Earthquake with magnitude of Md 2.4 on date 03-05-1986 and time 05:46:14 (Italy) in region 3 km E Torrita di Siena (SI)

A magnitude Md 2.4 earthquake occured in region: 3 km E Torrita di Siena (SI), on

  • 03-05-1986 03:46:14 (UTC)
  • 03-05-1986 05:46:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1770, 11.8030 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
Torrita di Siena SI 3 7434 7434
Sinalunga SI 7 12764 20198
Foiano della Chiana AR 9 9516 29714
Montepulciano SI 9 14097 43811
Trequanda SI 11 1254 45065
Lucignano AR 12 3581 48646
Chianciano Terme SI 13 7105 55751
Marciano della Chiana AR 14 3466 59217
Pienza SI 15 2107 61324
San Giovanni d'Asso SI 17 853 62177
Monte San Savino AR 18 8743 70920
Cortona AR 19 22450 93370

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km S of Arezzo (99543 inhabitants)
41 Km E of Siena (53903 inhabitants)
48 Km W of Perugia (166134 inhabitants)
73 Km NE of Grosseto (82087 inhabitants)
77 Km W of Foligno (57155 inhabitants)
79 Km SE of Firenze (382808 inhabitants)
82 Km SE of Scandicci (50609 inhabitants)
88 Km N of Viterbo (67173 inhabitants)
97 Km SE of Prato (191150 inhabitants)
97 Km NW of Terni (111501 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 2.4 1986-05-03
03:46:14
43.177 11.803 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 26359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-05-03 03:46:14 ± 0.531
Latitude 43.1770 ± 0.0335
Longitude 11.8030 ± 0.0446
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 26359

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) 5192.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 200
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00405
Epicentral distance of station farthest from the epicenter (degree) 0.01117
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 26359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:28:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.BDI.Z. 1986-05-03T03:46:36.34 10.0 undecidable manual PN 315 1.2432 -0.84 0.8
--.PS9.Z. 1986-05-03T03:46:35.86 10.0 undecidable manual PN 300 1.0656 0.97 0.7
--.CRE.Z. 1986-05-03T03:46:31.50 10.0 undecidable manual SG 13 0.444 0.89 0.6
--.ASS.Z. 1986-05-03T03:46:27.00 10.0 undecidable manual PG 100 0.6327 0.16 1.8
--.CRE.Z. 1986-05-03T03:46:22.80 10.0 undecidable manual PG 13 0.444 -0.82 1.1
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