Earthquake with magnitude of Md 2.5 on date 07-09-1991 and time 01:16:35 (Italy) in region Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria)

A magnitude Md 2.5 earthquake occured in region: Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria), on

  • 06-09-1991 23:16:35 (UTC)
  • 07-09-1991 01:16:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.9170, 15.7150 at 20 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km W of Lamezia Terme (70714 inhabitants)
63 Km SW of Cosenza (67546 inhabitants)
76 Km W of Catanzaro (90612 inhabitants)
82 Km N of Messina (238439 inhabitants)
90 Km N 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 2.5
ML-VAX 1.5
1991-09-06
23:16:35
38.917 15.715 20 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 148899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-09-06 23:16:35 ± 0.487
Latitude 38.9170 ± 0.0184
Longitude 15.7150 ± 0.0393
Depth (km) 20 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 148899

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) 3964.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
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) 0.00397
Epicentral distance of station farthest from the epicenter (degree) 0.01498
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 148899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:18:58

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 148899
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(km) Takeoff_angle Residual Weight
--.SGO.Z. 1991-09-06T23:17:24.84 10.0 undecidable manual SN 349 1.665 0.61 0.5
--.MGR.Z. 1991-09-06T23:17:12.27 10.0 undecidable manual SN 354 1.221 -1.38 0.2
--.CSI.Z. 1991-09-06T23:17:08.20 10.0 undecidable manual SN 27 0.9657 0.52 0.7
--.ROI.Z. 1991-09-06T23:17:07.80 10.0 undecidable manual SN 45 0.9213 1.22 0.3
--.MMN.Z. 1991-09-06T23:17:06.80 10.0 undecidable manual SN 12 0.9879 -1.37 0.3
--.SOI.Z. 1991-09-06T23:17:04.82 10.0 undecidable manual SN 162 0.8769 -0.7 0.6
--.SGO.Z. 1991-09-06T23:17:04.59 10.0 undecidable manual PN 349 1.665 0.77 1.1
--.ATN.Z. 1991-09-06T23:17:03.50 10.0 undecidable manual SN 194 0.777 0.38 0.7
--.SA1.Z. 1991-09-06T23:17:03.80 10.0 undecidable manual SN 243 0.777 0.9 0.5
--.MGR.Z. 1991-09-06T23:16:56.63 10.0 undecidable manual PN 354 1.221 -1.09 0.9
--.MMN.Z. 1991-09-06T23:16:55.40 10.0 undecidable manual PN 12 0.9879 0.84 1.3
--.CSI.Z. 1991-09-06T23:16:54.32 10.0 undecidable manual PN 27 0.9657 0.05 2
--.SOI.Z. 1991-09-06T23:16:54.58 10.0 undecidable manual PN 162 0.8769 1.55 0.5
--.ROI.Z. 1991-09-06T23:16:53.40 10.0 undecidable manual PN 45 0.9213 -0.23 2
--.SA1.Z. 1991-09-06T23:16:51.51 10.0 undecidable manual PN 243 0.777 0 2
--.ATN.Z. 1991-09-06T23:16:51.50 10.0 undecidable manual PN 194 0.777 -0.14 2
--.MO9.Z. 1991-09-06T23:16:51.74 10.0 undecidable manual PN 181 0.9102 -1.7 0.4
--.CZI.Z. 1991-09-06T23:16:45.20 10.0 undecidable manual PG 47 0.444 -0.29 1.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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