ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.2 on date 20-10-1987 and time 02:53:23 (UTC) in region 1 km SW Santa Maria del Cedro (CS)

A magnitude Md 2.2 earthquake occured in region: 1 km SW Santa Maria del Cedro (CS), on

  • 20-10-1987 02:53:23 (UTC)
  • 20-10-1987 03:53:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.74, 15.83 at 1 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
Santa Maria del Cedro CS 2 4954 4954
Grisolia CS 2 2249 7203
Maierà CS 3 1224 8427
Diamante CS 7 5329 13756
Buonvicino CS 7 2247 16003
Verbicaro CS 7 3056 19059
Scalea CS 8 10913 29972
Santa Domenica Talao CS 10 1263 31235
Orsomarso CS 10 1265 32500
San Nicola Arcella CS 13 1957 34457
Belvedere Marittimo CS 14 9371 43828
Papasidero CS 16 734 44562
Sangineto CS 17 1338 45900
Bonifati CS 18 2858 48758
Praia a Mare CS 18 6725 55483
Sant'Agata di Esaro CS 18 1890 57373
San Donato di Ninea CS 19 1360 58733
San Sosti CS 19 2185 60918

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km NW of Cosenza (67546 inhabitants)
95 Km NW 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
Rev 1000 Md 2.2
ML-VAX 1.6
1987-10-20
02:53:23
39.74 15.83 1 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 57269
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-20 02:53:23 ± 0.449
Latitude 39.74 ± 0.03
Longitude 15.83 ± 0.02
Depth (km) 1 ± 8 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 57269

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) 3335.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00316
Epicentral distance of station farthest from the epicenter (degree) 0.00915
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 57269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:55

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 57269
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
--.ORI.Z. 1987-10-20T02:53:45.70 10.0 undecidable manual SG 56 0.005 0.25 0.4
--.GRI.Z. 1987-10-20T02:53:44.64 10.0 undecidable manual PG? 153 0.0091 -0.13 0.4
--.MGR.Z. 1987-10-20T02:53:40.33 10.0 undecidable manual SG 332 0.004 -0.77 0
--.ORI.Z. 1987-10-20T02:53:36.36 10.0 undecidable manual PG 56 0.005 0.09 1.5
--.MGR.Z. 1987-10-20T02:53:34.14 10.0 undecidable manual PG 332 0.004 0.38 0.7
--.CSI.Z. 1987-10-20T02:53:31.60 10.0 undecidable manual PG 82 0.0032 -0.09 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download