Earthquake with magnitude of ML 1.6 on date 04-04-2020 and time 22:37:40 (Italy) in region Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria)

A magnitude ML 1.6 earthquake occured in region: Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria), on

  • 04-04-2020 20:37:40 (UTC)
  • 04-04-2020 22:37:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.91, 15.89 at 55 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Lamezia Terme (70714 inhabitants)
53 Km SW of Cosenza (67546 inhabitants)
61 Km W of Catanzaro (90612 inhabitants)
85 Km NE of Messina (238439 inhabitants)
92 Km N of Reggio di Calabria (183035 inhabitants)
Recent and historical Seismicity
Seismic hazard
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 ( 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
Rev 100 ML 1.6 2020-04-04
38.91 15.89 55 2020-04-04
Sala Sismica INGV-Roma 77892381
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-04-04 20:37:40 ± 0.1
Latitude 38.91 ± 0.00
Longitude 15.89 ± 0.01
Depth (km) 55 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77892381


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 849
Semi-minor axis of confidence ellipse (meter) 405
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 850
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61693
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 5
Magnitude information


Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 77892381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 20:50:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CIMA.HNZ. 2020-04-04T20:38:47.58 3.0 positive manual Pn 1.49 0
IV.PTRJ.HNZ. 2020-04-04T20:38:47.93 3.0 undecidable manual Sn -0.5 0
IV.AMUR.HHZ. 2020-04-04T20:38:45.54 3.0 undecidable manual Sg 8.52 0
IV.MC2.EHZ. 2020-04-04T20:38:45.00 3.0 undecidable manual Pn 1.99 0
IV.ROSPO.HHZ. 2020-04-04T20:38:37.82 3.0 positive manual Pg 9.17 0
IV.LRP.EHZ. 2020-04-04T20:38:28.87 3.0 undecidable manual Pn 2.97 0
IX.STN3.HHZ.02 2020-04-04T20:38:23.63 3.0 undecidable manual Sn -1.13 0
IV.VCRE.HHZ. 2020-04-04T20:38:12.04 3.0 undecidable manual Pn 0.22 0
IV.CET2.HHZ. 2020-04-04T20:38:03.80 0.6 undecidable manual S 4 0.6169 117 -0.15 46
IV.SPS2.HHZ. 2020-04-04T20:38:01.86 0.6 undecidable manual S 42 0.5117 124 0.08 48
IV.CAR1.HHZ. 2020-04-04T20:38:00.17 0.6 undecidable manual S 36 0.42 131 0.14 48
IV.JOPP.HHZ. 2020-04-04T20:37:58.10 0.6 undecidable manual S 181 0.3058 141 -0.02 50
XK.GIZZ.HHZ. 2020-04-04T20:37:57.33 0.6 undecidable manual S 75 0.2536 147 -0.06 51
IV.CET2.HHZ. 2020-04-04T20:37:54.25 0.3 positive manual P 4 0.6169 117 0.03 71
IV.SPS2.HHZ. 2020-04-04T20:37:52.96 0.1 undecidable manual P 42 0.5117 124 -0.01 97
IV.CAR1.HHZ. 2020-04-04T20:37:51.93 0.6 undecidable manual P 36 0.42 131 -0.03 49
XK.GIZZ.HHZ. 2020-04-04T20:37:50.35 0.3 negative manual P 75 0.2536 147 -0.08 76
IV.JOPP.HHZ. 2020-04-04T20:37:50.92 0.1 negative manual P 181 0.3058 141 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.JOPP.HHE. ML:1.8 0.0001076841 0.2048 AML other m 2020-04-04T20:37:58.46
IV.JOPP.HHN. ML:1.8 0.00010443431 0.1024 AML other m 2020-04-04T20:37:59.32
IV.CAR1.HHE. ML:1.6 5.8230385E-5 1.8816 AML other m 2020-04-04T20:38:01.26
IV.CAR1.HHN. ML:1.6 7.005202E-5 1.7024 AML other m 2020-04-04T20:38:00.44
IV.SPS2.HHE. ML:1 1.32518435E-5 0.1792 AML other m 2020-04-04T20:38:02.53
IV.SPS2.HHN. ML:1 1.470532E-5 0.2304 AML other m 2020-04-04T20:38:04.16
IV.CET2.HHE. ML:1.7 5.6921145E-5 0.1792 AML other m 2020-04-04T20:38:05.24
IV.CET2.HHN. ML:2 0.0001202772 0.2432 AML other m 2020-04-04T20:38:04.44
IV.VCRE.HHE. ML:3.2 0.000293451 0.9856 AML other m 2020-04-04T20:38:26.99
IV.VCRE.HHN. ML:3 0.0001929863 0.5248 AML other m 2020-04-04T20:38:47.19
IV.CIMA.HNE. ML:4.4 0.00064329285 0.4864 AML other m 2020-04-04T20:38:55.16
IV.CIMA.HNN. ML:4.5 0.0008058478 0.5376 AML other m 2020-04-04T20:39:39.70
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download