Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-02-2021 and time 18:10:44 (Italy) in region Costa Calabra nord occidentale (Cosenza)

A magnitude ML 1.6 earthquake occured in region: Costa Calabra nord occidentale (Cosenza), on

  • 20-02-2021 17:10:44 (UTC)
  • 20-02-2021 18:10:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.3, 15.89 at 74 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Lucido CS 14 6047 6047
Paola CS 15 16013 22060
Fiumefreddo Bruzio CS 17 2994 25054
Falconara Albanese CS 17 1427 26481
Fuscaldo CS 18 8140 34621
Longobardi CS 19 2312 36933

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Cosenza (67546 inhabitants)
52 Km NW of Lamezia Terme (70714 inhabitants)
75 Km NW of Catanzaro (90612 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.6 2021-02-20
17:10:44		 39.3 15.89 74 2021-02-20
17:18:24		 Sala Sismica INGV-Roma 87333581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-20 17:10:44 ± 0.81
Latitude 39.30 ± 0.15
Longitude 15.89 ± 0.10
Depth (km) 74 ± 14 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87333581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18480
Semi-minor axis of confidence ellipse (meter) 3726
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 18480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 259
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.66999
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 3
Type of magnitude ML
Reference to an origin 87333581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-20 17:18:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.GSCL.HHZ. 2021-02-20T17:12:43.67 3.0 undecidable manual Pg 15.95 0
IV.VCEL.EHZ. 2021-02-20T17:12:34.68 3.0 undecidable manual Sg 4.06 0
IV.MNTT.EHZ. 2021-02-20T17:12:32.97 3.0 undecidable manual Sn -9.99 0
IV.RIBO.EHZ.01 2021-02-20T17:12:22.32 3.0 undecidable manual Pg 11.5 0
IV.SFI.EHZ. 2021-02-20T17:12:14.33 3.0 undecidable manual Pn -0.77 0
IV.COLB.HHZ. 2021-02-20T17:11:57.32 3.0 undecidable manual Sg 0.72 0
IV.RMP.HHZ. 2021-02-20T17:11:46.45 3.0 positive manual Pg -1.38 0
IV.CROCE.HHZ. 2021-02-20T17:11:39.10 3.0 positive manual Pg 2.85 0
IV.NOV.HHZ. 2021-02-20T17:11:15.09 3.0 negative manual Pg -3.64 0
IV.SERS.HHZ. 2021-02-20T17:11:10.91 0.1 undecidable manual S 113 0.67 128 0.5 65
IV.CELI.HHZ. 2021-02-20T17:11:06.96 0.1 undecidable manual S 78 0.4865 138 -0.23 89
IV.SPS2.HHZ. 2021-02-20T17:11:04.33 0.1 undecidable manual S 91 0.3444 148 -0.83 90
IV.CET2.HHZ. 2021-02-20T17:11:03.85 0.1 undecidable manual S 12 0.2338 158 -0.1 99
IV.SERS.HHZ. 2021-02-20T17:10:58.97 0.1 undecidable manual P 113 0.67 128 -0.34 93
IV.CELI.HHZ. 2021-02-20T17:10:57.26 0.1 undecidable manual P 78 0.4865 138 -0.19 92
IV.SPS2.HHZ. 2021-02-20T17:10:55.48 0.1 undecidable manual P 91 0.3444 148 -0.8 88
IV.CET2.HHZ. 2021-02-20T17:10:55.59 0.1 negative manual P 12 0.2338 158 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CET2.HHE. ML:1.7 7.5E-5 0.44 AML other m 2021-02-20T17:11:04.34
IV.CET2.HHN. ML:1.8 8.4190065E-5 0.5632 AML other m 2021-02-20T17:11:04.53
IV.SPS2.HHE. ML:0.9 7.828222E-6 0.1536 AML other m 2021-02-20T17:11:04.75
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