Earthquake with magnitude of Md 2.4 on date 27-09-1991 and time 17:35:41 (UTC) in region Costa Siciliana nord orientale (Messina)

A magnitude Md 2.4 earthquake occured in region: Costa Siciliana nord orientale (Messina), on

  • 27-09-1991 17:35:41 (UTC)
  • 27-09-1991 19:35:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.36, 15.33 at 117 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
Spadafora ME 16 5021 5021
Venetico ME 16 3911 8932
Villafranca Tirrena ME 17 8584 17516
Milazzo ME 17 31646 49162
Valdina ME 19 1355 50517
Torregrotta ME 19 7431 57948

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Messina (238439 inhabitants)
39 Km NW of Reggio di Calabria (183035 inhabitants)
85 Km N of Acireale (52622 inhabitants)
98 Km N of Catania (314555 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 2.4
ML-VAX 1.9
1991-09-27
17:35:41
38.36 15.33 117 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 149999
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-09-27 17:35:41 ± 0.492
Latitude 38.36 ± 0.02
Longitude 15.33 ± 0.05
Depth (km) 117 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 149999

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) 4909.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 212
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.01603
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 149999
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:20:00

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 149999
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
--.GRI.Z. 1991-09-27T17:36:18.64 10.0 undecidable manual S 61 0.0087 0.05 0.6
--.SOI.Z. 1991-09-27T17:36:14.17 10.0 undecidable manual S 116 0.0057 0.61 0.1
--.MGR.Z. 1991-09-27T17:36:12.43 10.0 undecidable manual P 5 0.016 0.48 0.3
--.MO9.Z. 1991-09-27T17:36:11.97 10.0 undecidable manual S 141 0.0041 0.51 0.1
--.CSI.Z. 1991-09-27T17:36:10.28 10.0 undecidable manual P 27 0.0144 0.48 0.3
--.MMN.Z. 1991-09-27T17:36:09.80 10.0 undecidable manual P 18 0.0145 -0.04 2.3
--.ATN.Z. 1991-09-27T17:36:09.16 10.0 undecidable manual S 152 0.002 -0.46 0.2
--.ROI.Z. 1991-09-27T17:36:09.40 10.0 undecidable manual P 38 0.0138 0.31 0.7
--.TDS.Z. 1991-09-27T17:36:08.55 10.0 undecidable manual P 30 0.0136 -0.18 1
--.ACI.Z. 1991-09-27T17:36:05.12 10.0 undecidable manual P 34 0.0108 -0.03 2.7
--.CZI.Z. 1991-09-27T17:36:03.26 10.0 undecidable manual P 36 0.0095 -0.4 1.2
--.GRI.Z. 1991-09-27T17:36:02.57 10.0 undecidable manual P 61 0.0087 -0.17 1.3
--.SOI.Z. 1991-09-27T17:35:59.55 10.0 positive manual P 116 0.0057 -0.28 1.9
--.MO9.Z. 1991-09-27T17:35:58.81 10.0 undecidable manual P 141 0.0041 0.19 1.2
--.ATN.Z. 1991-09-27T17:35:57.28 10.0 undecidable manual P 152 0.002 -0.28 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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