Earthquake with magnitude of Md 2.5 on date 12-10-1993 and time 03:38:01 (Italy) in region 1 km SW Forlì (FC)

A magnitude Md 2.5 earthquake occured in region: 1 km SW Forlì (FC), on

  • 12-10-1993 02:38:01 (UTC)
  • 12-10-1993 03:38:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.21, 12.04 at 20 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 1 117913 117913
Forlimpopoli FC 8 13290 131203
Castrocaro Terme e Terra del Sole FC 8 6426 137629
Meldola FC 10 9970 147599
Bertinoro FC 11 11059 158658
Predappio FC 13 6346 165004
Faenza RA 15 58541 223545
Dovadola FC 16 1653 225198
Russi RA 18 12247 237445
Cesena FC 19 96758 334203

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km SW of Forlì (117913 inhabitants)
15 Km SE of Faenza (58541 inhabitants)
19 Km W of Cesena (96758 inhabitants)
26 Km SW of Ravenna (159116 inhabitants)
30 Km SE of Imola (69797 inhabitants)
46 Km W of Rimini (147750 inhabitants)
63 Km E of Bologna (386663 inhabitants)
77 Km SE of Ferrara (133155 inhabitants)
78 Km W of Pesaro (94582 inhabitants)
79 Km NE of Firenze (382808 inhabitants)
84 Km E of Prato (191150 inhabitants)
84 Km N of Arezzo (99543 inhabitants)
85 Km NE of Scandicci (50609 inhabitants)
89 Km W of Fano (60888 inhabitants)
95 Km E of Pistoia (90315 inhabitants)
97 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 2.5 1993-10-12
02:38:01
44.21 12.04 20 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 197959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-10-12 02:38:01 ± 0.663
Latitude 44.21 ± 0.04
Longitude 12.04 ± 0.04
Depth (km) 20 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 197959

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) 4967
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 279
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.00866
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 197959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:06:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1993-10-12T02:38:33.72 10.0 undecidable manual SN 136 0.0087 0.3 0.5
--.CRE.Z. 1993-10-12T02:38:22.71 10.0 undecidable manual SG 185 0.0053 -0.38 0.6
--.ARV.Z. 1993-10-12T02:38:19.85 10.0 undecidable manual PN 136 0.0087 -0.18 1.4
--.SFI.Z. 1993-10-12T02:38:15.30 10.0 undecidable manual SG 203 0.003 -0.03 0.8
--.CRE.Z. 1993-10-12T02:38:14.37 10.0 undecidable manual PG 185 0.0053 0.29 1.8
--.SFI.Z. 1993-10-12T02:38:10.51 10.0 undecidable manual PG 203 0.003 1.07 0.4
--.RSM.Z. 1993-10-12T02:38:10.69 10.0 undecidable manual PG 133 0.0036 -0.08 1.9
--.PGD.Z. 1993-10-12T02:38:10.00 10.0 undecidable manual PG 213 0.0036 -0.64 0.7
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