Earthquake with magnitude of Md 2.6 on date 23-04-1987 and time 11:49:22 (Italy) in region 3 km S Terravecchia (CS)

A magnitude Md 2.6 earthquake occured in region: 3 km S Terravecchia (CS), on

  • 23-04-1987 09:49:22 (UTC)
  • 23-04-1987 11:49:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.44, 16.94 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
Terravecchia CS 3 823 823
Scala Coeli CS 5 1014 1837
Crucoli KR 6 3115 4952
Cariati CS 6 8355 13307
Mandatoriccio CS 10 2872 16179
Umbriatico KR 10 863 17042
Campana CS 10 1813 18855
Pietrapaola CS 12 1141 19996
CirĂ² KR 12 2936 22932
Pallagorio KR 15 1217 24149
Carfizzi KR 15 661 24810
Verzino KR 16 1851 26661
Bocchigliero CS 16 1298 27959
Melissa KR 17 3549 31508
San Nicola dell'Alto KR 17 856 32364
Caloveto CS 18 1263 33627
Calopezzati CS 18 1369 34996
CirĂ² Marina KR 18 14902 49898
Savelli KR 20 1271 51169

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Crotone (62178 inhabitants)
61 Km E of Cosenza (67546 inhabitants)
67 Km NE of Catanzaro (90612 inhabitants)
74 Km NE of Lamezia Terme (70714 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 2.6 1987-04-23
09:49:22
39.44 16.94 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 45439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-23 09:49:22 ± 0.723
Latitude 39.44 ± 0.02
Longitude 16.94 ± 0.07
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45439

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) 5912.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 244
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00461
Epicentral distance of station farthest from the epicenter (degree) 0.01141
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 45439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MG9.Z. 1987-04-23T09:50:06.00 10.0 undecidable manual SN 303 0.0114 1.01 0.1
--.GR9.Z. 1987-04-23T09:49:50.00 10.0 undecidable manual SG 212 0.0066 0.53 0.5
--.MG9.Z. 1987-04-23T09:49:47.80 10.0 undecidable manual PN 303 0.0114 0.6 0.9
--.TS9.Z. 1987-04-23T09:49:41.50 10.0 undecidable manual SG 294 0.0046 -0.78 0.3
--.ORI.Z. 1987-04-23T09:49:37.50 10.0 undecidable manual PG 327 0.0065 -0.39 1.6
--.GR9.Z. 1987-04-23T09:49:37.80 10.0 undecidable manual PG 212 0.0066 -0.43 1.5
--.TS9.Z. 1987-04-23T09:49:34.00 10.0 undecidable manual PG 294 0.0046 -0.08 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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