Earthquake with magnitude of Md 2.5 on date 28-03-1987 and time 12:59:13 (Italy) in region 7 km N Cesena (FC)

A magnitude Md 2.5 earthquake occured in region: 7 km N Cesena (FC), on

  • 28-03-1987 11:59:13 (UTC)
  • 28-03-1987 12:59:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2, 12.24 at 6 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
Cesena FC 7 96758 96758
Forlimpopoli FC 9 13290 110048
Bertinoro FC 10 11059 121107
Cervia RA 11 28940 150047
Gambettola FC 12 10660 160707
Cesenatico FC 13 25796 186503
Montiano FC 14 1716 188219
Forlì FC 16 117913 306132
Gatteo FC 16 9068 315200
Longiano FC 16 7126 322326
Meldola FC 16 9970 332296
Savignano sul Rubicone FC 18 17766 350062
San Mauro Pascoli FC 18 11690 361752
Bellaria-Igea Marina RN 19 19519 381271
Roncofreddo FC 19 3386 384657

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Cesena (96758 inhabitants)
16 Km E of Forlì (117913 inhabitants)
24 Km S of Ravenna (159116 inhabitants)
30 Km E of Faenza (58541 inhabitants)
31 Km NW of Rimini (147750 inhabitants)
45 Km E of Imola (69797 inhabitants)
63 Km NW of Pesaro (94582 inhabitants)
74 Km NW of Fano (60888 inhabitants)
78 Km E of Bologna (386663 inhabitants)
86 Km SE of Ferrara (133155 inhabitants)
86 Km NE of Arezzo (99543 inhabitants)
92 Km NE of Firenze (382808 inhabitants)
98 Km NE of Scandicci (50609 inhabitants)
98 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 1987-03-28
11:59:13
44.2 12.24 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 43739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-03-28 11:59:13 ± 0.66
Latitude 44.20 ± 0.01
Longitude 12.24 ± 0.02
Depth (km) 6 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 43739

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) 2279.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.02177
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 5
Type of magnitude Md
Reference to an origin 43739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1987-03-28T12:00:23.00 10.0 undecidable manual SN 21 0.0218 -0.02 0.8
--.FOI.Z. 1987-03-28T11:59:54.50 10.0 undecidable manual PN 8 0.0218 0.86 0.6
--.RBL.Z. 1987-03-28T11:59:53.00 10.0 undecidable manual PN 21 0.0218 -0.7 0.8
--.BDI.Z. 1987-03-28T11:59:53.50 10.0 undecidable manual SN 263 0.0106 0 0.8
--.CTI.Z. 1987-03-28T11:59:46.50 10.0 undecidable manual PN 347 0.017 0.14 1.6
--.ARV.Z. 1987-03-28T11:59:45.30 10.0 undecidable manual SG 143 0.0078 1.03 0.3
--.TRI.Z. 1987-03-28T11:59:45.00 10.0 undecidable manual PN 34 0.0167 -0.85 0.7
--.PS9.Z. 1987-03-28T11:59:39.00 10.0 undecidable manual PN 249 0.0119 0.45 1.5
--.BDI.Z. 1987-03-28T11:59:37.00 10.0 undecidable manual PN 263 0.0106 0.34 1.7
--.CRE.Z. 1987-03-28T11:59:35.50 10.0 undecidable manual SG 199 0.0055 -0.71 0.6
--.ARV.Z. 1987-03-28T11:59:31.50 10.0 undecidable manual PG 143 0.0078 0.17 1.9
--.MF9.Z. 1987-03-28T11:59:30.00 10.0 undecidable manual SG 219 0.0037 0.08 0.8
--.CRE.Z. 1987-03-28T11:59:25.50 10.0 undecidable manual PG 199 0.0055 -1.17 0.4
--.MF9.Z. 1987-03-28T11:59:23.50 10.0 undecidable manual PG 219 0.0037 0.46 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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