Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 25-08-2004 and time 10:59:16 (UTC) in region 2 km NE Meldola (FC)

A magnitude Md 2.1 earthquake occured in region: 2 km NE Meldola (FC), on

  • 25-08-2004 10:59:16 (UTC)
  • 25-08-2004 12:59:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1390, 12.0870 at 5 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
Meldola FC 2 9970 9970
Bertinoro FC 4 11059 21029
Forlimpopoli FC 6 13290 34319
Predappio FC 9 6346 40665
Forlì FC 10 117913 158578
Castrocaro Terme e Terra del Sole FC 12 6426 165004
Cesena FC 13 96758 261762
Dovadola FC 16 1653 263415
Montiano FC 18 1716 265131
Civitella di Romagna FC 19 3786 268917

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SE of Forlì (117913 inhabitants)
13 Km W of Cesena (96758 inhabitants)
23 Km SE of Faenza (58541 inhabitants)
32 Km S of Ravenna (159116 inhabitants)
38 Km SE of Imola (69797 inhabitants)
39 Km W of Rimini (147750 inhabitants)
71 Km W of Pesaro (94582 inhabitants)
71 Km SE of Bologna (386663 inhabitants)
76 Km N of Arezzo (99543 inhabitants)
78 Km NE of Firenze (382808 inhabitants)
82 Km W of Fano (60888 inhabitants)
84 Km NE of Scandicci (50609 inhabitants)
84 Km E of Prato (191150 inhabitants)
86 Km SE of Ferrara (133155 inhabitants)
96 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
Bulletin
Rev1000 		Md 2.1
ML-VAX 1.5 		2004-08-25
10:59:16		 44.139 12.087 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 503689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-08-25 10:59:16 ± 0.478
Latitude 44.1390 ± 0.0265
Longitude 12.0870 ± 0.0176
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 503689

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) 3268.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 222
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.00963
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 503689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 01:01:51

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 503689
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(km) Takeoff_angle Residual Weight
--.BDI.Z. 2004-08-25T10:59:38.38 10.0 undecidable manual PG 266 1.0656 0.48 1
--.SEI.Z. 2004-08-25T10:59:37.62 10.0 undecidable manual SG 260 0.5217 1.38 0.1
--.CRE.Z. 2004-08-25T10:59:35.66 10.0 undecidable manual SG 190 0.5217 -0.52 0.6
--.CSNT.Z. 2004-08-25T10:59:35.46 10.0 undecidable manual PG 220 0.8769 1.14 0.4
--.VMG.Z. 2004-08-25T10:59:33.46 10.0 undecidable manual SG 245 0.4218 0.5 0.6
--.FSSB.Z. 2004-08-25T10:59:31.34 10.0 undecidable manual PG 131 0.666 0.93 0.8
--.PGD.Z. 2004-08-25T10:59:31.50 10.0 undecidable manual SG 224 0.3663 0.7 0.5
--.RSM.Z. 2004-08-25T10:59:29.88 10.0 undecidable manual SG 128 0.333 0.47 0.6
--.SFI.Z. 2004-08-25T10:59:28.41 10.0 undecidable manual SG 216 0.2886 0.71 0.5
--.SEI.Z. 2004-08-25T10:59:27.50 10.0 undecidable manual PG 260 0.5217 -0.8 1.1
--.CRE.Z. 2004-08-25T10:59:26.83 10.0 undecidable manual PG 190 0.5217 -0.98 0.8
--.VMG.Z. 2004-08-25T10:59:25.12 10.0 undecidable manual PG 245 0.4218 -0.83 1
--.PGD.Z. 2004-08-25T10:59:24.16 10.0 undecidable manual PG 224 0.3663 -0.54 1.5
--.RSM.Z. 2004-08-25T10:59:23.51 10.0 undecidable manual PG 128 0.333 -0.39 1.7
--.SFI.Z. 2004-08-25T10:59:22.69 10.0 negative manual PG 216 0.2886 -0.22 3.7
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