Earthquake with magnitude of Md 3.8 on date 16-12-1990 and time 13:50:28 (UTC) in region Costa Siracusana (Siracusa)

A magnitude Md 3.8 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 16-12-1990 13:50:28 (UTC)
  • 16-12-1990 14:50:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.25, 15.37 at 6 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
Augusta SR 13 36305 36305
Priolo Gargallo SR 19 12091 48396

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Siracusa (122291 inhabitants)
37 Km SE of Catania (314555 inhabitants)
44 Km SE of Acireale (52622 inhabitants)
67 Km NE of Ragusa (73313 inhabitants)
69 Km NE of Modica (54633 inhabitants)
81 Km E of Vittoria (63339 inhabitants)
99 Km S of Reggio di Calabria (183035 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 3.8
ML-VAX 3.5
1990-12-16
13:50:28
37.25 15.37 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 132499
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-12-16 13:50:28 ± 0.532
Latitude 37.25 ± 0.02
Longitude 15.37 ± 0.03
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 132499

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) 3275.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 206
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.08297
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

Md:3.8

Field Value
Value 3.8
Uncertainty
Num. used stations 11
Type of magnitude Md
Reference to an origin 132499
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:03:26

ML:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 10
Type of magnitude ML
Reference to an origin 132499
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
--.CTI.Z. 1990-12-16T13:52:42.50 10.0 undecidable manual PN 343 0.083 1.19 0.3
--.BRT.Z. 1990-12-16T13:52:11.00 10.0 undecidable manual SN 20 0.0348 -0.75 0.3
--.CSI.Z. 1990-12-16T13:51:41.00 10.0 undecidable manual SN 15 0.0236 -1.22 0.2
--.SDI.Z. 1990-12-16T13:51:38.84 10.0 negative manual PN 345 0.0415 0.73 1.6
--.DUI.Z. 1990-12-16T13:51:37.70 10.0 undecidable manual PN 350 0.0401 1.07 0.6
--.BAI.Z. 1990-12-16T13:51:28.50 10.0 undecidable manual PN 16 0.0362 -1.56 0.2
--.CDT.Z. 1990-12-16T13:51:28.00 10.0 undecidable manual PN 9 0.035 -0.2 1.2
--.BRT.Z. 1990-12-16T13:51:27.00 10.0 undecidable manual PN 20 0.0348 -0.96 0.7
--.PE1.Z. 1990-12-16T13:51:26.00 10.0 undecidable manual PN! 23 0.0351 -2.22 0
--.LCI.Z. 1990-12-16T13:51:25.00 10.0 undecidable manual PN 33 0.0338 -1.25 0.5
--.SGO.Z. 1990-12-16T13:51:20.44 10.0 undecidable manual PN 358 0.0297 0.29 1.3
--.ORI.Z. 1990-12-16T13:51:15.98 10.0 undecidable manual PN 16 0.0262 1.11 0.7
--.MCT.Z. 1990-12-16T13:51:14.72 10.0 undecidable manual SN 285 0.013 0.81 0.5
--.CSI.Z. 1990-12-16T13:51:12.10 10.0 undecidable manual PN 15 0.0236 1.09 0.7
--.FAI.Z. 1990-12-16T13:51:11.19 10.0 undecidable manual SN 271 0.0121 -0.51 0.6
--.MMN.Z. 1990-12-16T13:51:11.60 10.0 negative manual PN 9 0.0241 0.02 1.6
--.ROI.Z. 1990-12-16T13:51:10.50 10.0 undecidable manual PN 21 0.0225 1.38 0.5
--.TDS.Z. 1990-12-16T13:51:08.89 10.0 undecidable manual PN 16 0.0227 -0.53 1.3
--.ERC.Z. 1990-12-16T13:51:05.89 10.0 undecidable manual PN 290 0.021 -0.93 0.9
--.CVT.Z. 1990-12-16T13:51:05.92 10.0 undecidable manual PN! 282 0.0188 2.52 0
--.USI.Z. 1990-12-16T13:51:04.67 10.0 undecidable manual PN 310 0.0202 -1.07 0.8
--.GMB.Z. 1990-12-16T13:51:01.30 10.0 undecidable manual SG 21 0.0088 -1.39 0.2
--.GRI.Z. 1990-12-16T13:51:00.60 10.0 undecidable manual PN 27 0.0159 0.92 1
--.MNO.Z. 1990-12-16T13:50:59.50 10.0 undecidable manual SG 321 0.0078 0.98 0.4
--.ATN.Z. 1990-12-16T13:50:59.36 10.0 undecidable manual SG 4 0.0082 -0.6 0.5
--.MO9.Z. 1990-12-16T13:50:56.29 10.0 undecidable manual SG 18 0.0071 0.06 0.7
--.MCT.Z. 1990-12-16T13:50:55.90 10.0 positive manual PN 285 0.013 1.33 1.2
--.FAI.Z. 1990-12-16T13:50:52.53 10.0 positive manual PN 271 0.0121 -0.76 2.3
--.GIB.Z. 1990-12-16T13:50:51.85 10.0 undecidable manual PN 304 0.0116 -0.65 1.3
--.GMB.Z. 1990-12-16T13:50:48.62 10.0 undecidable manual PG 21 0.0088 0.69 1.3
--.SOI.Z. 1990-12-16T13:50:47.73 10.0 undecidable manual PG 33 0.0088 -0.18 1.7
--.ATN.Z. 1990-12-16T13:50:46.13 10.0 positive manual PG 4 0.0082 -0.39 3.1
--.PZI.Z. 1990-12-16T13:50:45.00 10.0 undecidable manual SG 239 0.0035 1.81 0.1
--.MEU.Z. 1990-12-16T13:50:44.22 10.0 undecidable manual SG 251 0.004 -0.97 0.3
--.MNO.Z. 1990-12-16T13:50:44.93 10.0 negative manual PG 321 0.0078 -0.75 2.3
--.MO9.Z. 1990-12-16T13:50:44.83 10.0 undecidable manual PG 18 0.0071 0.47 1.5
--.SC9.Z. 1990-12-16T13:50:44.95 10.0 undecidable manual PG! 14 0.0093 -4.02 0
--.PZI.Z. 1990-12-16T13:50:36.60 10.0 positive manual PG 239 0.0035 -0.23 3.3
--.MEU.Z. 1990-12-16T13:50:36.87 10.0 undecidable manual PG 251 0.004 -1.11 0.7
--.GIO.Z. 1990-12-16T13:50:36.68 10.0 positive manual PG 326 0.0033 0.06 3.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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