Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 04-04-2020 and time 11:35:47 (UTC) in region Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria)

A magnitude ML 1.1 earthquake occured in region: Costa Calabra sud occidentale (Catanzaro, Vibo Valentia, Reggio di Calabria), on

  • 04-04-2020 11:35:47 (UTC)
  • 04-04-2020 13:35:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.0450, 16.0020 at 20 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.

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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
Amantea CS 12 13975 13975
Serra d'Aiello CS 12 458 14433
San Pietro in Amantea CS 14 505 14938
Nocera Terinese CZ 14 4731 19669
Belmonte Calabro CS 15 2003 21672
Falerna CZ 15 4028 25700
Cleto CS 16 1301 27001
San Mango d'Aquino CZ 16 1564 28565
Aiello Calabro CS 17 1729 30294
Lago CS 19 2624 32918
Gizzeria CZ 19 4982 37900
Longobardi CS 19 2312 40212

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of Lamezia Terme (70714 inhabitants)
35 Km SW of Cosenza (67546 inhabitants)
54 Km W of Catanzaro (90612 inhabitants)
97 Km W of Crotone (62178 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 		ML 1.1 2020-04-04
11:35:47		 39.0447 16.0018 20 2020-07-18
21:08:40		 Bollettino Sismico Italiano INGV 80230571
Reviewed
Rev100 		ML 1.1 2020-04-04
11:35:47		 39.0468 15.9657 11 2020-04-04
11:50:59		 Sala Sismica INGV-Roma 77869451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-04 11:35:47 ± 0.14
Latitude 39.0447 ± 0.0045
Longitude 16.0018 ± 0.0104
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80230571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 770
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.17267
Epicentral distance of station farthest from the epicenter (degree) 0.53150
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 80230571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-16 10:35:58

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 77869451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 11:50:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CET2.HHZ. 2020-04-04T11:36:04.21 0.3 undecidable manual S 356 53.9016 102 -0.11 72
IV.JOPP.HHZ. 2020-04-04T11:36:02.99 0.6 undecidable manual S 192 49.617 103 -0.22 47
IV.SPS2.HHZ. 2020-04-04T11:36:00.53 0.6 undecidable manual S 47 39.8268 107 -0.16 49
IV.CAR1.HHZ. 2020-04-04T11:35:58.18 0.6 undecidable manual S 38 29.3484 114 0.12 49
IV.CET2.HHZ. 2020-04-04T11:35:57.24 1.0 undecidable manual P 356 53.9016 102 0.13 23
IV.CELI.HHE. 2020-04-04T11:35:57.73 0.3 undecidable manual P 47 58.9965 100 -0.15 70
IV.JOPP.HHZ. 2020-04-04T11:35:56.58 0.3 undecidable manual P 192 49.617 103 0.11 71
XK.GIZZ.HHZ. 2020-04-04T11:35:55.54 0.6 undecidable manual S 112 19.1697 128 -0.19 50
IV.SPS2.HHZ. 2020-04-04T11:35:54.92 0.1 undecidable manual P 47 39.8268 107 -0.09 98
IV.CAR1.HHZ. 2020-04-04T11:35:53.76 0.1 undecidable manual P 38 29.3484 114 0.26 95
XK.GIZZ.HHZ. 2020-04-04T11:35:52.28 0.1 positive manual P 112 19.1697 128 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAR1.HHN. ML:1.1 0.000048345155 0.1408 AML other m 2020-04-04T11:35:58.64
IV.CAR1.HHE. ML:1.1 0.000056886975 0.1984 AML other m 2020-04-04T11:35:58.59
IV.CAR1.HNE. ML:1.5 0.0001404513 1.3088 AML other m 2020-04-04T11:35:58.24
IV.CAR1.HNN. ML:1.4 0.000107897935 0.88 AML other m 2020-04-04T11:35:59.01
IV.SPS2.HHE. ML:0.2 0.000007049998 0.1408 AML other m 2020-04-04T11:36:01.08
IV.SPS2.HHN. ML:0.5 0.000012354489 1.584 AML other m 2020-04-04T11:36:01.00
IV.JOPP.HHN. ML:1.1 0.00002879611 0.7808 AML other m 2020-04-04T11:36:03.40
IV.JOPP.HHE. ML:0.9 0.000022279964999999998 1.8208 AML other m 2020-04-04T11:36:04.92
IV.CET2.HHE. ML:1.2 0.000042431294999999994 0.5024 AML other m 2020-04-04T11:36:04.76
IV.CET2.HHN. ML:1.3 0.000046663895 0.2432 AML other m 2020-04-04T11:36:05.09
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download