Earthquake with magnitude of Md 3.0 on date 03-04-1985 and time 18:23:32 (UTC) in region 2 km W Castel Focognano (AR)

A magnitude Md 3.0 earthquake occured in region: 2 km W Castel Focognano (AR), on

  • 03-04-1985 18:23:32 (UTC)
  • 03-04-1985 20:23:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.66, 11.82 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
Castel Focognano AR 2 3149 3149
Bibbiena AR 4 12241 15390
Chitignano AR 5 899 16289
Ortignano Raggiolo AR 6 878 17167
Talla AR 7 1062 18229
Poppi AR 9 6160 24389
Subbiano AR 10 6331 30720
Chiusi della Verna AR 11 2023 32743
Capolona AR 11 5438 38181
Castel San Niccolò AR 13 2707 40888
Caprese Michelangelo AR 14 1426 42314
Castiglion Fibocchi AR 15 2167 44481
Loro Ciuffenna AR 17 5819 50300
Pratovecchio Stia AR 17 5845 56145
Pieve Santo Stefano AR 18 3183 59328
Montemignaio AR 18 566 59894
Laterina AR 19 3517 63411

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Arezzo (99543 inhabitants)
47 Km E of Firenze (382808 inhabitants)
52 Km E of Scandicci (50609 inhabitants)
54 Km NE of Siena (53903 inhabitants)
63 Km E of Prato (191150 inhabitants)
63 Km SW of Cesena (96758 inhabitants)
65 Km S of Forlì (117913 inhabitants)
70 Km S of Faenza (58541 inhabitants)
75 Km SW of Rimini (147750 inhabitants)
77 Km NW of Perugia (166134 inhabitants)
78 Km S of Imola (69797 inhabitants)
79 Km E of Pistoia (90315 inhabitants)
90 Km SW of Ravenna (159116 inhabitants)
92 Km W of Pesaro (94582 inhabitants)
99 Km W of Fano (60888 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 3.0 1985-04-03
18:23:32
43.66 11.82 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-03 18:23:32 ± 0.243
Latitude 43.66 ± 0.03
Longitude 11.82 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3989

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) 3800.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.1
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.03562
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitude information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 3989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.STV.Z. 1985-04-03T18:25:02.50 10.0 undecidable manual SN 282 0.0295 1.34 0.4
--.ROB.Z. 1985-04-03T18:24:53.00 10.0 undecidable manual SN 284 0.0261 0.73 0.6
--.CTI.Z. 1985-04-03T18:24:41.00 10.0 undecidable manual SN 357 0.0215 1.03 0.5
--.LRG.Z. 1985-04-03T18:24:33.10 10.0 undecidable manual PN 269 0.0356 0.1 1.4
--.LMR.Z. 1985-04-03T18:24:33.00 10.0 undecidable manual PN 267 0.0347 1.31 0.8
--.FRF.Z. 1985-04-03T18:24:29.40 10.0 undecidable manual PN 270 0.0337 -0.66 1.2
--.ORO.Z. 1985-04-03T18:24:25.50 10.0 undecidable manual PN 307 0.0303 0.65 1.3
--.STV.Z. 1985-04-03T18:24:23.50 10.0 undecidable manual PN 282 0.0295 -0.23 1.5
--.FO1.Z. 1985-04-03T18:24:21.00 10.0 undecidable manual PN 12 0.027 0.98 1.2
--.RBL.Z. 1985-04-03T18:24:21.00 10.0 undecidable manual PN 23 0.0274 0.55 1.5
--.ROB.Z. 1985-04-03T18:24:18.00 10.0 undecidable manual PN 284 0.0261 -0.61 1.5
--.PO9.Z. 1985-04-03T18:24:17.00 10.0 undecidable manual SN 142 0.0121 1.62 0.4
--.TRI.Z. 1985-04-03T18:24:15.00 10.0 undecidable manual PN? 33 0.0222 2.38 0.1
--.CK1.Z. 1985-04-03T18:24:14.50 10.0 undecidable manual PN 287 0.0239 -0.61 1.6
--.SD1.Z. 1985-04-03T18:24:14.00 10.0 undecidable manual PN 142 0.0219 1.89 0.6
--.CTI.Z. 1985-04-03T18:24:11.50 10.0 undecidable manual PN 357 0.0215 0 1.9
--.SAL.Z. 1985-04-03T18:24:10.50 10.0 undecidable manual PN? 335 0.0193 2.25 0.2
--.BD1.Z. 1985-04-03T18:24:06.50 10.0 undecidable manual SG 295 0.0087 0.88 0.7
--.PS9.Z. 1985-04-03T18:24:03.00 10.0 undecidable manual SG 274 0.0084 -1.63 0.4
--.MNS.Z. 1985-04-03T18:24:01.00 10.0 undecidable manual PN? 153 0.0127 2.84 0.1
--.AR1.Z. 1985-04-03T18:24:00.00 10.0 undecidable manual SG 100 0.0074 -1.15 0.6
--.AS1.Z. 1985-04-03T18:24:00.00 10.0 undecidable manual SG 134 0.0076 -1.79 0.3
--.PRG.Z. 1985-04-03T18:23:58.00 10.0 undecidable manual SG 142 0.0062 1.1 0.9
--.PO9.Z. 1985-04-03T18:23:58.00 10.0 undecidable manual PN 142 0.0121 0.69 1.8
--.BD1.Z. 1985-04-03T18:23:51.00 10.0 undecidable manual PG 295 0.0087 -0.67 1.8
--.PS9.Z. 1985-04-03T18:23:49.50 10.0 undecidable manual PG 274 0.0084 -1.6 0.9
--.AS1.Z. 1985-04-03T18:23:48.00 10.0 undecidable manual PG 134 0.0076 -1.46 1.1
--.PRG.Z. 1985-04-03T18:23:48.00 10.0 undecidable manual PG 142 0.0062 1.36 2.4
--.AR1.Z. 1985-04-03T18:23:47.80 10.0 undecidable manual PG 100 0.0074 -1.29 1.2
--.FIR.Z. 1985-04-03T18:23:40.00 10.0 undecidable manual PG 286 0.0038 -1.56 1
--.CH1.Z. 1985-04-03T18:23:36.00 10.0 undecidable manual SG 107 0.0008 -1.75 0.5
--.CH1.Z. 1985-04-03T18:23:34.00 10.0 negative manual PG 107 0.0008 -1.58 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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