Earthquake with magnitude of Md 2.3 on date 22-08-1989 and time 23:18:42 (Italy) in region 6 km W Castrocaro Terme e Terra del Sole (FC)

A magnitude Md 2.3 earthquake occured in region: 6 km W Castrocaro Terme e Terra del Sole (FC), on

  • 22-08-1989 21:18:42 (UTC)
  • 22-08-1989 23:18:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.19, 11.88 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
Castrocaro Terme e Terra del Sole FC 6 6426 6426
Dovadola FC 7 1653 8079
Modigliana FC 8 4560 12639
Brisighella RA 10 7639 20278
Faenza RA 11 58541 78819
Predappio FC 12 6346 85165
Forlì FC 14 117913 203078
Rocca San Casciano FC 14 1910 204988
Riolo Terme RA 16 5720 210708
Meldola FC 16 9970 220678
Tredozio FC 16 1212 221890
Castel Bolognese RA 16 9554 231444
Portico e San Benedetto FC 20 756 232200
Solarolo RA 20 4488 236688
Forlimpopoli FC 20 13290 249978

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Faenza (58541 inhabitants)
14 Km W of Forlì (117913 inhabitants)
23 Km SE of Imola (69797 inhabitants)
30 Km W of Cesena (96758 inhabitants)
36 Km SW of Ravenna (159116 inhabitants)
55 Km SE of Bologna (386663 inhabitants)
57 Km W of Rimini (147750 inhabitants)
68 Km NE of Firenze (382808 inhabitants)
71 Km E of Prato (191150 inhabitants)
73 Km NE of Scandicci (50609 inhabitants)
75 Km S of Ferrara (133155 inhabitants)
80 Km N of Arezzo (99543 inhabitants)
82 Km E of Pistoia (90315 inhabitants)
88 Km W of Pesaro (94582 inhabitants)
91 Km SE of Modena (184973 inhabitants)
99 Km S of Rovigo (51867 inhabitants)
99 Km W of Fano (60888 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 2.3
ML-VAX 1.6
1989-08-22
21:18:42
44.19 11.88 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 98119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-08-22 21:18:42 ± 0.314
Latitude 44.19 ± 0.02
Longitude 11.88 ± 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 98119

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) 2708
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 220
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.00923
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 98119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:31:41

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 98119
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
--.ARV.Z. 1989-08-22T21:19:02.72 10.0 undecidable manual PN 131 0.0092 -0.23 1.3
--.BDI.Z. 1989-08-22T21:19:01.20 10.0 undecidable manual PG 262 0.0083 -0.06 1.6
--.MME.Z. 1989-08-22T21:18:59.35 10.0 undecidable manual PG 270 0.0076 -0.2 1.5
--.PGD.Z. 1989-08-22T21:18:55.00 10.0 undecidable manual SG 200 0.0029 -0.32 0.6
--.SFI.Z. 1989-08-22T21:18:53.00 10.0 undecidable manual SG 184 0.0025 -0.77 0.1
--.PGD.Z. 1989-08-22T21:18:50.52 10.0 undecidable manual PG 200 0.0029 0.51 0.9
--.SFI.Z. 1989-08-22T21:18:49.56 10.0 undecidable manual PG 184 0.0025 0.44 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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