Earthquake with magnitude of Md 2.2 on date 09-11-1987 and time 05:10:23 (Italy) in region 2 km NW Galeata (FC)

A magnitude Md 2.2 earthquake occured in region: 2 km NW Galeata (FC), on

  • 09-11-1987 04:10:23 (UTC)
  • 09-11-1987 05:10:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.01, 11.89 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
Galeata FC 2 2516 2516
Civitella di Romagna FC 4 3786 6302
Rocca San Casciano FC 7 1910 8212
Santa Sofia FC 7 4136 12348
Portico e San Benedetto FC 9 756 13104
Premilcuore FC 10 799 13903
Dovadola FC 12 1653 15556
Predappio FC 13 6346 21902
Tredozio FC 14 1212 23114
Modigliana FC 18 4560 27674
Bagno di Romagna FC 18 6026 33700
Meldola FC 19 9970 43670
Castrocaro Terme e Terra del Sole FC 19 6426 50096

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Forlì (117913 inhabitants)
31 Km S of Faenza (58541 inhabitants)
32 Km W of Cesena (96758 inhabitants)
41 Km SE of Imola (69797 inhabitants)
52 Km SW of Ravenna (159116 inhabitants)
55 Km W of Rimini (147750 inhabitants)
57 Km E of Firenze (382808 inhabitants)
60 Km N of Arezzo (99543 inhabitants)
63 Km E of Scandicci (50609 inhabitants)
65 Km E of Prato (191150 inhabitants)
69 Km SE of Bologna (386663 inhabitants)
78 Km E of Pistoia (90315 inhabitants)
83 Km W of Pesaro (94582 inhabitants)
89 Km NE of Siena (53903 inhabitants)
93 Km W of Fano (60888 inhabitants)
94 Km S 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 2.2
ML-VAX 1.5
1987-11-09
04:10:23
44.01 11.89 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 58339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-11-09 04:10:23 ± 0.441
Latitude 44.01 ± 0.03
Longitude 11.89 ± 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 58339

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) 3176.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 311
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00348
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 58339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:55:51

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 58339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1987-11-09T04:10:38.28 10.0 undecidable manual SG 173 0.0035 0.28 0.1
--.CRE.Z. 1987-11-09T04:10:31.75 10.0 undecidable manual PG 173 0.0035 -0.09 0.9
--.PGD.Z. 1987-11-09T04:10:31.28 10.0 undecidable manual SG 221 0.0016 0.11 0.5
--.SS9.Z. 1987-11-09T04:10:28.20 10.0 undecidable manual SG 196 0.0008 -0.42 0
--.PGD.Z. 1987-11-09T04:10:27.91 10.0 positive manual PG 221 0.0016 0.01 3.1
--.SS9.Z. 1987-11-09T04:10:26.42 10.0 undecidable manual PG 196 0.0008 0.09 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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