Earthquake with magnitude of Md 2.4 on date 13-04-1985 and time 13:22:40 (Italy) in region 3 km NW Riolunato (MO)

A magnitude Md 2.4 earthquake occured in region: 3 km NW Riolunato (MO), on

  • 13-04-1985 11:22:40 (UTC)
  • 13-04-1985 13:22:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.26, 10.63 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
Riolunato MO 4 712 712
Pievepelago MO 6 2222 2934
Frassinoro MO 6 1926 4860
Palagano MO 7 2194 7054
Montecreto MO 7 940 7994
Fiumalbo MO 9 1280 9274
Lama Mocogno MO 10 2734 12008
Montefiorino MO 11 2203 14211
Sestola MO 12 2508 16719
Polinago MO 12 1672 18391
Abetone PT 13 621 19012
Fanano MO 14 2989 22001
Toano RE 14 4463 26464
Villa Minozzo RE 18 3750 30214
Pavullo nel Frignano MO 18 17383 47597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Pistoia (90315 inhabitants)
46 Km NE of Massa (69479 inhabitants)
47 Km E of Carrara (63133 inhabitants)
47 Km N of Lucca (89046 inhabitants)
49 Km S of Reggio nell'Emilia (171345 inhabitants)
49 Km SW of Modena (184973 inhabitants)
53 Km NE of Viareggio (62467 inhabitants)
56 Km NW of Prato (191150 inhabitants)
62 Km SW of Carpi (70699 inhabitants)
62 Km W of Bologna (386663 inhabitants)
63 Km NE of Pisa (89158 inhabitants)
65 Km SE of Parma (192836 inhabitants)
66 Km E of La Spezia (93959 inhabitants)
71 Km NW of Scandicci (50609 inhabitants)
74 Km NW of Firenze (382808 inhabitants)
83 Km NE of Livorno (159219 inhabitants)
87 Km W of Imola (69797 inhabitants)
100 Km W of Faenza (58541 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 2.4 1985-04-13
11:22:40
44.26 10.63 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4579
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-13 11:22:40 ± 0.357
Latitude 44.26 ± 0.02
Longitude 10.63 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4579

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) 4546.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.02857
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 4579
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FRF.Z. 1985-04-13T11:24:03.10 10.0 undecidable manual SN 257 0.0266 1.77 0.2
--.STV.Z. 1985-04-13T11:23:49.00 10.0 undecidable manual SN 270 0.0212 1.68 0.2
--.CTI.Z. 1985-04-13T11:23:35.50 10.0 undecidable manual SN 21 0.0173 -1.39 0.4
--.LRG.Z. 1985-04-13T11:23:30.10 10.0 undecidable manual PN 256 0.0286 -0.26 1.3
--.LMR.Z. 1985-04-13T11:23:28.00 10.0 undecidable manual PN 254 0.028 -1.44 0.7
--.FRF.Z. 1985-04-13T11:23:26.00 10.0 undecidable manual PN 257 0.0266 -1.22 0.8
--.FO1.Z. 1985-04-13T11:23:26.50 10.0 undecidable manual PN 32 0.0249 1.7 0.5
--.SAL.Z. 1985-04-13T11:23:23.00 10.0 undecidable manual SN 356 0.0121 -0.19 0.7
--.CH1.Z. 1985-04-13T11:23:19.00 10.0 undecidable manual SN 123 0.0102 0.86 0.6
--.STV.Z. 1985-04-13T11:23:18.00 10.0 undecidable manual PN 270 0.0212 -1.13 1
--.VAI.Z. 1985-04-13T11:23:17.00 10.0 undecidable manual PN 321 0.0186 1.83 0.5
--.CTI.Z. 1985-04-13T11:23:11.80 10.0 undecidable manual PN 21 0.0173 -1.31 1
--.BG1.Z. 1985-04-13T11:23:11.00 10.0 undecidable manual PN 337 0.0148 1.66 0.7
--.SAL.Z. 1985-04-13T11:23:03.00 10.0 undecidable manual PN? 356 0.0121 -2.2 0.1
--.CH1.Z. 1985-04-13T11:23:02.00 10.0 undecidable manual PN 123 0.0102 -0.29 1.8
--.PS9.Z. 1985-04-13T11:23:00.00 10.0 undecidable manual SG 188 0.0049 0.02 1.1
--.PS9.Z. 1985-04-13T11:22:51.50 10.0 undecidable manual PG 188 0.0049 -0.3 3.6
--.BD1.Z. 1985-04-13T11:22:51.00 10.0 undecidable manual SG 187 0.0018 2.09 0.2
--.BD1.Z. 1985-04-13T11:22:45.20 10.0 negative manual PG 187 0.0018 -0.21 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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