Earthquake with magnitude of Md 3.3 on date 01-10-1986 and time 23:47:05 (Italy) in region 7 km SW Casola Valsenio (RA)

A magnitude Md 3.3 earthquake occured in region: 7 km SW Casola Valsenio (RA), on

  • 01-10-1986 22:47:05 (UTC)
  • 01-10-1986 23:47:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.17, 11.59 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
Casola Valsenio RA 7 2617 2617
Palazzuolo sul Senio FI 7 1154 3771
Castel del Rio BO 8 1246 5017
Fontanelice BO 10 1943 6960
Marradi FI 11 3139 10099
Borgo Tossignano BO 12 3288 13387
Casalfiumanese BO 14 3438 16825
Brisighella RA 16 7639 24464
Riolo Terme RA 16 5720 30184
Tredozio FC 16 1212 31396
Modigliana FC 17 4560 35956
Firenzuola FI 18 4726 40682

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Imola (69797 inhabitants)
27 Km W of Faenza (58541 inhabitants)
37 Km W of Forlì (117913 inhabitants)
41 Km SE of Bologna (386663 inhabitants)
51 Km NE of Prato (191150 inhabitants)
52 Km NE of Firenze (382808 inhabitants)
53 Km W of Cesena (96758 inhabitants)
56 Km W of Ravenna (159116 inhabitants)
56 Km NE of Scandicci (50609 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
74 Km S of Ferrara (133155 inhabitants)
74 Km SE of Modena (184973 inhabitants)
79 Km W of Rimini (147750 inhabitants)
82 Km NW of Arezzo (99543 inhabitants)
88 Km SE of Carpi (70699 inhabitants)
94 Km E of Lucca (89046 inhabitants)
96 Km SE of Reggio nell'Emilia (171345 inhabitants)
97 Km N of Siena (53903 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 3.3 1986-10-01
22:47:05
44.17 11.59 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 34999
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-01 22:47:05 ± 0.923
Latitude 44.17 ± 0.02
Longitude 11.59 ± 0.02
Depth (km) 10 ± 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 34999

