Earthquake with magnitude of Md 2.1 on date 13-10-1989 and time 19:27:03 (Italy) in region 2 km SE Brisighella (RA)

A magnitude Md 2.1 earthquake occured in region: 2 km SE Brisighella (RA), on

  • 13-10-1989 18:27:03 (UTC)
  • 13-10-1989 19:27:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2, 11.78 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
Brisighella RA 3 7639 7639
Modigliana FC 5 4560 12199
Riolo Terme RA 10 5720 17919
Dovadola FC 12 1653 19572
Casola Valsenio RA 13 2617 22189
Faenza RA 13 58541 80730
Castel Bolognese RA 13 9554 90284
Tredozio FC 14 1212 91496
Castrocaro Terme e Terra del Sole FC 14 6426 97922
Rocca San Casciano FC 16 1910 99832
Casalfiumanese BO 17 3438 103270
Borgo Tossignano BO 17 3288 106558
Imola BO 18 69797 176355
Fontanelice BO 19 1943 178298
Solarolo RA 19 4488 182786
Marradi FI 19 3139 185925
Portico e San Benedetto FC 19 756 186681
Predappio FC 20 6346 193027

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Faenza (58541 inhabitants)
18 Km SE of Imola (69797 inhabitants)
21 Km W of Forlì (117913 inhabitants)
38 Km W of Cesena (96758 inhabitants)
41 Km SW of Ravenna (159116 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
64 Km NE of Firenze (382808 inhabitants)
65 Km W of Rimini (147750 inhabitants)
65 Km NE of Prato (191150 inhabitants)
69 Km NE of Scandicci (50609 inhabitants)
72 Km S of Ferrara (133155 inhabitants)
75 Km E of Pistoia (90315 inhabitants)
82 Km N of Arezzo (99543 inhabitants)
84 Km SE of Modena (184973 inhabitants)
96 Km SE of Carpi (70699 inhabitants)
96 Km W of Pesaro (94582 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 2.1
ML-VAX 2.0
1989-10-13
18:27:03
44.2 11.78 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 102129
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-10-13 18:27:03 ± 0.696
Latitude 44.20 ± 0.03
Longitude 11.78 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 102129

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) 5728.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 266
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.00769
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 102129
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:35:11

ML:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 102129
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
--.BDI.Z. 1989-10-13T18:27:32.11 10.0 undecidable manual SG 261 0.0077 -1.03 0
--.CRE.Z. 1989-10-13T18:27:25.50 10.0 undecidable manual SG 167 0.0053 0.86 0.1
--.BDI.Z. 1989-10-13T18:27:21.39 10.0 undecidable manual PG 261 0.0077 0.71 0.4
--.PGD.Z. 1989-10-13T18:27:16.25 10.0 undecidable manual SG 187 0.0029 0.14 0.7
--.CRE.Z. 1989-10-13T18:27:15.50 10.0 undecidable manual PG 167 0.0053 -0.27 1.3
--.SFI.Z. 1989-10-13T18:27:15.20 10.0 undecidable manual SG 170 0.0027 -0.02 0.7
--.PGD.Z. 1989-10-13T18:27:10.74 10.0 undecidable manual PG 187 0.0029 -0.1 1.7
--.SFI.Z. 1989-10-13T18:27:10.13 10.0 positive manual PG 170 0.0027 -0.2 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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