Earthquake with magnitude of Md 2.5 on date 20-02-1997 and time 15:11:16 (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

  • 20-02-1997 14:11:16 (UTC)
  • 20-02-1997 15:11:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.97, 15.89 at 168 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
37 Km W of Lamezia Terme (70714 inhabitants)
48 Km SW of Cosenza (67546 inhabitants)
61 Km W of Catanzaro (90612 inhabitants)
91 Km NE of Messina (238439 inhabitants)
98 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
Rev 1000 Md 2.5
ML-VAX 2.3
1997-02-20
14:11:16
38.97 15.89 168 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 261429
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-02-20 14:11:16 ± 0.522
Latitude 38.97 ± 0.02
Longitude 15.89 ± 0.11
Depth (km) 168 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 261429

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) 9837.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00389
Epicentral distance of station farthest from the epicenter (degree) 0.01603
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 261429
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:07:17

ML:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 261429
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
--.LT9.Z. 1997-02-20T14:12:14.50 10.0 undecidable manual S 23 0.016 -0.93 0.2
--.ORI.Z. 1997-02-20T14:12:05.17 10.0 undecidable manual S 21 0.0104 0.35 0.5
--.MO9.Z. 1997-02-20T14:12:01.78 10.0 undecidable manual S 189 0.0087 -0.38 0.5
--.SOI.Z. 1997-02-20T14:12:01.36 10.0 undecidable manual S 172 0.0081 0.18 0.7
--.TDS.Z. 1997-02-20T14:11:59.22 10.0 undecidable manual S 26 0.0069 -0.38 0.6
--.GRI.Z. 1997-02-20T14:11:56.50 10.0 undecidable manual S 109 0.0039 0.02 0.7
--.LT9.Z. 1997-02-20T14:11:50.10 10.0 undecidable manual P 23 0.016 -0.38 1.1
--.SL9.Z. 1997-02-20T14:11:47.36 10.0 undecidable manual P 352 0.0129 0.54 0.9
--.ORI.Z. 1997-02-20T14:11:43.50 10.0 undecidable manual P 21 0.0104 -0.76 0.7
--.MO9.Z. 1997-02-20T14:11:42.64 10.0 undecidable manual P 189 0.0087 -0.08 1.7
--.TDS.Z. 1997-02-20T14:11:41.50 10.0 undecidable manual P 26 0.0069 0.25 1.7
--.SOI.Z. 1997-02-20T14:11:41.93 10.0 negative manual P 172 0.0081 -0.23 2.9
--.GRI.Z. 1997-02-20T14:11:40.50 10.0 negative manual P 109 0.0039 1.05 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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