Earthquake with magnitude of Md 2.2 on date 19-10-1986 and time 11:09:49 (Italy) in region 1 km NW Castelnuovo di Val di Cecina (PI)

A magnitude Md 2.2 earthquake occured in region: 1 km NW Castelnuovo di Val di Cecina (PI), on

  • 19-10-1986 10:09:49 (UTC)
  • 19-10-1986 11:09:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2190, 10.8980 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
Castelnuovo di Val di Cecina PI 1 2231 2231
Monterotondo Marittimo GR 9 1371 3602
Pomarance PI 9 5897 9499
Radicondoli SI 13 914 10413
Montieri GR 14 1204 11617
Monteverdi Marittimo PI 15 758 12375
Chiusdino SI 17 1903 14278
Casole d'Elsa SI 18 3897 18175
Massa Marittima GR 19 8375 26550

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Siena (53903 inhabitants)
54 Km NW of Grosseto (82087 inhabitants)
60 Km SE of Livorno (159219 inhabitants)
64 Km SW of Scandicci (50609 inhabitants)
68 Km SW of Firenze (382808 inhabitants)
68 Km SE of Pisa (89158 inhabitants)
75 Km S of Prato (191150 inhabitants)
77 Km SE of Lucca (89046 inhabitants)
80 Km S of Pistoia (90315 inhabitants)
84 Km W of Arezzo (99543 inhabitants)
89 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 2.2 1986-10-19
10:09:49
43.219 10.898 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 36139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-19 10:09:49 ± 0.407
Latitude 43.2190 ± 0.0269
Longitude 10.8980 ± 0.0595
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 36139

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) 5674.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00510
Epicentral distance of station farthest from the epicenter (degree) 0.00777
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 36139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:36:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.CRE.Z. 1986-10-19T10:10:20.50 10.0 undecidable manual SG 61 0.8547 1.59 0.1
--.PS9.Z. 1986-10-19T10:10:10.50 10.0 undecidable manual SG 331 0.5661 0.98 0.5
--.BDI.Z. 1986-10-19T10:10:06.00 10.0 undecidable manual PG 345 0.8658 -0.53 1.3
--.MAO.Z. 1986-10-19T10:10:06.00 10.0 undecidable manual PG 166 0.8214 0.35 1.6
--.CRE.Z. 1986-10-19T10:10:05.50 10.0 undecidable manual PG 61 0.8547 -0.89 0.8
--.PS9.Z. 1986-10-19T10:10:00.80 10.0 undecidable manual PG 331 0.5661 -0.17 1.8
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