Earthquake with magnitude of Md 2.8 on date 15-02-1985 and time 14:40:38 (Italy) in region 3 km N Acireale (CT)

A magnitude Md 2.8 earthquake occured in region: 3 km N Acireale (CT), on

  • 15-02-1985 13:40:38 (UTC)
  • 15-02-1985 14:40:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.64, 15.16 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
Acireale CT 3 52622 52622
Aci Catena CT 5 29851 82473
Aci Sant'Antonio CT 5 17984 100457
Santa Venerina CT 6 8592 109049
Viagrande CT 7 8563 117612
Aci Bonaccorsi CT 7 3524 121136
Valverde CT 8 7840 128976
Trecastagni CT 8 10910 139886
Zafferana Etnea CT 8 9517 149403
San Giovanni la Punta CT 9 23060 172463
Pedara CT 9 14102 186565
Aci Castello CT 10 18723 205288
San Gregorio di Catania CT 10 11966 217254
Milo CT 10 1087 218341
Giarre CT 10 27659 246000
Tremestieri Etneo CT 11 20589 266589
Riposto CT 11 14838 281427
Sant'Alfio CT 12 1582 283009
Sant'Agata li Battiati CT 12 9479 292488
Mascalucia CT 12 31958 324446
Nicolosi CT 12 7463 331909
Gravina di Catania CT 13 25838 357747
Mascali CT 13 14282 372029
San Pietro Clarenza CT 14 7743 379772
Camporotondo Etneo CT 16 5023 384795
Catania CT 17 314555 699350
Belpasso CT 17 28108 727458
Fiumefreddo di Sicilia CT 17 9623 737081
Piedimonte Etneo CT 19 3963 741044
Misterbianco CT 19 49410 790454
Ragalna CT 20 3924 794378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km N of Acireale (52622 inhabitants)
17 Km NE of Catania (314555 inhabitants)
66 Km N of Siracusa (122291 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
71 Km SW of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
94 Km NE of Modica (54633 inhabitants)
95 Km NE of Vittoria (63339 inhabitants)
98 Km E of Caltanissetta (63360 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 2.8 1985-02-15
13:40:38
37.64 15.16 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1779
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-15 13:40:38 ± 0.274
Latitude 37.64 ± 0.02
Longitude 15.16 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1779

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) 2467.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00575
Epicentral distance of station farthest from the epicenter (degree) 0.01109
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 1779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FA1.Z. 1985-02-15T13:41:19.00 10.0 undecidable manual SN 252 0.0111 0.75 0.4
--.GIB.Z. 1985-02-15T13:41:11.00 10.0 undecidable manual SG 291 0.0086 -0.05 1.3
--.FA1.Z. 1985-02-15T13:41:02.00 10.0 undecidable manual PN 252 0.0111 0.64 1.1
--.MSI.Z. 1985-02-15T13:41:01.50 10.0 undecidable manual SG 28 0.0057 0.73 0.5
--.PA1.Z. 1985-02-15T13:41:01.50 10.0 undecidable manual SG 197 0.0057 0.7 0.5
--.GIB.Z. 1985-02-15T13:40:56.50 10.0 undecidable manual PG 291 0.0086 -0.7 1.1
--.MSI.Z. 1985-02-15T13:40:51.00 10.0 undecidable manual PG 28 0.0057 -0.26 2.1
--.PA1.Z. 1985-02-15T13:40:50.50 10.0 undecidable manual PG 197 0.0057 -0.78 1
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