Earthquake with magnitude of Md 2.1 on date 29-12-1990 and time 20:38:52 (UTC) in region 5 km SE Casole d'Elsa (SI)

A magnitude Md 2.1 earthquake occured in region: 5 km SE Casole d'Elsa (SI), on

  • 29-12-1990 20:38:52 (UTC)
  • 29-12-1990 21:38:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.305, 11.083 at 10 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
Casole d'Elsa SI 5 3897 3897
Radicondoli SI 6 914 4811
Sovicille SI 12 10116 14927
Colle di Val d'Elsa SI 13 21620 36547
Monteriggioni SI 15 9810 46357
Chiusdino SI 17 1903 48260
Pomarance PI 17 5897 54157
Castelnuovo di Val di Cecina PI 18 2231 56388
San Gimignano SI 19 7820 64208
Poggibonsi SI 19 29196 93404
Monticiano SI 20 1571 94975
Montieri GR 20 1204 96179

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Siena (53903 inhabitants)
51 Km S of Scandicci (50609 inhabitants)
54 Km S of Firenze (382808 inhabitants)
61 Km N of Grosseto (82087 inhabitants)
64 Km S of Prato (191150 inhabitants)
67 Km W of Arezzo (99543 inhabitants)
68 Km E of Livorno (159219 inhabitants)
71 Km S of Pistoia (90315 inhabitants)
72 Km SE of Pisa (89158 inhabitants)
76 Km SE of Lucca (89046 inhabitants)
92 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 2.1
ML-VAX 1.7
1990-12-29
20:38:52
43.305 11.083 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 133209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-12-29 20:38:52 ± 0.487
Latitude 43.3050 ± 0.0306
Longitude 11.0830 ± 0.0181
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 133209

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) 3700.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 252
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00518
Epicentral distance of station farthest from the epicenter (degree) 0.00745
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 133209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:04:07

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 133209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BDI.Z. 1990-12-29T20:39:21.00 10.0 undecidable manual SG 334 0.0074 0.04 0.7
--.CRE.Z. 1990-12-29T20:39:16.40 10.0 undecidable manual SG 62 0.0063 -0.72 0
--.PII.Z. 1990-12-29T20:39:13.00 10.0 undecidable manual SG 315 0.0052 0.18 0.7
--.BDI.Z. 1990-12-29T20:39:08.95 10.0 undecidable manual PG 334 0.0074 0.13 1.7
--.SFI.Z. 1990-12-29T20:39:08.71 10.0 undecidable manual PG 42 0.0073 0.23 1.4
--.CRE.Z. 1990-12-29T20:39:06.62 10.0 undecidable manual PG 62 0.0063 0.21 1.5
--.PII.Z. 1990-12-29T20:39:03.78 10.0 undecidable manual PG 315 0.0052 -0.34 1
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