Earthquake with magnitude of ML 1.5 on date 19-08-2009 and time 15:19:32 (UTC) in region 3 km SW Chiusdino (SI)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Chiusdino (SI), on

  • 19-08-2009 15:19:32 (UTC)
  • 19-08-2009 17:19:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1330, 11.0640 at 8 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 3 1903 1903
Montieri GR 4 1204 3107
Monticiano SI 10 1571 4678
Radicondoli SI 15 914 5592
Castelnuovo di Val di Cecina PI 15 2231 7823
Roccastrada GR 16 9199 17022
Massa Marittima GR 17 8375 25397
Monterotondo Marittimo GR 17 1371 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
70 Km S of Scandicci (50609 inhabitants)
73 Km S of Firenze (382808 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
77 Km SE of Livorno (159219 inhabitants)
83 Km S of Prato (191150 inhabitants)
84 Km SE of Pisa (89158 inhabitants)
90 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 1.5
2009-08-19
15:19:32
43.133 11.064 8 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 951229
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-08-19 15:19:32 ± 0.21
Latitude 43.1330 ± 0.0315
Longitude 11.0640 ± 0.0308
Depth (km) 8 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 951229

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4015
Semi-minor axis of confidence ellipse (meter) 1531
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 4301.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.68528
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.5
Num. used stations
Type of magnitude ML
Reference to an origin 951229
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:09:15

Md:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 951229
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:09:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.SHZ. 2009-08-19T15:20:05.61 10.0 undecidable manual Pg 0 0 0
IV.ARCI.HHZ. 2009-08-19T15:19:47.81 0.3 undecidable manual Sg 133 45.7209 -0.398 66
IV.CASP.HHE. 2009-08-19T15:19:46.75 0.3 undecidable manual Sg 203 41.3253 -0.286 68
IV.CAFI.HHZ. 2009-08-19T15:19:46.22 0.1 undecidable manual Pg 73 76.0683 -0.165 88
IV.ARCI.HHZ. 2009-08-19T15:19:42.11 0.1 undecidable manual Pg 133 45.7209 0.407 88
IV.CASP.HHE. 2009-08-19T15:19:41.38 0.1 undecidable manual Pg 203 41.3253 0.352 90
IV.GRFL.SHZ. 2009-08-19T15:19:36.24 0.3 undecidable manual Sg 282 7.3815 -0.288 73
IV.GRFL.SHZ. 2009-08-19T15:19:35.09 0.1 undecidable manual Pg 282 7.3815 0.132 100
IV.MMME.HHZ. 2009-08-19T15:19:34.68 10.0 undecidable manual Pg 0 0 0
NI.ACOM.HHN. 2009-08-19T15:19:28.68 10.0 undecidable manual Pg 0 0 0
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