Earthquake with magnitude of Md 2.3 on date 27-10-2001 and time 04:25:38 (UTC) in region 1 km W Montescudaio (PI)

A magnitude Md 2.3 earthquake occured in region: 1 km W Montescudaio (PI), on

  • 27-10-2001 04:25:38 (UTC)
  • 27-10-2001 06:25:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3250, 10.6110 at 14 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
Montescudaio PI 2 2144 2144
Guardistallo PI 2 1234 3378
Casale Marittimo PI 3 1122 4500
Riparbella PI 5 1603 6103
Bibbona LI 6 3175 9278
Cecina LI 8 28046 37324
Castellina Marittima PI 10 2025 39349
Montecatini Val di Cecina PI 14 1749 41098
Rosignano Marittimo LI 14 31394 72492
Santa Luce PI 17 1684 74176
Chianni PI 18 1392 75568
Castagneto Carducci LI 18 9010 84578
Monteverdi Marittimo PI 18 758 85336
Lajatico PI 19 1336 86672

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Livorno (159219 inhabitants)
47 Km SE of Pisa (89158 inhabitants)
58 Km W of Siena (53903 inhabitants)
59 Km S of Lucca (89046 inhabitants)
67 Km SW of Scandicci (50609 inhabitants)
67 Km SE of Viareggio (62467 inhabitants)
72 Km SW of Firenze (382808 inhabitants)
72 Km SW of Pistoia (90315 inhabitants)
73 Km SW of Prato (191150 inhabitants)
75 Km NW of Grosseto (82087 inhabitants)
88 Km SE of Massa (69479 inhabitants)
93 Km SE of Carrara (63133 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 2001-10-27
04:25:38
43.325 10.611 14 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 429849
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2001-10-27 04:25:38 ± 0.476
Latitude 43.3250 ± 0.0189
Longitude 10.6110 ± 0.0343
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 429849

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 3482.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 291
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00955
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 429849
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:45:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SFI.Z. 2001-10-27T04:26:13.27 10.0 undecidable manual SN 56 1.0656 -0.21 0.6
--.SFI.Z. 2001-10-27T04:25:59.13 10.0 undecidable manual PN 56 1.0656 0.47 0.7
--.PGD.Z. 2001-10-27T04:25:57.70 10.0 undecidable manual PN 55 0.9657 -0.33 1.2
--.CSNT.Z. 2001-10-27T04:25:56.69 10.0 undecidable manual SG 73 0.5106 -0.23 0.7
--.GRFL.Z. 2001-10-27T04:25:51.13 10.0 undecidable manual SG 123 0.3108 0.43 0.4
--.CSNT.Z. 2001-10-27T04:25:49.29 10.0 undecidable manual PG 73 0.5106 0.19 2
--.GRFL.Z. 2001-10-27T04:25:45.19 10.0 undecidable manual PG 123 0.3108 -0.32 1.5
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