Earthquake with magnitude of Md 2.2 on date 03-04-1987 and time 00:56:50 (Italy) in region 1 km NW Bertinoro (FC)

A magnitude Md 2.2 earthquake occured in region: 1 km NW Bertinoro (FC), on

  • 02-04-1987 22:56:50 (UTC)
  • 03-04-1987 00:56:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 12.12 at 8 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 1 11059 11059
Forlimpopoli FC 3 13290 24349
Meldola FC 6 9970 34319
Forlì FC 10 117913 152232
Cesena FC 10 96758 248990
Predappio FC 13 6346 255336
Castrocaro Terme e Terra del Sole FC 14 6426 261762
Montiano FC 17 1716 263478
Gambettola FC 18 10660 274138
Longiano FC 19 7126 281264
Dovadola FC 19 1653 282917

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SE of Forlì (117913 inhabitants)
10 Km W of Cesena (96758 inhabitants)
24 Km SE of Faenza (58541 inhabitants)
30 Km S of Ravenna (159116 inhabitants)
37 Km W of Rimini (147750 inhabitants)
39 Km SE of Imola (69797 inhabitants)
69 Km W of Pesaro (94582 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
79 Km N of Arezzo (99543 inhabitants)
80 Km W of Fano (60888 inhabitants)
82 Km NE of Firenze (382808 inhabitants)
85 Km SE of Ferrara (133155 inhabitants)
87 Km NE of Scandicci (50609 inhabitants)
88 Km E of Prato (191150 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 2.2 1987-04-02
22:56:50
44.16 12.12 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 44109
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-02 22:56:50 ± 0.766
Latitude 44.16 ± 0.01
Longitude 12.12 ± 0.02
Depth (km) 8 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44109

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) 2304.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
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) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.02226
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 44109
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1987-04-02T22:57:45.91 10.0 undecidable manual SN 349 0.0172 -1.13 0.2
--.FO1.Z. 1987-04-02T22:57:31.62 10.0 undecidable manual PN 10 0.0223 0.8 0.6
--.CTI.Z. 1987-04-02T22:57:22.53 10.0 undecidable manual PN 349 0.0172 -0.59 1
--.ARV.Z. 1987-04-02T22:57:21.14 10.0 undecidable manual SG 137 0.0079 -0.01 0.9
--.PS9.Z. 1987-04-02T22:57:14.50 10.0 undecidable manual PN 249 0.011 0.83 0.9
--.ASS.Z. 1987-04-02T22:57:13.50 10.0 undecidable manual PN 160 0.0104 0.79 1
--.CRE.Z. 1987-04-02T22:57:10.50 10.0 undecidable manual SG 192 0.0049 0.09 0.9
--.ARV.Z. 1987-04-02T22:57:07.83 10.0 undecidable manual PG 137 0.0079 -0.34 1.9
--.PGD.Z. 1987-04-02T22:57:05.50 10.0 undecidable manual SG 225 0.0036 -0.14 0.9
--.SS9.Z. 1987-04-02T22:57:03.00 10.0 undecidable manual SG 219 0.0027 0.48 0.7
--.CRE.Z. 1987-04-02T22:57:01.00 10.0 undecidable manual PG 192 0.0049 -0.98 0.8
--.PGD.Z. 1987-04-02T22:56:58.50 10.0 undecidable manual PG 225 0.0036 -0.72 1.3
--.SS9.Z. 1987-04-02T22:56:57.80 10.0 undecidable manual PG 219 0.0027 0.38 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download