Earthquake with magnitude of Md 3.2 on date 25-12-1985 and time 11:49:54 (Italy) in region 4 km NE Viagrande (CT)

A magnitude Md 3.2 earthquake occured in region: 4 km NE Viagrande (CT), on

  • 25-12-1985 10:49:54 (UTC)
  • 25-12-1985 11:49:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.642, 15.112 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
Viagrande CT 4 8563 8563
Trecastagni CT 4 10910 19473
Aci Sant'Antonio CT 4 17984 37457
Aci Bonaccorsi CT 5 3524 40981
Aci Catena CT 5 29851 70832
Pedara CT 5 14102 84934
Santa Venerina CT 6 8592 93526
Acireale CT 6 52622 146148
Zafferana Etnea CT 6 9517 155665
Valverde CT 7 7840 163505
San Giovanni la Punta CT 7 23060 186565
Tremestieri Etneo CT 8 20589 207154
Nicolosi CT 8 7463 214617
San Gregorio di Catania CT 9 11966 226583
Mascalucia CT 9 31958 258541
Milo CT 9 1087 259628
Sant'Agata li Battiati CT 10 9479 269107
Aci Castello CT 10 18723 287830
Gravina di Catania CT 10 25838 313668
San Pietro Clarenza CT 11 7743 321411
Giarre CT 12 27659 349070
Sant'Alfio CT 12 1582 350652
Camporotondo Etneo CT 12 5023 355675
Belpasso CT 13 28108 383783
Riposto CT 13 14838 398621
Mascali CT 15 14282 412903
Ragalna CT 15 3924 416827
Catania CT 16 314555 731382
Misterbianco CT 16 49410 780792
Fiumefreddo di Sicilia CT 19 9623 790415
Motta Sant'Anastasia CT 19 12116 802531
Piedimonte Etneo CT 20 3963 806494
PaternĂ² CT 20 48228 854722
Santa Maria di Licodia CT 20 7641 862363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km NW of Acireale (52622 inhabitants)
16 Km N of Catania (314555 inhabitants)
67 Km N of Siracusa (122291 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km SW of Messina (238439 inhabitants)
86 Km NE of Ragusa (73313 inhabitants)
92 Km NE of Vittoria (63339 inhabitants)
92 Km NE of Modica (54633 inhabitants)
94 Km E of Caltanissetta (63360 inhabitants)
99 Km NE of Gela (75827 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 3.2 1985-12-25
10:49:54
37.642 15.112 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 18929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-25 10:49:54 ± 0.205
Latitude 37.6420 ± 0.0149
Longitude 15.1120 ± 0.0275
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18929

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) 2931.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00534
Epicentral distance of station farthest from the epicenter (degree) 0.02623
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

Md:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 18929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:21:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SGO.Z. 1985-12-25T10:50:41.00 10.0 undecidable manual PN 2 0.0262 0.35 0.9
--.ORI.Z. 1985-12-25T10:50:37.00 10.0 undecidable manual PN 22 0.0236 0.45 0.9
--.CSI.Z. 1985-12-25T10:50:33.60 10.0 undecidable manual PN 22 0.021 1.04 0.4
--.MMN.Z. 1985-12-25T10:50:32.30 10.0 undecidable manual PN 16 0.0211 -0.51 0.9
--.ERC.Z. 1985-12-25T10:50:28.50 10.0 undecidable manual PN 281 0.0182 0.05 1.3
--.GIB.Z. 1985-12-25T10:50:27.50 10.0 undecidable manual SG 292 0.0083 1.39 0.1
--.CZI.Z. 1985-12-25T10:50:23.80 10.0 undecidable manual PN 26 0.0159 -1.02 0.5
--.RI2.Z. 1985-12-25T10:50:20.10 10.0 undecidable manual PN 53 0.0119 1.27 0.3
--.FAI.Z. 1985-12-25T10:50:17.00 10.0 undecidable manual PN 252 0.0108 -0.07 1.5
--.PZI.Z. 1985-12-25T10:50:16.00 10.0 undecidable manual SG 192 0.0053 0.3 0.8
--.DR2.Z. 1985-12-25T10:50:16.50 10.0 undecidable manual PN 32 0.0107 -0.42 1.2
--.GIB.Z. 1985-12-25T10:50:12.00 10.0 negative manual PG 292 0.0083 -0.75 1.7
--.GA2.Z. 1985-12-25T10:50:08.90 10.0 undecidable manual PG 46 0.0069 -1.04 0.5
--.MSI.Z. 1985-12-25T10:50:07.50 10.0 undecidable manual PG 31 0.0059 -0.37 1.3
--.PZI.Z. 1985-12-25T10:50:06.50 10.0 positive manual PG 192 0.0053 -0.25 2.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download