Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 26-03-2004 and time 21:31:07 (Italy) in region Costa Ravennate (Ravenna)

A magnitude Md 2.3 earthquake occured in region: Costa Ravennate (Ravenna), on

  • 26-03-2004 20:31:07 (UTC)
  • 26-03-2004 21:31:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2350, 12.3830 at 7 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cervia RA 4 28940 28940
Cesenatico FC 4 25796 54736
Bellaria-Igea Marina RN 11 19519 74255
Gambettola FC 13 10660 84915
Gatteo FC 14 9068 93983
San Mauro Pascoli FC 14 11690 105673
Cesena FC 16 96758 202431
Savignano sul Rubicone FC 16 17766 220197
Montiano FC 18 1716 221913
Longiano FC 18 7126 229039
Santarcangelo di Romagna RN 20 22089 251128

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Cesena (96758 inhabitants)
24 Km NW of Rimini (147750 inhabitants)
25 Km SE of Ravenna (159116 inhabitants)
27 Km E of Forlì (117913 inhabitants)
40 Km E of Faenza (58541 inhabitants)
55 Km E of Imola (69797 inhabitants)
56 Km NW of Pesaro (94582 inhabitants)
67 Km NW of Fano (60888 inhabitants)
88 Km E of Bologna (386663 inhabitants)
90 Km SE of Ferrara (133155 inhabitants)
94 Km NE of Arezzo (99543 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
Bulletin
Rev1000 		Md 2.3 2004-03-26
20:31:07		 44.235 12.383 7 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 495439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-03-26 20:31:07 ± 0.456
Latitude 44.2350 ± 0.0238
Longitude 12.3830 ± 0.0143
Depth (km) 7 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 495439

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) 2878.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 261
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00453
Epicentral distance of station farthest from the epicenter (degree) 0.01344
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 495439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:53:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SNTG.Z. 2004-03-26T20:31:43.99 10.0 undecidable manual SG 157 1.0545 -0.01 0.7
--.ARV.Z. 2004-03-26T20:31:36.93 10.0 undecidable manual SG 150 0.8325 -0.02 0.8
--.NRCA.Z. 2004-03-26T20:31:34.83 10.0 undecidable manual PN 158 1.4874 0.24 1.2
--.PII.Z. 2004-03-26T20:31:33.58 10.0 undecidable manual PN 249 1.4319 -0.11 1.4
--.CRE.Z. 2004-03-26T20:31:32.95 10.0 undecidable manual SG 206 0.6882 0.83 0.1
--.VMG.Z. 2004-03-26T20:31:31.17 10.0 undecidable manual SG 245 0.6549 -0.05 0.8
--.ASS.Z. 2004-03-26T20:31:30.65 10.0 undecidable manual PN 170 1.1877 0.3 1.2
--.FSSB.Z. 2004-03-26T20:31:29.54 10.0 undecidable manual SG 151 0.6105 -0.12 0.8
--.PGD.Z. 2004-03-26T20:31:28.39 10.0 undecidable manual SG 232 0.5883 -0.73 0.1
--.SNTG.Z. 2004-03-26T20:31:27.71 10.0 undecidable manual PG 157 1.0545 -0.86 0.2
--.SFI.Z. 2004-03-26T20:31:25.74 10.0 undecidable manual SG 229 0.4995 -0.53 0.3
--.ARV.Z. 2004-03-26T20:31:24.26 10.0 undecidable manual PG 150 0.8325 -0.24 1.6
--.CRE.Z. 2004-03-26T20:31:22.26 10.0 undecidable manual PG 206 0.6882 0.55 0.8
--.VMG.Z. 2004-03-26T20:31:21.32 10.0 undecidable manual PG 245 0.6549 0.13 1.9
--.FSSB.Z. 2004-03-26T20:31:20.62 10.0 undecidable manual PG 151 0.6105 0.33 1.4
--.PGD.Z. 2004-03-26T20:31:19.90 10.0 undecidable manual PG 232 0.5883 -0.09 1.9
--.SFI.Z. 2004-03-26T20:31:18.35 10.0 undecidable manual PG 229 0.4995 0.02 2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download