Earthquake with magnitude of Md 2.2 on date 23-03-1989 and time 18:54:02 (Italy) in region 3 km E Rocca San Casciano (FC)

A magnitude Md 2.2 earthquake occured in region: 3 km E Rocca San Casciano (FC), on

  • 23-03-1989 17:54:02 (UTC)
  • 23-03-1989 18:54:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.07, 11.88 at 14 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
Rocca San Casciano FC 3 1910 1910
Dovadola FC 6 1653 3563
Civitella di Romagna FC 8 3786 7349
Galeata FC 8 2516 9865
Portico e San Benedetto FC 9 756 10621
Predappio FC 9 6346 16967
Tredozio FC 11 1212 18179
Modigliana FC 12 4560 22739
Premilcuore FC 13 799 23538
Santa Sofia FC 14 4136 27674
Castrocaro Terme e Terra del Sole FC 14 6426 34100
Meldola FC 16 9970 44070
Brisighella RA 19 7639 51709

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Forlì (117913 inhabitants)
24 Km S of Faenza (58541 inhabitants)
30 Km W of Cesena (96758 inhabitants)
35 Km SE of Imola (69797 inhabitants)
47 Km SW of Ravenna (159116 inhabitants)
55 Km W of Rimini (147750 inhabitants)
60 Km NE of Firenze (382808 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
66 Km NE of Scandicci (50609 inhabitants)
66 Km E of Prato (191150 inhabitants)
67 Km N of Arezzo (99543 inhabitants)
78 Km E of Pistoia (90315 inhabitants)
85 Km W of Pesaro (94582 inhabitants)
88 Km S of Ferrara (133155 inhabitants)
94 Km NE of Siena (53903 inhabitants)
95 Km W of Fano (60888 inhabitants)
99 Km SE of Modena (184973 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 2.2
ML-VAX 1.8
1989-03-23
17:54:02
44.07 11.88 14 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 88839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-03-23 17:54:02 ± 0.408
Latitude 44.07 ± 0.03
Longitude 11.88 ± 0.03
Depth (km) 14 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 88839

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) 4429.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.01781
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 88839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:23:21

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 88839
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
--.PII.Z. 1989-03-23T17:54:36.70 10.0 undecidable manual SN 250 0.0093 0.4 0.4
--.CTI.Z. 1989-03-23T17:54:35.67 10.0 undecidable manual PN 355 0.0178 0.78 0.3
--.BDI.Z. 1989-03-23T17:54:34.25 10.0 undecidable manual SG 270 0.0083 0.69 0.3
--.PII.Z. 1989-03-23T17:54:21.00 10.0 undecidable manual PN 250 0.0093 -0.83 0.5
--.BDI.Z. 1989-03-23T17:54:19.75 10.0 undecidable manual PG 270 0.0083 -0.5 1
--.RSM.Z. 1989-03-23T17:54:19.80 10.0 undecidable manual SG 108 0.0039 1.07 0.1
--.PGD.Z. 1989-03-23T17:54:11.98 10.0 undecidable manual SG 210 0.0019 0.61 0.4
--.RSM.Z. 1989-03-23T17:54:10.42 10.0 undecidable manual PG 108 0.0039 -0.85 0.6
--.SFI.Z. 1989-03-23T17:54:10.00 10.0 undecidable manual SG 187 0.0015 0.32 0.6
--.PGD.Z. 1989-03-23T17:54:07.43 10.0 positive manual PG 210 0.0019 -0.01 3.4
--.SFI.Z. 1989-03-23T17:54:06.38 10.0 negative manual PG 187 0.0015 -0.08 3.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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