Earthquake with magnitude of Md 2.3 on date 04-11-1989 and time 04:37:05 (Italy) in region 3 km E Forlì (FC)

A magnitude Md 2.3 earthquake occured in region: 3 km E Forlì (FC), on

  • 04-11-1989 03:37:05 (UTC)
  • 04-11-1989 04:37:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.24, 12.08 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
Forlì FC 3 117913 117913
Forlimpopoli FC 7 13290 131203
Bertinoro FC 11 11059 142262
Castrocaro Terme e Terra del Sole FC 12 6426 148688
Meldola FC 12 9970 158658
Russi RA 15 12247 170905
Faenza RA 16 58541 229446
Predappio FC 17 6346 235792
Cesena FC 17 96758 332550
Cotignola RA 20 7474 340024
Dovadola FC 20 1653 341677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km E of Forlì (117913 inhabitants)
16 Km E of Faenza (58541 inhabitants)
17 Km NW of Cesena (96758 inhabitants)
22 Km SW of Ravenna (159116 inhabitants)
32 Km E of Imola (69797 inhabitants)
44 Km W of Rimini (147750 inhabitants)
65 Km E of Bologna (386663 inhabitants)
76 Km SE of Ferrara (133155 inhabitants)
76 Km W of Pesaro (94582 inhabitants)
84 Km NE of Firenze (382808 inhabitants)
87 Km NW of Fano (60888 inhabitants)
87 Km N of Arezzo (99543 inhabitants)
88 Km E of Prato (191150 inhabitants)
89 Km NE of Scandicci (50609 inhabitants)
95 Km S of Rovigo (51867 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 2.3
ML-VAX 1.9
1989-11-04
03:37:05
44.24 12.08 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 103669
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-11-04 03:37:05 ± 0.402
Latitude 44.24 ± 0.02
Longitude 12.08 ± 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 103669

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) 2839.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 283
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.00559
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 103669
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:36:35

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 103669
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. 1989-11-04T03:37:27.35 10.0 undecidable manual SG 188 0.0056 -0.3 0.3
--.PGD.Z. 1989-11-04T03:37:22.30 10.0 undecidable manual SG 215 0.004 0.45 0.1
--.RSM.Z. 1989-11-04T03:37:21.80 10.0 undecidable manual SG 138 0.0036 0.39 0.2
--.SFI.Z. 1989-11-04T03:37:19.60 10.0 undecidable manual SG 206 0.0033 0.05 0.6
--.CRE.Z. 1989-11-04T03:37:17.89 10.0 undecidable manual PG 188 0.0056 -0.46 0.3
--.PGD.Z. 1989-11-04T03:37:15.16 10.0 negative manual PG 215 0.004 0.16 2.3
--.RSM.Z. 1989-11-04T03:37:14.36 10.0 undecidable manual PG 138 0.0036 0.03 1.5
--.SFI.Z. 1989-11-04T03:37:13.55 10.0 negative manual PG 206 0.0033 -0.12 2.8
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