1 undecidable manual Sg 24 40.2264 -0.388 46
IV.ARCI.HHN. 2006-12-25T22:04:39.43 0.1 positive manual Pg 136 45.1215 0.298 92
IV.CSNT.BHZ. 2006-12-25T22:04:38.39 0.1 positive manual Pg 24 40.2264 0.209 95
IV.GRFL.SHZ. 2006-12-25T22:04:33.25 0.1 undecidable manual Sg 273 9.0798 -0.481 47
IV.GRFL.SHZ. 2006-12-25T22:04:32.39 0.1 negative manual Pg 273 9.0798 0.213 100
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