Earthquake with magnitude of Md 2.8 on date 17-03-1987 and time 16:36:24 (Italy) in region 2 km SE Forlimpopoli (FC)

A magnitude Md 2.8 earthquake occured in region: 2 km SE Forlimpopoli (FC), on

  • 17-03-1987 15:36:24 (UTC)
  • 17-03-1987 16:36:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.17, 12.15 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
Forlimpopoli FC 2 13290 13290
Bertinoro FC 3 11059 24349
Meldola FC 9 9970 34319
Cesena FC 9 96758 131077
Forlì FC 10 117913 248990
Predappio FC 15 6346 255336
Castrocaro Terme e Terra del Sole FC 16 6426 261762
Montiano FC 16 1716 263478
Gambettola FC 16 10660 274138
Longiano FC 18 7126 281264
Cervia RA 19 28940 310204
Roncofreddo FC 20 3386 313590

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Cesena (96758 inhabitants)
10 Km SE of Forlì (117913 inhabitants)
25 Km SE of Faenza (58541 inhabitants)
28 Km S of Ravenna (159116 inhabitants)
36 Km W of Rimini (147750 inhabitants)
40 Km SE of Imola (69797 inhabitants)
68 Km W of Pesaro (94582 inhabitants)
73 Km E of Bologna (386663 inhabitants)
79 Km W of Fano (60888 inhabitants)
81 Km N of Arezzo (99543 inhabitants)
84 Km NE of Firenze (382808 inhabitants)
85 Km SE of Ferrara (133155 inhabitants)
90 Km NE 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 2.8 1987-03-17
15:36:24
44.17 12.15 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 43069
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-03-17 15:36:24 ± 0.144
Latitude 44.17 ± 0.01
Longitude 12.15 ± 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 43069

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) 1654.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.00316
Epicentral distance of station farthest from the epicenter (degree) 0.031
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 43069
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:42:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1987-03-17T15:37:35.00 10.0 undecidable manual SN 23 0.0223 -0.59 0.4
--.CTI.Z. 1987-03-17T15:37:22.00 10.0 undecidable manual SN 349 0.0172 -0.03 1.1
--.STV.Z. 1987-03-17T15:37:20.00 10.0 undecidable manual PN 272 0.031 0.94 0.4
--.ORO.Z. 1987-03-17T15:37:16.00 10.0 undecidable manual PN 297 0.0295 -0.82 0.5
--.VAI.Z. 1987-03-17T15:37:12.00 10.0 undecidable manual PN 306 0.0263 0.16 1.4
--.FIN.Z. 1987-03-17T15:37:10.70 10.0 undecidable manual PN 271 0.0253 0.27 1.3
--.PS9.Z. 1987-03-17T15:37:07.20 10.0 undecidable manual SN 249 0.0113 0.74 0.4
--.RBL.Z. 1987-03-17T15:37:06.50 10.0 undecidable manual PN 23 0.0223 0.82 0.7
--.FOI.Z. 1987-03-17T15:37:05.50 10.0 undecidable manual PN 9 0.0221 0.04 1.6
--.ASS.Z. 1987-03-17T15:37:05.50 10.0 undecidable manual SN 161 0.0104 1.07 0.2
--.BDI.Z. 1987-03-17T15:37:04.50 10.0 undecidable manual SN 264 0.01 1.23 0.1
--.MDI.Z. 1987-03-17T15:37:03.50 10.0 undecidable manual PN 313 0.0211 -0.49 1.2
--.ARV.Z. 1987-03-17T15:36:57.00 10.0 undecidable manual SG 139 0.0079 0.93 0.4
--.CTI.Z. 1987-03-17T15:36:57.50 10.0 undecidable manual PN 349 0.0172 -0.36 1.6
--.FIR.Z. 1987-03-17T15:36:52.00 10.0 undecidable manual SG 238 0.0068 0.04 0.8
--.PS9.Z. 1987-03-17T15:36:48.30 10.0 undecidable manual PN 249 0.0113 -0.57 1.3
--.AM8.Z. 1987-03-17T15:36:48.44 10.0 undecidable manual PN 120 0.0109 0.05 2
--.BDI.Z. 1987-03-17T15:36:47.50 10.0 undecidable manual PN 264 0.01 0.48 1.5
--.ASS.Z. 1987-03-17T15:36:47.50 10.0 undecidable manual PN 161 0.0104 -0.19 2
--.CRE.Z. 1987-03-17T15:36:45.00 10.0 undecidable manual SG 194 0.0051 -0.99 0.3
--.ARV.Z. 1987-03-17T15:36:42.50 10.0 undecidable manual PG 139 0.0079 -0.37 1.7
--.FIR.Z. 1987-03-17T15:36:40.00 10.0 undecidable manual PG 238 0.0068 -0.49 1.5
--.MF9.Z. 1987-03-17T15:36:39.00 10.0 undecidable manual SG 214 0.0032 0.23 0.8
--.CRE.Z. 1987-03-17T15:36:36.00 10.0 undecidable manual PG 194 0.0051 -1.05 0.5
--.MF9.Z. 1987-03-17T15:36:33.50 10.0 undecidable manual PG 214 0.0032 0.62 1.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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