Earthquake with magnitude of Md 2.5 on date 02-06-1985 and time 16:00:05 (UTC) in region 8 km NE Loro Ciuffenna (AR)

A magnitude Md 2.5 earthquake occured in region: 8 km NE Loro Ciuffenna (AR), on

  • 02-06-1985 16:00:05 (UTC)
  • 02-06-1985 18:00:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.66, 11.66 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
Loro Ciuffenna AR 8 5819 5819
Ortignano Raggiolo AR 8 878 6697
Castelfranco Piandiscò AR 10 9632 16329
Montemignaio AR 10 566 16895
Castel San Niccolò AR 10 2707 19602
Reggello FI 11 16290 35892
Poppi AR 11 6160 42052
Talla AR 12 1062 43114
Bibbiena AR 13 12241 55355
Terranuova Bracciolini AR 13 12346 67701
Castel Focognano AR 14 3149 70850
San Giovanni Valdarno AR 15 17018 87868
Pratovecchio Stia AR 15 5845 93713
Castiglion Fibocchi AR 17 2167 95880
Montevarchi AR 17 24378 120258
Laterina AR 17 3517 123775
Figline e Incisa Valdarno FI 17 23505 147280
Chitignano AR 17 899 148179
Pelago FI 18 7660 155839
Rignano sull'Arno FI 18 8651 164490
Capolona AR 19 5438 169928
Subbiano AR 19 6331 176259

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Arezzo (99543 inhabitants)
35 Km E of Firenze (382808 inhabitants)
40 Km E of Scandicci (50609 inhabitants)
46 Km NE of Siena (53903 inhabitants)
52 Km E of Prato (191150 inhabitants)
67 Km E of Pistoia (90315 inhabitants)
70 Km SW of Forlì (117913 inhabitants)
71 Km SW of Cesena (96758 inhabitants)
72 Km S of Faenza (58541 inhabitants)
78 Km S of Imola (69797 inhabitants)
85 Km NW of Perugia (166134 inhabitants)
85 Km SW of Rimini (147750 inhabitants)
95 Km SW of Ravenna (159116 inhabitants)
96 Km E of Lucca (89046 inhabitants)
97 Km S of Bologna (386663 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
Rev 1000 Md 2.5 1985-06-02
16:00:05
43.66 11.67 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 7869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-02 16:00:05 ± 0.877
Latitude 43.66 ± 0.03
Longitude 11.67 ± 0.02
Depth (km) 10 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7869

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) 4026.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.02728
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 7869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:12:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1985-06-02T16:00:53.50 10.0 undecidable manual PN 14 0.0273 0.65 0.6
--.CTI.Z. 1985-06-02T16:00:43.00 10.0 undecidable manual PN 359 0.0215 -0.94 0.4
--.AR1.Z. 1985-06-02T16:00:37.00 10.0 undecidable manual SG 99 0.0084 -0.15 0.7
--.BD1.Z. 1985-06-02T16:00:35.50 10.0 undecidable manual SG 298 0.0078 0.57 0.5
--.PO9.Z. 1985-06-02T16:00:31.50 10.0 undecidable manual PN 139 0.0128 0.73 0.8
--.AR1.Z. 1985-06-02T16:00:23.50 10.0 undecidable manual PG 99 0.0084 -0.08 1.8
--.BD1.Z. 1985-06-02T16:00:22.00 10.0 undecidable manual PG 298 0.0078 -0.3 1.6
--.AS1.Z. 1985-06-02T16:00:22.50 10.0 undecidable manual PG 129 0.0083 -0.97 0.5
--.PS9.Z. 1985-06-02T16:00:21.50 10.0 undecidable manual PG 274 0.0074 -0.02 1.8
--.CH1.Z. 1985-06-02T16:00:10.50 10.0 undecidable manual PG 98 0.0018 0.48 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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