Earthquake with magnitude of Md 3.0 on date 04-11-1990 and time 08:31:16 (Italy) in region 9 km SW Marradi (FI)

A magnitude Md 3.0 earthquake occured in region: 9 km SW Marradi (FI), on

  • 04-11-1990 07:31:16 (UTC)
  • 04-11-1990 08:31:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.02, 11.53 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
Marradi FI 9 3139 3139
Palazzuolo sul Senio FI 10 1154 4293
Vicchio FI 11 8044 12337
San Godenzo FI 13 1167 13504
Borgo San Lorenzo FI 14 18211 31715
Dicomano FI 15 5515 37230
Firenzuola FI 16 4726 41956
Scarperia e San Piero FI 18 12217 54173
Tredozio FC 18 1212 55385
Londa FI 19 1840 57225

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NE of Firenze (382808 inhabitants)
38 Km E of Prato (191150 inhabitants)
39 Km SW of Imola (69797 inhabitants)
40 Km SW of Faenza (58541 inhabitants)
41 Km NE of Scandicci (50609 inhabitants)
46 Km W of Forlì (117913 inhabitants)
50 Km E of Pistoia (90315 inhabitants)
54 Km S of Bologna (386663 inhabitants)
58 Km W of Cesena (96758 inhabitants)
68 Km NW of Arezzo (99543 inhabitants)
69 Km SW of Ravenna (159116 inhabitants)
80 Km N of Siena (53903 inhabitants)
83 Km W of Rimini (147750 inhabitants)
84 Km SE of Modena (184973 inhabitants)
85 Km E of Lucca (89046 inhabitants)
91 Km S of Ferrara (133155 inhabitants)
97 Km E of Pisa (89158 inhabitants)
99 Km SE of Carpi (70699 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 3.0
ML-VAX 2.3
1990-11-04
07:31:16
44.03 11.53 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 129869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-11-04 07:31:16 ± 0.303
Latitude 44.03 ± 0.02
Longitude 11.53 ± 0.02
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 129869

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) 2682.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
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) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.02437
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 129869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:00:44

ML:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 129869
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
--.CTI.Z. 1990-11-04T07:32:14.00 10.0 undecidable manual SN 2 0.0182 -0.94 0.2
--.FVI.Z. 1990-11-04T07:31:58.86 10.0 undecidable manual PN 18 0.0244 -0.74 0.5
--.ASS.Z. 1990-11-04T07:31:55.18 10.0 undecidable manual SN 139 0.0113 -1.55 0
--.MDI.Z. 1990-11-04T07:31:53.00 10.0 undecidable manual PN 324 0.0195 0.8 0.5
--.ARV.Z. 1990-11-04T07:31:53.59 10.0 undecidable manual SN 116 0.0103 -0.49 0.5
--.CTI.Z. 1990-11-04T07:31:50.60 10.0 undecidable manual PN 2 0.0182 0.47 0.9
--.BOB.Z. 1990-11-04T07:31:45.45 10.0 undecidable manual PN 297 0.0149 0.27 1.2
--.PII.Z. 1990-11-04T07:31:42.94 10.0 undecidable manual SG 247 0.007 -0.55 0.5
--.ASS.Z. 1990-11-04T07:31:40.95 10.0 undecidable manual PN 139 0.0113 1.33 0.2
--.BDI.Z. 1990-11-04T07:31:40.72 10.0 undecidable manual SG 273 0.006 0.9 0.3
--.MME.Z. 1990-11-04T07:31:39.80 10.0 undecidable manual SG 286 0.0056 0.93 0.2
--.ARV.Z. 1990-11-04T07:31:38.37 10.0 undecidable manual PN 116 0.0103 0.29 1.4
--.CRE.Z. 1990-11-04T07:31:34.75 10.0 undecidable manual SG 143 0.0045 0.33 0.6
--.PII.Z. 1990-11-04T07:31:31.78 10.0 undecidable manual PG 247 0.007 -0.19 1.7
--.BDI.Z. 1990-11-04T07:31:28.64 10.0 undecidable manual PG 273 0.006 -1.21 0.3
--.MME.Z. 1990-11-04T07:31:28.79 10.0 undecidable manual PG 286 0.0056 -0.09 1.7
--.SFI.Z. 1990-11-04T07:31:27.32 10.0 undecidable manual SG 117 0.0023 0.86 0.3
--.SR3.E. 1990-11-04T07:31:27.20 10.0 undecidable manual SG 123 0.0023 0.61 0.4
--.CRE.Z. 1990-11-04T07:31:26.74 10.0 undecidable manual PG 143 0.0045 0.01 1.7
--.PGD.Z. 1990-11-04T07:31:24.13 10.0 undecidable manual SG 137 0.0018 -0.55 0.5
--.SR3.Z. 1990-11-04T07:31:22.00 10.0 negative manual PG 123 0.0023 -0.21 3.3
--.PGD.Z. 1990-11-04T07:31:21.31 10.0 positive manual PG 137 0.0018 0.2 3.3
--.SFI.Z. 1990-11-04T07:31:21.77 10.0 positive manual PG 117 0.0023 -0.37 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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