Earthquake with magnitude of Md 2.7 on date 25-12-1985 and time 06:21:45 (UTC) in region 1 km NE Zafferana Etnea (CT)

A magnitude Md 2.7 earthquake occured in region: 1 km NE Zafferana Etnea (CT), on

  • 25-12-1985 06:21:45 (UTC)
  • 25-12-1985 07:21:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7, 15.11 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
Zafferana Etnea CT 1 9517 9517
Milo CT 2 1087 10604
Santa Venerina CT 3 8592 19196
Sant'Alfio CT 6 1582 20778
Giarre CT 7 27659 48437
Riposto CT 9 14838 63275
Mascali CT 10 14282 77557
Trecastagni CT 10 10910 88467
Viagrande CT 10 8563 97030
Pedara CT 10 14102 111132
Aci Sant'Antonio CT 11 17984 129116
Acireale CT 11 52622 181738
Aci Catena CT 11 29851 211589
Aci Bonaccorsi CT 12 3524 215113
Nicolosi CT 12 7463 222576
Fiumefreddo di Sicilia CT 13 9623 232199
Piedimonte Etneo CT 13 3963 236162
Valverde CT 14 7840 244002
San Giovanni la Punta CT 14 23060 267062
Tremestieri Etneo CT 14 20589 287651
Mascalucia CT 15 31958 319609
San Gregorio di Catania CT 15 11966 331575
Linguaglossa CT 16 5403 336978
Sant'Agata li Battiati CT 16 9479 346457
Gravina di Catania CT 16 25838 372295
San Pietro Clarenza CT 16 7743 380038
Aci Castello CT 17 18723 398761
Calatabiano CT 17 5308 404069
Belpasso CT 17 28108 432177
Ragalna CT 17 3924 436101
Camporotondo Etneo CT 18 5023 441124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NW of Acireale (52622 inhabitants)
22 Km N of Catania (314555 inhabitants)
65 Km SW of Reggio di Calabria (183035 inhabitants)
67 Km SW of Messina (238439 inhabitants)
73 Km N of Siracusa (122291 inhabitants)
93 Km NE of Ragusa (73313 inhabitants)
95 Km E of Caltanissetta (63360 inhabitants)
98 Km NE of Vittoria (63339 inhabitants)
99 Km NE of Modica (54633 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 2.7 1985-12-25
06:21:45
37.7 15.11 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 18879
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-25 06:21:45 ± 0.284
Latitude 37.70 ± 0.02
Longitude 15.11 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18879

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) 3526.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00542
Epicentral distance of station farthest from the epicenter (degree) 0.01967
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 18879
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:21:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ROI.Z. 1985-12-25T06:22:22.80 10.0 undecidable manual PN 30 0.0197 0.9 0.5
--.GIB.Z. 1985-12-25T06:22:17.50 10.0 undecidable manual SG 288 0.0081 0.75 0.4
--.CZI.Z. 1985-12-25T06:22:15.40 10.0 undecidable manual PN 27 0.0154 0 1.4
--.PZI.Z. 1985-12-25T06:22:10.00 10.0 undecidable manual SG 191 0.0059 1.06 0.2
--.FAI.Z. 1985-12-25T06:22:09.00 10.0 undecidable manual PN 249 0.0109 0.33 1.4
--.MSI.Z. 1985-12-25T06:22:07.00 10.0 undecidable manual SG 34 0.0054 -0.34 0.6
--.DR2.Z. 1985-12-25T06:22:07.10 10.0 undecidable manual PN 34 0.0102 -0.45 1.4
--.GIB.Z. 1985-12-25T06:22:03.00 10.0 undecidable manual PG 288 0.0081 -0.68 1.1
--.GA2.Z. 1985-12-25T06:22:00.60 10.0 undecidable manual PG 50 0.0066 0.09 1.8
--.MSI.Z. 1985-12-25T06:21:58.50 10.0 undecidable manual PG 34 0.0054 0.25 1.8
--.PZI.Z. 1985-12-25T06:21:57.80 10.0 undecidable manual PG 191 0.0059 -1.37 0.4
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