Earthquake with magnitude of Md 2.5 on date 22-04-1985 and time 07:38:45 (UTC) in region 3 km NE Maletto (CT)

A magnitude Md 2.5 earthquake occured in region: 3 km NE Maletto (CT), on

  • 22-04-1985 07:38:45 (UTC)
  • 22-04-1985 09:38:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.84, 14.9 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
Maletto CT 3 3920 3920
Randazzo CT 6 10900 14820
Maniace CT 8 3765 18585
Bronte CT 8 19172 37757
Santa Domenica Vittoria ME 10 980 38737
Roccella Valdemone ME 14 666 39403
Moio Alcantara ME 15 717 40120
Floresta ME 16 485 40605
Malvagna ME 16 733 41338
CesarĂ² ME 16 2439 43777
San Teodoro ME 17 1403 45180

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of Acireale (52622 inhabitants)
41 Km NW of Catania (314555 inhabitants)
70 Km SW of Messina (238439 inhabitants)
72 Km W of Reggio di Calabria (183035 inhabitants)
83 Km NE of Caltanissetta (63360 inhabitants)
94 Km NW of Siracusa (122291 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 2.5 1985-04-22
07:38:45
37.85 14.9 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-22 07:38:45 ± 0.541
Latitude 37.85 ± 0.02
Longitude 14.90 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5249

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) 5910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00631
Epicentral distance of station farthest from the epicenter (degree) 0.00729
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 5249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PA1.Z. 1985-04-22T07:39:15.00 10.0 undecidable manual SG 178 0.0073 0.97 0.6
--.GIB.Z. 1985-04-22T07:39:12.00 10.0 undecidable manual SG 281 0.0063 1.55 0.3
--.SA1.Z. 1985-04-22T07:39:12.50 10.0 undecidable manual SG 355 0.0064 1.5 0.3
--.PA1.Z. 1985-04-22T07:39:02.00 10.0 undecidable manual PG? 178 0.0073 -0.18 1
--.SA1.Z. 1985-04-22T07:39:00.00 10.0 undecidable manual PG 355 0.0064 -0.43 2.4
--.GIB.Z. 1985-04-22T07:38:59.00 10.0 undecidable manual PG 281 0.0063 -1.11 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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