Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 09-04-2021 and time 02:59:55 (Italy) in region 5 km SE Acri (CS)

A magnitude ML 1.2 earthquake occured in region: 5 km SE Acri (CS), on

  • 09-04-2021 00:59:55 (UTC)
  • 09-04-2021 02:59:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.4490, 16.4080 at 10 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
Acri CS 5 20858 20858
Luzzi CS 10 9396 30254
Rose CS 11 4373 34627
Bisignano CS 13 10203 44830
Santa Sofia d'Epiro CS 13 2628 47458
San Demetrio Corone CS 14 3559 51017
San Pietro in Guarano CS 14 3663 54680
Castiglione Cosentino CS 15 2896 57576
San Cosmo Albanese CS 15 591 58167
San Giorgio Albanese CS 15 1432 59599
Vaccarizzo Albanese CS 16 1125 60724
Celico CS 16 2802 63526
Lappano CS 16 941 64467
Rovito CS 17 3158 67625
Longobucco CS 17 3183 70808
Spezzano della Sila CS 18 4541 75349
Zumpano CS 18 2570 77919
Spezzano Piccolo CS 18 2079 79998
Corigliano Calabro CS 19 40427 120425
Casole Bruzio CS 19 2578 123003
Serra Pedace CS 20 986 123989
Trenta CS 20 2633 126622

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Cosenza (67546 inhabitants)
53 Km N of Lamezia Terme (70714 inhabitants)
62 Km N of Catanzaro (90612 inhabitants)
74 Km NW 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 1.2 2021-04-09
00:59:55		 39.4487 16.4083 10 2021-07-12
16:55:14		 Bollettino Sismico Italiano INGV 90804901
Reviewed
Rev100 		ML 1.2 2021-04-09
00:59:55		 39.4477 16.4028 11 2021-04-09
01:07:56		 Sala Sismica INGV-Roma 88925611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-09 00:59:55 ± 0.11
Latitude 39.4487 ± 0.0063
Longitude 16.4083 ± 0.0093
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90804901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 899
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.54679
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 90804901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-05 00:21:03

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88925611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-09 01:07:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GRIS.HNE. 2021-04-09T01:00:14.55 0.6 undecidable manual S 304 57.498 50 0.85 37
IV.LADO.EHZ. 2021-04-09T01:00:12.62 0.3 undecidable manual S 110 52.3032 50 0.3 67
IV.SERS.HHZ. 2021-04-09T01:00:12.00 0.3 undecidable manual S 152 51.7038 50 -0.18 69
IV.CET2.HHZ. 2021-04-09T01:00:08.99 0.3 undecidable manual S 283 39.8268 50 -0.02 73
IV.MMN.HHE. 2021-04-09T01:00:07.64 0.6 undecidable manual P 324 60.6948 50 1.1 33
IV.SELL.HHZ. 2021-04-09T01:00:06.36 0.3 undecidable manual P 160 55.0005 50 0.69 60
IV.GIZZ.HHN. 2021-04-09T01:00:05.95 0.3 undecidable manual P 198 54.8007 50 0.31 67
IV.GRIS.HNE. 2021-04-09T01:00:05.81 0.3 undecidable manual P 304 57.498 50 -0.24 68
IV.LADO.EHZ. 2021-04-09T01:00:04.73 0.3 undecidable manual P 110 52.3032 50 -0.52 64
IV.SERS.HHZ. 2021-04-09T01:00:04.78 0.1 undecidable manual P 152 51.7038 50 -0.39 88
IV.TDS.HHZ. 2021-04-09T01:00:04.55 0.3 undecidable manual S 346 24.2535 112 -0.09 74
IV.CET2.HHZ. 2021-04-09T01:00:03.03 0.3 undecidable manual P 283 39.8268 50 -0.31 69
IV.PIPA.HHZ. 2021-04-09T01:00:02.16 0.3 undecidable manual P 83 35.1426 50 -0.45 67
IV.SPS2.HHZ. 2021-04-09T01:00:02.60 0.3 undecidable manual S 199 18.4704 118 -0.22 73
IV.CELI.HHZ. 2021-04-09T01:00:00.70 0.3 undecidable manual S 121 9.9789 134 0.29 73
IV.TDS.HHZ. 2021-04-09T01:00:00.58 0.1 undecidable manual P 346 24.2535 112 -0.23 96
IV.SPS2.HHZ. 2021-04-09T00:59:59.70 0.1 undecidable manual P 199 18.4704 118 -0.07 100
IV.CELI.HHZ. 2021-04-09T00:59:58.69 0.1 undecidable manual P 121 9.9789 134 0.32 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CELI.HNE. ML:1.4 0.00035499999999999996 1.76 AML other m 2021-04-09T01:00:01.93
IV.CELI.HHE. ML:1.4 0.00035749999999999996 1.76 AML other m 2021-04-09T01:00:01.93
IV.CELI.HNN. ML:1.1 0.0001525 0.38 AML other m 2021-04-09T01:00:01.36
IV.CELI.HHN. ML:1.1 0.00014749999999999998 0.38 AML other m 2021-04-09T01:00:01.36
IV.SPS2.HHE. ML:1.1 0.00010570000000000001 0.42 AML other m 2021-04-09T01:00:02.75
IV.SPS2.HHN. ML:1.1 0.00009820000000000002 1.24 AML other m 2021-04-09T01:00:02.88
IV.TDS.HHE. ML:0.8 0.000036150000000000005 0.52 AML other m 2021-04-09T01:00:06.32
IV.TDS.HHN. ML:0.8 0.0000375 1.02 AML other m 2021-04-09T01:00:06.66
IV.CET2.HHN. ML:1.5 0.00011035 0.42 AML other m 2021-04-09T01:00:10.81
IV.PIPA.HHN. ML:1.3 0.00008625 0.2 AML other m 2021-04-09T01:00:11.38
IV.PIPA.HHE. ML:1.5 0.00011785 0.62 AML other m 2021-04-09T01:00:12.94
IV.CET2.HHE. ML:1.2 0.0000592 0.88 AML other m 2021-04-09T01:00:14.49
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