Earthquake with magnitude of Md 3.1 on date 11-04-1988 and time 22:55:46 (UTC) in region 1 km NW Melilli (SR)

A magnitude Md 3.1 earthquake occured in region: 1 km NW Melilli (SR), on

  • 11-04-1988 22:55:46 (UTC)
  • 12-04-1988 00:55:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.19, 15.12 at 5 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
Melilli SR 2 13621 13621
Priolo Gargallo SR 7 12091 25712
Sortino SR 8 8690 34402
Solarino SR 10 8091 42493
Augusta SR 10 36305 78798
Floridia SR 12 22762 101560
Carlentini SR 13 17798 119358
Lentini SR 15 24085 143443
Ferla SR 17 2523 145966
Cassaro SR 18 821 146787
Canicattini Bagni SR 18 7109 153896

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Siracusa (122291 inhabitants)
35 Km S of Catania (314555 inhabitants)
45 Km NE of Ragusa (73313 inhabitants)
47 Km S of Acireale (52622 inhabitants)
48 Km NE of Modica (54633 inhabitants)
58 Km NE of Vittoria (63339 inhabitants)
78 Km E of Gela (75827 inhabitants)
99 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
Bulletin
Rev1000
Md 3.1
ML-VAX 2.4
1988-04-11
22:55:46
37.19 15.12 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 66339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-04-11 22:55:46 ± 0.3
Latitude 37.19 ± 0.02
Longitude 15.12 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 66339

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) 3899.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
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) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.03602
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 66339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:02:49

ML:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 66339
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
--.BRT.Z. 1988-04-11T22:57:33.42 10.0 undecidable manual SN 22 0.036 -0.47 0.3
--.CZI.Z. 1988-04-11T22:56:50.00 10.0 undecidable manual SN 21 0.0196 -0.47 0.5
--.BRT.Z. 1988-04-11T22:56:47.51 10.0 undecidable manual PN 22 0.036 -1.13 0.3
--.MGR.Z. 1988-04-11T22:56:35.26 10.0 undecidable manual PN 6 0.0266 0.89 0.6
--.GIB.Z. 1988-04-11T22:56:26.74 10.0 undecidable manual SN 313 0.0105 0.11 0.7
--.GMB.Z. 1988-04-11T22:56:24.82 10.0 undecidable manual SN 29 0.0101 -0.67 0.4
--.SOI.Z. 1988-04-11T22:56:24.40 10.0 undecidable manual SN 39 0.0104 -2.05 0
--.CZI.Z. 1988-04-11T22:56:23.85 10.0 undecidable manual PN 21 0.0196 0.28 1.3
--.GRI.Z. 1988-04-11T22:56:21.48 10.0 undecidable manual PN 31 0.0173 1.36 0.3
--.CVT.Z. 1988-04-11T22:56:20.23 10.0 undecidable manual PN 285 0.0172 0.38 1.3
--.MCT.Z. 1988-04-11T22:56:12.18 10.0 undecidable manual PN 290 0.0114 1.06 0.6
--.GIB.Z. 1988-04-11T22:56:09.77 10.0 undecidable manual PN 313 0.0105 -0.03 1.6
--.GMB.Z. 1988-04-11T22:56:09.16 10.0 undecidable manual PN 29 0.0101 0.01 1.6
--.SOI.Z. 1988-04-11T22:56:09.36 10.0 undecidable manual PN 39 0.0104 -0.13 1.6
--.FAI.Z. 1988-04-11T22:56:08.50 10.0 undecidable manual PN 274 0.0104 -1 0.7
--.ATN.Z. 1988-04-11T22:56:07.50 10.0 undecidable manual PG 15 0.009 0.38 1.4
--.PZI.Z. 1988-04-11T22:55:54.50 10.0 undecidable manual SG 225 0.0017 0.13 0.6
--.PZI.Z. 1988-04-11T22:55:51.50 10.0 negative manual PG 225 0.0017 0.32 3
--.MEU.Z. 1988-04-11T22:55:51.57 10.0 negative manual PG 250 0.0021 -0.72 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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