Earthquake with magnitude of Md 3.0 on date 26-10-1987 and time 20:08:06 (UTC) in region Costa Siracusana (Siracusa)

A magnitude Md 3.0 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 26-10-1987 20:08:06 (UTC)
  • 26-10-1987 21:08:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.15, 15.21 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
Priolo Gargallo SR 2 12091 12091
Melilli SR 8 13621 25712
Augusta SR 9 36305 62017
Floridia SR 9 22762 84779
Solarino SR 10 8091 92870
Siracusa SR 13 122291 215161
Sortino SR 16 8690 223851
Canicattini Bagni SR 18 7109 230960

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Siracusa (122291 inhabitants)
41 Km S of Catania (314555 inhabitants)
49 Km NE of Ragusa (73313 inhabitants)
51 Km S of Acireale (52622 inhabitants)
51 Km NE of Modica (54633 inhabitants)
64 Km E of Vittoria (63339 inhabitants)
86 Km E 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 3.0
ML-VAX 2.8
1987-10-26
20:08:06
37.15 15.21 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 57679
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-26 20:08:06 ± 0.473
Latitude 37.15 ± 0.03
Longitude 15.21 ± 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 57679

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) 4412.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 248
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00785
Epicentral distance of station farthest from the epicenter (degree) 0.02744
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 57679
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:55:17

ML:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 57679
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MGR.Z. 1987-10-26T20:09:26.67 10.0 undecidable manual SN 4 0.0269 -1.1 0.1
--.GRI.Z. 1987-10-26T20:09:02.94 10.0 undecidable manual SN 29 0.0172 0.68 0.4
--.ORI.Z. 1987-10-26T20:08:54.00 10.0 undecidable manual PN 17 0.0274 -0.04 1.3
--.MGR.Z. 1987-10-26T20:08:52.72 10.0 undecidable manual PN 4 0.0269 -0.54 0.9
--.GIB.Z. 1987-10-26T20:08:45.27 10.0 undecidable manual SN 311 0.0113 -1.15 0.1
--.SOI.Z. 1987-10-26T20:08:44.30 10.0 undecidable manual SN 35 0.0102 0.68 0.6
--.MSI.Z. 1987-10-26T20:08:42.54 10.0 undecidable manual SN 14 0.0097 0.18 0.7
--.CZI.Z. 1987-10-26T20:08:42.50 10.0 undecidable manual PN 18 0.0197 0.32 1.4
--.ATN.Z. 1987-10-26T20:08:40.40 10.0 undecidable manual SG 10 0.0091 -0.48 0.5
--.FE2.Z. 1987-10-26T20:08:40.00 10.0 undecidable manual SN! 37 0.0101 -3.34 0
--.GRI.Z. 1987-10-26T20:08:39.65 10.0 undecidable manual PN 29 0.0172 1.13 0.3
--.CVT.Z. 1987-10-26T20:08:39.20 10.0 undecidable manual PN 285 0.0179 -0.25 1.5
--.ROI.Z. 1987-10-26T20:08:38.50 10.0 undecidable manual PN! 23 0.0237 -9.9 0
--.GIB.Z. 1987-10-26T20:08:30.35 10.0 undecidable manual PN 311 0.0113 0.97 0.5
--.SOI.Z. 1987-10-26T20:08:27.21 10.0 undecidable manual PN 35 0.0102 -0.55 1.2
--.MSI.Z. 1987-10-26T20:08:27.41 10.0 undecidable manual PN 14 0.0097 0.38 1.5
--.ATN.Z. 1987-10-26T20:08:26.32 10.0 negative manual PG 10 0.0091 0.14 3.5
--.FE2.Z. 1987-10-26T20:08:26.80 10.0 undecidable manual PN 37 0.0101 -0.8 1.6
--.MNO.Z. 1987-10-26T20:08:23.69 10.0 undecidable manual PG 332 0.0079 0.19 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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