Earthquake with magnitude of Md 2.3 on date 02-04-1987 and time 21:05:13 (UTC) in region 1 km W Bertinoro (FC)

A magnitude Md 2.3 earthquake occured in region: 1 km W Bertinoro (FC), on

  • 02-04-1987 21:05:13 (UTC)
  • 02-04-1987 23:05:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.144, 12.12 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 1 11059 11059
Forlimpopoli FC 5 13290 24349
Meldola FC 5 9970 34319
Cesena FC 10 96758 131077
Forlì FC 11 117913 248990
Predappio FC 12 6346 255336
Castrocaro Terme e Terra del Sole FC 14 6426 261762
Montiano FC 16 1716 263478
Gambettola FC 18 10660 274138
Longiano FC 18 7126 281264
Dovadola FC 19 1653 282917
Roncofreddo FC 20 3386 286303

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km W of Cesena (96758 inhabitants)
11 Km SE of Forlì (117913 inhabitants)
25 Km SE of Faenza (58541 inhabitants)
31 Km S of Ravenna (159116 inhabitants)
37 Km W of Rimini (147750 inhabitants)
40 Km SE of Imola (69797 inhabitants)
69 Km W of Pesaro (94582 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
78 Km N of Arezzo (99543 inhabitants)
79 Km W of Fano (60888 inhabitants)
81 Km NE of Firenze (382808 inhabitants)
86 Km E of Scandicci (50609 inhabitants)
87 Km SE of Ferrara (133155 inhabitants)
87 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
Bulletin
Rev1000
Md 2.3 1987-04-02
21:05:13
44.144 12.12 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 44089
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-02 21:05:13 ± 0.65
Latitude 44.1440 ± 0.0363
Longitude 12.1200 ± 0.0210
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44089

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) 4368.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 270
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.00785
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 44089
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-04-02T21:05:44.00 10.0 undecidable manual SG 136 0.0079 0.13 0.6
--.CRE.Z. 1987-04-02T21:05:33.50 10.0 undecidable manual SG 192 0.0048 0.52 0.5
--.ARV.Z. 1987-04-02T21:05:31.00 10.0 undecidable manual PG 136 0.0079 -0.16 1.5
--.PGD.Z. 1987-04-02T21:05:27.90 10.0 undecidable manual SG 226 0.0035 -1.23 0
--.SS9.Z. 1987-04-02T21:05:25.50 10.0 undecidable manual SG 220 0.0026 0.33 0.7
--.CRE.Z. 1987-04-02T21:05:24.50 10.0 undecidable manual PG 192 0.0048 -0.38 1.5
--.PGD.Z. 1987-04-02T21:05:22.29 10.0 undecidable manual PG 226 0.0035 0.1 2.1
--.SS9.Z. 1987-04-02T21:05:20.90 10.0 undecidable manual PG 220 0.0026 0.52 1.1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download