Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 30-11-2011 and time 05:10:45 (Italy) in region 5 km N Montieri (GR)

A magnitude ML 2.1 earthquake occured in region: 5 km N Montieri (GR), on

  • 30-11-2011 04:10:45 (UTC)
  • 30-11-2011 05:10:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1790, 11.0240 at 7 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.

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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
Montieri GR 5 1204 1204
Chiusdino SI 6 1903 3107
Radicondoli SI 9 914 4021
Castelnuovo di Val di Cecina PI 10 2231 6252
Monticiano SI 13 1571 7823
Monterotondo Marittimo GR 14 1371 9194
Massa Marittima GR 18 8375 17569
Casole d'Elsa SI 18 3897 21466
Pomarance PI 18 5897 27363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Siena (53903 inhabitants)
47 Km N of Grosseto (82087 inhabitants)
66 Km S of Scandicci (50609 inhabitants)
68 Km S of Firenze (382808 inhabitants)
71 Km SE of Livorno (159219 inhabitants)
77 Km W of Arezzo (99543 inhabitants)
78 Km SE of Pisa (89158 inhabitants)
78 Km S of Prato (191150 inhabitants)
84 Km S of Pistoia (90315 inhabitants)
85 Km SE of Lucca (89046 inhabitants)
99 Km SE 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
Bulletin
Rev1000 		Md 2.3
ML 2.1 		2011-11-30
04:10:45		 43.179 11.024 7 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1314949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-11-30 04:10:45 ± 0.11
Latitude 43.1790 ± 0.0063
Longitude 11.0240 ± 0.0086
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1314949

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 732
Semi-minor axis of confidence ellipse (meter) 532
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 165
Circular confidence region, given by single value of horizontal uncertainty (meter) 989.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.57
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.15383
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1314949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:07:19

Md:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 1314949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:07:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVO.HHE. 2011-11-30T04:11:22.58 10.0 undecidable manual Sg 0 0 0
IV.FSSB.HHE. 2011-11-30T04:11:15.90 10.0 undecidable manual Pg 0 0 0
IV.ASQU.HHZ. 2011-11-30T04:11:14.02 0.6 undecidable manual Sg 42 92.1411 0.314 41
IV.MAON.HHE. 2011-11-30T04:11:11.61 0.3 undecidable manual Sg 174 83.7495 0.146 65
IV.SSFR.HHE. 2011-11-30T04:11:11.76 10.0 undecidable manual Pg 0 0 0
IV.ATCC.EHZ. 2011-11-30T04:11:10.01 10.0 undecidable manual Pg 0 0 0
IV.PIEI.HHE. 2011-11-30T04:11:08.10 0.6 undecidable manual Pg 71 128.0718 0.653 35
IV.CPGN.EHZ. 2011-11-30T04:11:08.50 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHZ. 2011-11-30T04:11:08.34 10.0 undecidable manual Pg 0 0 0
MN.VLC.HHZ. 2011-11-30T04:11:06.42 0.6 undecidable manual Pg 335 120.1908 0.193 40
IV.ATTE.HHN. 2011-11-30T04:11:06.84 10.0 undecidable manual Pg 0 0 0
IV.ATPC.HHZ. 2011-11-30T04:11:06.58 0.3 undecidable manual Pg 73 120.3906 0.328 58
IV.ATVO.HHE. 2011-11-30T04:11:05.96 10.0 undecidable manual Pg 0 0 0
IV.PARC.HHZ. 2011-11-30T04:11:05.13 0.1 undecidable manual Pg 62 110.9001 0.342 79
IV.FNVD.HHZ. 2011-11-30T04:11:05.03 0.6 undecidable manual Pg 4 110.0121 0.379 39
IV.BADI.EHZ. 2011-11-30T04:11:04.50 0.6 undecidable manual Pg 69 105.0171 0.609 37
IV.SFI.EHZ. 2011-11-30T04:11:04.06 0.1 undecidable manual Pg 39 104.2179 0.298 81
IV.SEI.SHZ. 2011-11-30T04:11:03.70 0.3 undecidable manual Pg 15 100.7214 0.472 59
IV.BDI.HHN. 2011-11-30T04:11:03.74 0.3 undecidable manual Pg 341 103.8183 0.036 64
IV.VMG.SHZ. 2011-11-30T04:11:02.97 0.3 undecidable manual Pg 26 96.3258 0.419 60
IV.ATMC.EHZ. 2011-11-30T04:11:02.98 0.3 undecidable manual Pg 72 98.9232 0.037 65
IV.ASQU.HHZ. 2011-11-30T04:11:02.16 0.1 undecidable manual Pg 42 92.1411 0.26 83
IV.CRE.HHZ. 2011-11-30T04:11:01.51 0.3 undecidable manual Pg 57 89.244 0.049 66
IV.PTF.SHZ. 2011-11-30T04:11:01.03 0.1 undecidable manual Pg 2 86.7465 -0.042 88
IV.ARCI.HHZ. 2011-11-30T04:11:01.40 0.3 undecidable manual Sg 135 51.5151 -1.47 41
IV.MAON.HHE. 2011-11-30T04:11:01.09 0.1 undecidable manual Pg 174 83.7495 0.483 81
IV.SACS.HHZ. 2011-11-30T04:11:00.01 0.3 undecidable manual Pg 117 80.5638 -0.116 66
IV.MCIV.HHZ. 2011-11-30T04:10:58.15 0.1 undecidable manual Pg 130 69.0753 -0.202 88
IV.CSNT.HHN. 2011-11-30T04:10:58.00 0.3 undecidable manual Sg 33 39.0276 -1.539 40
IV.ARCI.HHZ. 2011-11-30T04:10:55.26 0.1 undecidable manual Pg 135 51.5151 -0.385 88
IV.SASS.HHZ. 2011-11-30T04:10:55.11 0.3 undecidable manual Sg 288 28.4493 -0.827 59
IV.CSNT.HHN. 2011-11-30T04:10:53.05 0.1 undecidable manual Pg 33 39.0276 -0.671 82
IV.SASS.HHZ. 2011-11-30T04:10:51.45 0.1 undecidable manual Pg 288 28.4493 -0.191 95
IV.FROS.HHE. 2011-11-30T04:10:50.14 0.1 undecidable manual Sg 72 11.1777 -0.236 97
IV.TRIF.HHZ. 2011-11-30T04:10:50.74 0.1 undecidable manual Sg 234 12.1767 0.086 100
IV.TRIF.HHZ. 2011-11-30T04:10:48.89 0.1 undecidable manual Pg 234 12.1767 0.298 96
IV.FROS.HHE. 2011-11-30T04:10:48.53 0.1 undecidable manual Pg 72 11.1777 0.1 100
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
Waveforms Seismic signals in miniseed + resp format Download