Earthquake with magnitude of Md 2.6 on date 09-04-1987 and time 20:14:40 (Italy) in region 8 km S Bertinoro (FC)

A magnitude Md 2.6 earthquake occured in region: 8 km S Bertinoro (FC), on

  • 09-04-1987 18:14:40 (UTC)
  • 09-04-1987 20:14:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.08, 12.14 at 5 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
Bertinoro FC 8 11059 11059
Meldola FC 8 9970 21029
Cesena FC 10 96758 117787
Forlimpopoli FC 12 13290 131077
Predappio FC 13 6346 137423
Montiano FC 13 1716 139139
Mercato Saraceno FC 14 6886 146025
Roncofreddo FC 15 3386 149411
Longiano FC 15 7126 156537
Sogliano al Rubicone FC 15 3195 159732
Gambettola FC 17 10660 170392
Sarsina FC 18 3446 173838
Forlì FC 18 117913 291751
Borghi FC 18 2843 294594
Civitella di Romagna FC 18 3786 298380
Castrocaro Terme e Terra del Sole FC 19 6426 304806

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SW of Cesena (96758 inhabitants)
18 Km SE of Forlì (117913 inhabitants)
31 Km SE of Faenza (58541 inhabitants)
34 Km W of Rimini (147750 inhabitants)
38 Km S of Ravenna (159116 inhabitants)
46 Km SE of Imola (69797 inhabitants)
65 Km W of Pesaro (94582 inhabitants)
71 Km NE of Arezzo (99543 inhabitants)
75 Km W of Fano (60888 inhabitants)
79 Km SE of Bologna (386663 inhabitants)
79 Km E of Firenze (382808 inhabitants)
85 Km E of Scandicci (50609 inhabitants)
86 Km E of Prato (191150 inhabitants)
94 Km SE of Ferrara (133155 inhabitants)
99 Km E of Pistoia (90315 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 2.6 1987-04-09
18:14:40
44.08 12.14 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 44529
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-09 18:14:40 ± 0.353
Latitude 44.08 ± 0.02
Longitude 12.14 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44529

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) 2679.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 225
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00324
Epicentral distance of station farthest from the epicenter (degree) 0.01093
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 44529
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BDI.Z. 1987-04-09T18:15:19.00 10.0 undecidable manual SN 269 0.01 0.38 0.6
--.ASS.Z. 1987-04-09T18:15:17.50 10.0 undecidable manual SN 159 0.0097 -0.46 0.5
--.ARV.Z. 1987-04-09T18:15:09.50 10.0 undecidable manual SG 134 0.0074 -0.08 0.8
--.PS9.Z. 1987-04-09T18:15:04.00 10.0 undecidable manual PN 253 0.0109 0.02 1.6
--.ASS.Z. 1987-04-09T18:15:03.50 10.0 undecidable manual PN 159 0.0097 1.41 0.2
--.BDI.Z. 1987-04-09T18:15:02.50 10.0 undecidable manual PN 269 0.01 0.03 1.7
--.CRE.Z. 1987-04-09T18:14:59.30 10.0 undecidable manual SG 196 0.0043 0.63 0.8
--.ARV.Z. 1987-04-09T18:14:56.50 10.0 undecidable manual PG 134 0.0074 -0.75 1
--.PGD.Z. 1987-04-09T18:14:54.50 10.0 undecidable manual SG 235 0.0032 -0.05 0.8
--.CRE.Z. 1987-04-09T18:14:50.50 10.0 undecidable manual PG 196 0.0043 -0.45 1.6
--.PGD.Z. 1987-04-09T18:14:48.00 10.0 undecidable manual PG 235 0.0032 -0.57 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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