Earthquake with magnitude of Md 2.4 on date 01-04-1987 and time 12:37:35 (Italy) in region 4 km SE Bertinoro (FC)

A magnitude Md 2.4 earthquake occured in region: 4 km SE Bertinoro (FC), on

  • 01-04-1987 10:37:35 (UTC)
  • 01-04-1987 12:37:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.12, 12.18 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
Bertinoro FC 4 11059 11059
Cesena FC 5 96758 107817
Forlimpopoli FC 8 13290 121107
Meldola FC 9 9970 131077
Montiano FC 11 1716 132793
Gambettola FC 13 10660 143453
Longiano FC 13 7126 150579
Roncofreddo FC 15 3386 153965
Forlì FC 15 117913 271878
Predappio FC 16 6346 278224
Sogliano al Rubicone FC 17 3195 281419
Gatteo FC 17 9068 290487
Borghi FC 18 2843 293330
Savignano sul Rubicone FC 18 17766 311096
Mercato Saraceno FC 19 6886 317982
Castrocaro Terme e Terra del Sole FC 19 6426 324408
San Mauro Pascoli FC 19 11690 336098
Cesenatico FC 19 25796 361894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of Cesena (96758 inhabitants)
15 Km SE of Forlì (117913 inhabitants)
30 Km SE of Faenza (58541 inhabitants)
32 Km W of Rimini (147750 inhabitants)
33 Km S of Ravenna (159116 inhabitants)
45 Km SE of Imola (69797 inhabitants)
64 Km W of Pesaro (94582 inhabitants)
74 Km W of Fano (60888 inhabitants)
77 Km NE of Arezzo (99543 inhabitants)
78 Km SE of Bologna (386663 inhabitants)
84 Km E of Firenze (382808 inhabitants)
90 Km E of Scandicci (50609 inhabitants)
91 Km E of Prato (191150 inhabitants)
91 Km SE of Ferrara (133155 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 2.4 1987-04-01
10:37:35
44.13 12.18 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 43919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-01 10:37:35 ± 0.448
Latitude 44.13 ± 0.02
Longitude 12.18 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 43919

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) 3001.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.0102
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 43919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-04-01T10:38:04.50 10.0 undecidable manual SG 138 0.0074 0.38 0.9
--.ASS.Z. 1987-04-01T10:37:58.00 10.0 undecidable manual PN? 161 0.01 1.21 0.1
--.BDI.Z. 1987-04-01T10:37:57.50 10.0 undecidable manual PN 267 0.0102 0.43 1.2
--.CRE.Z. 1987-04-01T10:37:54.50 10.0 undecidable manual SG 197 0.0048 0.13 0.9
--.ARV.Z. 1987-04-01T10:37:51.20 10.0 undecidable manual PG 138 0.0074 -0.79 0.7
--.PGD.Z. 1987-04-01T10:37:50.50 10.0 undecidable manual SG 232 0.0036 -0.07 0.9
--.SS9.Z. 1987-04-01T10:37:47.50 10.0 undecidable manual SG 228 0.0028 0.2 0.8
--.CRE.Z. 1987-04-01T10:37:46.00 10.0 undecidable manual PG 197 0.0048 -0.36 1.7
--.PGD.Z. 1987-04-01T10:37:43.50 10.0 undecidable manual PG 232 0.0036 -0.66 1
--.SS9.Z. 1987-04-01T10:37:42.00 10.0 undecidable manual PG 228 0.0028 -0.28 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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