Earthquake with magnitude of Md 2.6 on date 04-08-1990 and time 16:58:39 (Italy) in region 4 km SW Modigliana (FC)

A magnitude Md 2.6 earthquake occured in region: 4 km SW Modigliana (FC), on

  • 04-08-1990 14:58:39 (UTC)
  • 04-08-1990 16:58:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.12, 11.76 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Modigliana FC 5 4560 4560
Tredozio FC 5 1212 5772
Rocca San Casciano FC 9 1910 7682
Dovadola FC 10 1653 9335
Portico e San Benedetto FC 11 756 10091
Brisighella RA 11 7639 17730
Marradi FI 13 3139 20869
Casola Valsenio RA 16 2617 23486
Castrocaro Terme e Terra del Sole FC 16 6426 29912
Premilcuore FC 16 799 30711
Palazzuolo sul Senio FI 17 1154 31865
Riolo Terme RA 17 5720 37585
Predappio FC 18 6346 43931
Galeata FC 19 2516 46447
Civitella di Romagna FC 19 3786 50233

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Faenza (58541 inhabitants)
25 Km W of Forlì (117913 inhabitants)
26 Km S of Imola (69797 inhabitants)
38 Km W of Cesena (96758 inhabitants)
48 Km SW of Ravenna (159116 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
56 Km NE of Firenze (382808 inhabitants)
60 Km E of Prato (191150 inhabitants)
62 Km NE of Scandicci (50609 inhabitants)
65 Km W of Rimini (147750 inhabitants)
71 Km E of Pistoia (90315 inhabitants)
74 Km N of Arezzo (99543 inhabitants)
80 Km S of Ferrara (133155 inhabitants)
88 Km SE of Modena (184973 inhabitants)
95 Km W of Pesaro (94582 inhabitants)
96 Km NE of Siena (53903 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 2.6
ML-VAX 2.2
1990-08-04
14:58:39
44.12 11.76 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 124299
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-08-04 14:58:39 ± 0.543
Latitude 44.12 ± 0.03
Longitude 11.76 ± 0.03
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 124299

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) 3738.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.02307
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 124299
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:55:30

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 124299
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
--.CIO.Z. 1990-08-04T14:59:24.20 10.0 undecidable manual SN 132 0.0122 0.18 0.5
--.ASS.Z. 1990-08-04T14:59:22.59 10.0 undecidable manual SN 148 0.0112 1.49 0.1
--.FVI.Z. 1990-08-04T14:59:22.50 10.0 undecidable manual PN 15 0.0231 0.6 0.6
--.TRI.Z. 1990-08-04T14:59:17.00 10.0 undecidable manual PN 41 0.0191 1.2 0.3
--.PII.Z. 1990-08-04T14:59:14.16 10.0 undecidable manual SG 246 0.0087 0.13 0.6
--.ALP.Z. 1990-08-04T14:59:10.70 10.0 undecidable manual PN 135 0.0168 -1.67 0.1
--.CIO.Z. 1990-08-04T14:59:04.00 10.0 undecidable manual PN 132 0.0122 -1.35 0.3
--.ASS.Z. 1990-08-04T14:59:03.85 10.0 undecidable manual PN 148 0.0112 0.19 1.3
--.CRE.Z. 1990-08-04T14:59:00.47 10.0 undecidable manual SG 164 0.0047 1.07 0.2
--.PII.Z. 1990-08-04T14:58:59.00 10.0 undecidable manual PG 246 0.0087 -0.58 1.2
--.MME.Z. 1990-08-04T14:58:55.79 10.0 undecidable manual PG 275 0.0068 0.17 1.5
--.SR3.Z. 1990-08-04T14:58:51.00 10.0 undecidable manual SG 167 0.0022 1.42 0.2
--.PGD.Z. 1990-08-04T14:58:50.50 10.0 undecidable manual SG 186 0.0022 0.85 0.4
--.CRE.Z. 1990-08-04T14:58:50.50 10.0 undecidable manual PG 164 0.0047 -0.63 1.2
--.SFI.Z. 1990-08-04T14:58:49.00 10.0 undecidable manual SG 164 0.002 0.18 0.6
--.SR3.Z. 1990-08-04T14:58:45.00 10.0 positive manual PG 167 0.0022 -0.46 2.6
--.SFI.Z. 1990-08-04T14:58:45.10 10.0 negative manual PG 164 0.002 -0.01 3.2
--.PGD.Z. 1990-08-04T14:58:45.78 10.0 negative manual PG 186 0.0022 0.28 3
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