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) 2569.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
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) 0.00413
Epicentral distance of station farthest from the epicenter (degree) 0.04444
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 42
Magnitude information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 34999
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BSF.Z. 1986-10-01T22:48:18.00 10.0 undecidable manual PN 319 0.0444 -1.57 0.3
--.CKI.Z. 1986-10-01T22:48:14.00 10.0 undecidable manual SN 276 0.0214 1.28 0.3
--.TRI.Z. 1986-10-01T22:48:07.00 10.0 undecidable manual SN 44 0.0195 -0.86 0.4
--.LRG.Z. 1986-10-01T22:48:04.40 10.0 undecidable manual PN 260 0.0345 0.05 1.3
--.BN9.Z. 1986-10-01T22:48:02.00 10.0 undecidable manual PN 285 0.0324 0.88 0.9
--.LMR.Z. 1986-10-01T22:48:02.60 10.0 undecidable manual PN 258 0.0338 -0.7 1
--.LPG.Z. 1986-10-01T22:48:01.00 10.0 undecidable manual PN 292 0.033 -1.13 0.6
--.FRF.Z. 1986-10-01T22:48:01.20 10.0 undecidable manual PN 261 0.0325 -0.06 1.4
--.SAX.Z. 1986-10-01T22:48:00.00 10.0 undecidable manual PN 333 0.031 0.93 0.8
--.MUO.Z. 1986-10-01T22:48:00.30 10.0 undecidable manual PN 324 0.0312 0.66 1.1
--.LSD.Z. 1986-10-01T22:47:57.50 10.0 undecidable manual PN 293 0.0305 -0.78 1
--.LLS.Z. 1986-10-01T22:47:56.90 10.0 undecidable manual PN 326 0.029 0.91 0.9
--.SAL.Z. 1986-10-01T22:47:56.00 10.0 undecidable manual SN 332 0.0146 1.35 0.3
--.MMK.Z. 1986-10-01T22:47:56.10 10.0 undecidable manual PN 307 0.0285 0.88 0.9
--.SOO.Z. 1986-10-01T22:47:55.80 10.0 undecidable manual PN 277 0.029 -0.14 1.5
--.DA9.Z. 1986-10-01T22:47:55.00 10.0 undecidable manual PN 277 0.0281 0.47 1.3
--.STV.Z. 1986-10-01T22:47:53.60 10.0 undecidable manual PN 272 0.0274 0.04 1.5
--.SBF.Z. 1986-10-01T22:47:53.50 10.0 undecidable manual PN 265 0.027 0.63 1.2
--.ENR.Z. 1986-10-01T22:47:53.30 10.0 undecidable manual PN 272 0.0268 0.63 1.2
--.ORO.Z. 1986-10-01T22:47:51.00 10.0 undecidable manual PN? 300 0.0264 -1.02 0.3
--.ORX.Z. 1986-10-01T22:47:50.40 10.0 undecidable manual PN 300 0.0264 -1.65 0.3
--.LJU.Z. 1986-10-01T22:47:50.30 10.0 undecidable manual PN 46 0.0251 0.27 1.6
--.VDL.Z. 1986-10-01T22:47:49.30 10.0 undecidable manual PN 327 0.0247 -0.14 1.6
--.ROB.Z. 1986-10-01T22:47:48.00 10.0 undecidable manual PN 273 0.024 -0.23 1.6
--.IMP.Z. 1986-10-01T22:47:47.60 10.0 undecidable manual PN 265 0.024 -0.68 1.3
--.RBL.Z. 1986-10-01T22:47:47.00 10.0 undecidable manual PN? 30 0.0239 -1.22 0.3
--.CEY.Z. 1986-10-01T22:47:46.00 10.0 undecidable manual PN 50 0.0229 -0.65 1.3
--.CVF.Z. 1986-10-01T22:47:46.00 10.0 undecidable manual PN 231 0.0228 -0.6 1.4
--.VAI.Z. 1986-10-01T22:47:46.50 10.0 undecidable manual PN 311 0.0235 -1.05 0.8
--.CKI.Z. 1986-10-01T22:47:45.00 10.0 undecidable manual PN 276 0.0214 0.65 1.3
--.FIN.Z. 1986-10-01T22:47:44.20 10.0 undecidable manual PN 271 0.0218 -0.72 1.3
--.VOY.Z. 1986-10-01T22:47:44.80 10.0 undecidable manual PN 40 0.0222 -0.8 1.2
--.MDI.Z. 1986-10-01T22:47:42.00 10.0 undecidable manual PN? 320 0.0187 1.74 0.1
--.TRI.Z. 1986-10-01T22:47:41.00 10.0 undecidable manual PN 44 0.0195 -0.55 1.5
--.GEN.Z. 1986-10-01T22:47:38.30 10.0 undecidable manual PN 278 0.0172 0.38 1.6
--.CO9.Z. 1986-10-01T22:47:36.00 10.0 undecidable manual PN 291 0.0147 1.84 0.2
--.CTI.Z. 1986-10-01T22:47:36.00 10.0 undecidable manual PN 1 0.0168 -1.43 0.5
--.SAL.Z. 1986-10-01T22:47:35.50 10.0 undecidable manual PN 332 0.0146 1.58 0.4
--.VEA.Z. 1986-10-01T22:47:34.20 10.0 undecidable manual PN 297 0.0142 0.9 1.1
--.PS9.Z. 1986-10-01T22:47:34.50 10.0 undecidable manual SG 239 0.0079 -1.55 0.2
--.BDI.Z. 1986-10-01T22:47:29.00 10.0 undecidable manual SG 261 0.0064 -1.63 0.1
--.BVT.Z. 1986-10-01T22:47:29.80 10.0 undecidable manual PN 283 0.0117 0.23 1.7
--.CRE.Z. 1986-10-01T22:47:27.50 10.0 undecidable manual SG 154 0.0054 0.33 0.7
--.PRO.Z. 1986-10-01T22:47:24.90 10.0 undecidable manual PG 104 0.0087 0.29 1.7
--.PS9.Z. 1986-10-01T22:47:22.50 10.0 positive manual PG 239 0.0079 -0.69 2.6
--.BDI.Z. 1986-10-01T22:47:20.50 10.0 undecidable manual PG 261 0.0064 0.45 1.5
--.CRE.Z. 1986-10-01T22:47:19.00 10.0 undecidable manual PG 154 0.0054 0.95 1
--.FIR.Z. 1986-10-01T22:47:16.50 10.0 undecidable manual PG 210 0.0041 1.16 0.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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