Earthquake with magnitude of Md 2.5 on date 15-04-1987 and time 21:56:38 (Italy) in region 2 km NE Bertinoro (FC)

A magnitude Md 2.5 earthquake occured in region: 2 km NE Bertinoro (FC), on

  • 15-04-1987 19:56:38 (UTC)
  • 15-04-1987 21:56:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 12.16 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 2 11059 11059
Forlimpopoli FC 4 13290 24349
Cesena FC 7 96758 121107
Meldola FC 8 9970 131077
Forlì FC 12 117913 248990
Montiano FC 14 1716 250706
Gambettola FC 15 10660 261366
Predappio FC 15 6346 267712
Longiano FC 17 7126 274838
Castrocaro Terme e Terra del Sole FC 17 6426 281264
Roncofreddo FC 18 3386 284650
Gatteo FC 19 9068 293718
Cervia RA 19 28940 322658
Cesenatico FC 20 25796 348454

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Cesena (96758 inhabitants)
12 Km SE of Forlì (117913 inhabitants)
26 Km SE of Faenza (58541 inhabitants)
29 Km S of Ravenna (159116 inhabitants)
34 Km W of Rimini (147750 inhabitants)
41 Km SE of Imola (69797 inhabitants)
67 Km W of Pesaro (94582 inhabitants)
75 Km E of Bologna (386663 inhabitants)
77 Km W of Fano (60888 inhabitants)
80 Km N of Arezzo (99543 inhabitants)
84 Km NE of Firenze (382808 inhabitants)
87 Km SE of Ferrara (133155 inhabitants)
90 Km E of Scandicci (50609 inhabitants)
90 Km E of Prato (191150 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 1987-04-15
19:56:38
44.16 12.16 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 44919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-15 19:56:38 ± 0.403
Latitude 44.16 ± 0.03
Longitude 12.16 ± 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 44919

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) 3299.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.01724
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 44919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BDI.Z. 1987-04-15T19:57:18.50 10.0 undecidable manual SN 265 0.01 1.3 0.2
--.TRI.Z. 1987-04-15T19:57:10.50 10.0 undecidable manual PN 35 0.0172 -1.35 0.3
--.ARV.Z. 1987-04-15T19:57:09.50 10.0 undecidable manual SG 138 0.0078 0.05 0.8
--.AM8.Z. 1987-04-15T19:57:03.23 10.0 undecidable manual PN 119 0.0108 1.19 0.5
--.CM8.Z. 1987-04-15T19:57:02.19 10.0 undecidable manual PN 142 0.0108 0.25 1.6
--.ASS.Z. 1987-04-15T19:57:02.00 10.0 undecidable manual PN 161 0.0104 0.69 1.2
--.BDI.Z. 1987-04-15T19:57:01.50 10.0 undecidable manual PN 265 0.01 0.59 1.3
--.CRE.Z. 1987-04-15T19:56:59.00 10.0 undecidable manual SG 195 0.005 -0.46 0.6
--.ARV.Z. 1987-04-15T19:56:55.50 10.0 undecidable manual PG 138 0.0078 -0.92 1
--.PGD.Z. 1987-04-15T19:56:54.80 10.0 undecidable manual SG 227 0.0037 -0.21 1.1
--.PRO.Z. 1987-04-15T19:56:51.20 10.0 undecidable manual PG 114 0.0051 0.27 1.8
--.CRE.Z. 1987-04-15T19:56:50.00 10.0 undecidable manual PG 195 0.005 -0.66 1.3
--.PGD.Z. 1987-04-15T19:56:47.50 10.0 undecidable manual PG 227 0.0037 -0.59 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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