Earthquake with magnitude of ML 0.4 on date 02-01-2011 and time 02:22:08 (Italy) in region 3 km W Monterotondo Marittimo (GR)

A magnitude ML 0.4 earthquake occured in region: 3 km W Monterotondo Marittimo (GR), on

  • 02-01-2011 01:22:08 (UTC)
  • 02-01-2011 02:22:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1520, 10.8260 at 0 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
Monterotondo Marittimo GR 3 1371 1371
Castelnuovo di Val di Cecina PI 9 2231 3602
Monteverdi Marittimo PI 9 758 4360
Massa Marittima GR 12 8375 12735
Suvereto LI 14 3072 15807
Sassetta LI 15 514 16321
Montieri GR 16 1204 17525
Pomarance PI 17 5897 23422
Castagneto Carducci LI 18 9010 32432
Campiglia Marittima LI 20 13218 45650

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km W of Siena (53903 inhabitants)
49 Km NW of Grosseto (82087 inhabitants)
61 Km SE of Livorno (159219 inhabitants)
72 Km SE of Pisa (89158 inhabitants)
73 Km SW of Scandicci (50609 inhabitants)
77 Km SW of Firenze (382808 inhabitants)
81 Km SE of Lucca (89046 inhabitants)
84 Km S of Prato (191150 inhabitants)
87 Km S of Pistoia (90315 inhabitants)
92 Km SE of Viareggio (62467 inhabitants)
93 Km W of Arezzo (99543 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 1.7
ML 0.4
2011-01-02
01:22:08
43.152 10.826 0 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1156479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-01-02 01:22:08 ± 0.18
Latitude 43.1520 ± 0.0144
Longitude 10.8260 ± 0.0136
Depth (km) 0 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1156479

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2105
Semi-minor axis of confidence ellipse (meter) 526
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 1941.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 0.14569
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:0.4

Field Value
Value 0.4
Uncertainty 0.0
Num. used stations
Type of magnitude ML
Reference to an origin 1156479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 22:30:30

Md:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1156479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 22:30:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SASS.HHZ. 2011-01-02T01:22:13.77 0.1 undecidable manual Sg 317 16.1727 -0.126 97
IV.GRFL.SHZ. 2011-01-02T01:22:12.37 0.1 undecidable manual Sg 92 12.1767 -0.144 97
IV.GRFL.SHZ. 2011-01-02T01:22:11.07 0.1 undecidable manual Pg 92 12.1767 0.338 93
IV.SASS.HHZ. 2011-01-02T01:22:11.59 0.1 undecidable manual Pg 317 16.1727 0.06 98
IV.TRIF.HHZ. 2011-01-02T01:22:10.75 0.1 undecidable manual Sg 123 7.4814 -0.139 98
IV.TRIF.HHZ. 2011-01-02T01:22:09.82 0.1 undecidable manual Pg 123 7.4814 0.026 100
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