Earthquake with magnitude of Md 2.8 on date 04-11-1989 and time 04:16:20 (Italy) in region 3 km S Forlì (FC)

A magnitude Md 2.8 earthquake occured in region: 3 km S Forlì (FC), on

  • 04-11-1989 03:16:20 (UTC)
  • 04-11-1989 04:16:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2, 12.04 at 2 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
Forlì FC 3 117913 117913
Castrocaro Terme e Terra del Sole FC 7 6426 124339
Forlimpopoli FC 7 13290 137629
Meldola FC 8 9970 147599
Bertinoro FC 10 11059 158658
Predappio FC 12 6346 165004
Dovadola FC 15 1653 166657
Faenza RA 16 58541 225198
Cesena FC 18 96758 321956
Russi RA 20 12247 334203
Modigliana FC 20 4560 338763

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km S of Forlì (117913 inhabitants)
16 Km SE of Faenza (58541 inhabitants)
18 Km W of Cesena (96758 inhabitants)
28 Km SW of Ravenna (159116 inhabitants)
31 Km SE of Imola (69797 inhabitants)
45 Km W of Rimini (147750 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
77 Km W of Pesaro (94582 inhabitants)
78 Km SE of Ferrara (133155 inhabitants)
79 Km NE of Firenze (382808 inhabitants)
82 Km N of Arezzo (99543 inhabitants)
83 Km E of Prato (191150 inhabitants)
84 Km NE of Scandicci (50609 inhabitants)
88 Km W of Fano (60888 inhabitants)
94 Km E of Pistoia (90315 inhabitants)
99 Km S of Rovigo (51867 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 1989-11-04
03:16:20
44.2 12.04 2 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 103659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-11-04 03:16:20 ± 0.509
Latitude 44.20 ± 0.03
Longitude 12.04 ± 0.02
Depth (km) 2 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 103659

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) 3391
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01166
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 103659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:36:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM8.Z. 1989-11-04T03:17:04.56 10.0 undecidable manual SN 119 0.0117 0.4 0.5
--.CM8.Z. 1989-11-04T03:17:04.00 10.0 undecidable manual SN 140 0.0115 0.25 0.6
--.BDI.Z. 1989-11-04T03:16:58.41 10.0 undecidable manual SG 262 0.0093 0.96 0.3
--.PRO.Z. 1989-11-04T03:16:46.30 10.0 undecidable manual SG 114 0.006 0.81 0.6
--.AM8.Z. 1989-11-04T03:16:45.75 10.0 undecidable manual PN 119 0.0117 0.02 1.6
--.CM8.Z. 1989-11-04T03:16:44.81 10.0 undecidable manual PN 140 0.0115 -0.68 1
--.CRE.Z. 1989-11-04T03:16:42.00 10.0 undecidable manual SG 185 0.0052 -0.68 0.5
--.BDI.Z. 1989-11-04T03:16:41.24 10.0 undecidable manual PG 262 0.0093 -0.62 1.2
--.FIR.Z. 1989-11-04T03:16:38.50 10.0 undecidable manual PG! 233 0.0063 2.9 0
--.PRO.Z. 1989-11-04T03:16:35.50 10.0 negative manual PG 114 0.006 0.55 3.1
--.RSM.Z. 1989-11-04T03:16:35.17 10.0 undecidable manual SG 131 0.0036 -0.86 0.4
--.SFI.Z. 1989-11-04T03:16:34.49 10.0 undecidable manual SG 204 0.0028 1.45 0.1
--.CRE.Z. 1989-11-04T03:16:32.22 10.0 undecidable manual PG 185 0.0052 -1.11 0.6
--.RSM.Z. 1989-11-04T03:16:29.20 10.0 undecidable manual PG 131 0.0036 -0.47 1.7
--.PGD.Z. 1989-11-04T03:16:29.50 10.0 undecidable manual PG 215 0.0035 0.17 2.1
--.SFI.Z. 1989-11-04T03:16:28.28 10.0 undecidable manual PG 204 0.0028 0.52 1.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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