Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-10-2021 and time 23:06:53 (Italy) in region 6 km SE Acri (CS)

A magnitude ML 1.1 earthquake occured in region: 6 km SE Acri (CS), on

  • 20-10-2021 21:06:53 (UTC)
  • 20-10-2021 23:06:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.4570, 16.4430 at 24 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
Acri CS 6 20858 20858
Luzzi CS 13 9396 30254
San Giorgio Albanese CS 14 1432 31686
Rose CS 14 4373 36059
Santa Sofia d'Epiro CS 14 2628 38687
San Demetrio Corone CS 14 3559 42246
San Cosmo Albanese CS 14 591 42837
Longobucco CS 14 3183 46020
Vaccarizzo Albanese CS 15 1125 47145
Bisignano CS 15 10203 57348
San Pietro in Guarano CS 17 3663 61011
Corigliano Calabro CS 17 40427 101438
Castiglione Cosentino CS 18 2896 104334
Celico CS 18 2802 107136
Lappano CS 19 941 108077
Rovito CS 19 3158 111235
Spezzano della Sila CS 20 4541 115776

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NE of Cosenza (67546 inhabitants)
55 Km N of Lamezia Terme (70714 inhabitants)
63 Km N of Catanzaro (90612 inhabitants)
72 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
Reviewed
Rev100 		ML 1.1 2021-10-20
21:06:53		 39.4572 16.4432 24 2021-10-20
21:15:12		 Sala Sismica INGV-Roma 96811561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 21:06:53 ± 0.12
Latitude 39.4572 ± 0.0072
Longitude 16.4432 ± 0.0082
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96811561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 728
Semi-minor axis of confidence ellipse (meter) 449
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 1.22667
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 96811561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 21:15:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2021-10-20T21:07:16.14 0.1 undecidable manual P 315 136.1637 54 0.38 82
IV.JOPP.HHE. 2021-10-20T21:07:11.61 0.6 undecidable manual P 207 105.8163 98 0.37 44
IV.CET2.HHZ. 2021-10-20T21:07:08.26 0.6 undecidable manual S 281 42.5241 112 0.36 50
MN.TIP.HHZ. 2021-10-20T21:07:07.88 0.6 undecidable manual S 139 41.0256 113 0.38 50
IV.CAR1.HHZ. 2021-10-20T21:07:05.13 0.6 undecidable manual S 221 30.1476 122 0.2 53
IV.PIPA.HHZ. 2021-10-20T21:07:05.86 0.6 undecidable manual S 84 32.0457 120 0.49 49
IV.GRIS.EHZ. 2021-10-20T21:07:04.12 0.6 positive manual P 302 59.3961 105 -0.1 51
IV.SPS2.HHZ. 2021-10-20T21:07:03.13 0.6 undecidable manual S 206 20.4684 134 0.23 53
IV.TDS.HHZ. 2021-10-20T21:07:03.53 0.6 undecidable manual S 338 24.2535 129 -0.13 54
IV.SELL.HHE. 2021-10-20T21:07:03.27 0.6 undecidable manual P 163 54.9006 107 -0.28 49
IV.SERS.HHZ. 2021-10-20T21:07:02.75 0.3 undecidable manual P 156 51.3153 108 -0.26 75
MN.TIP.HHZ. 2021-10-20T21:07:01.20 0.3 positive manual P 139 41.0256 113 -0.33 75
IV.CET2.HHZ. 2021-10-20T21:07:01.43 0.1 undecidable manual P 281 42.5241 112 -0.32 100
IV.CELI.HHZ. 2021-10-20T21:07:01.28 0.6 undecidable manual S 137 8.2806 159 0.2 55
IV.CAR1.HHZ. 2021-10-20T21:07:00.16 0.6 negative manual P 221 30.1476 122 0.11 54
IV.PIPA.HHZ. 2021-10-20T21:07:00.07 0.3 undecidable manual P 84 32.0457 120 -0.23 78
IV.TDS.HHZ. 2021-10-20T21:06:59.02 0.6 undecidable manual P 338 24.2535 129 -0.28 52
IV.SPS2.HHZ. 2021-10-20T21:06:58.70 0.3 positive manual P 206 20.4684 134 -0.17 80
IV.CELI.HHZ. 2021-10-20T21:06:57.84 0.3 undecidable manual P 137 8.2806 159 0.02 85
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CELI.HHE. ML:0.8 0.000039349999999999994 1.3 AML other m 2021-10-20T21:07:02.33
IV.SPS2.HHE. ML:1.2 0.00006765 0.34 AML other m 2021-10-20T21:07:03.89
IV.SPS2.HHN. ML:1.2 0.00007322031 0.384 AML other m 2021-10-20T21:07:03.47
IV.TDS.HHN. ML:1.1 0.0000592 0.48 AML other m 2021-10-20T21:07:04.52
IV.TDS.HHE. ML:1.0 0.00004352934 0.4096 AML other m 2021-10-20T21:07:04.08
IV.CELI.HHN. ML:0.9 0.00004825 0.3 AML other m 2021-10-20T21:07:04.83
IV.CAR1.HHN. ML:1.4 0.000107309195 0.2944 AML other m 2021-10-20T21:07:06.79
IV.CAR1.HHE. ML:1.0 0.000041946394999999995 0.2944 AML other m 2021-10-20T21:07:08.59
IV.CET2.HHN. ML:1.5 0.000093507485 0.3456 AML other m 2021-10-20T21:07:09.75
IV.CET2.HHE. ML:1.2 0.000040327109999999996 0.4224 AML other m 2021-10-20T21:07:09.39
IV.SERS.HHE. ML:0.8 0.000017109069999999996 0.384 AML other m 2021-10-20T21:07:11.80
IV.GRIS.EHN. ML:1.0 0.000020549999999999998 0.5 AML other m 2021-10-20T21:07:14.60
IV.SERS.HHN. ML:1.0 0.0000239 0.36 AML other m 2021-10-20T21:07:14.36
IV.GRIS.EHE. ML:1.0 0.000022437192 0.6144 AML other m 2021-10-20T21:07:16.18
IV.CELI.HNE. ML:0.8 0.000038702802000000004 0.3072 AML other m 2021-10-20T21:07:03.92
IV.CELI.HNN. ML:0.7 0.0000340455415 0.4096 AML other m 2021-10-20T21:07:02.48
IV.CAR1.HNE. ML:1.3 0.00007871619 0.2688 AML other m 2021-10-20T21:07:06.72
IV.CAR1.HNN. ML:1.4 0.000106471405 0.32 AML other m 2021-10-20T21:07:06.94
MN.TIP.HHE. ML:0.7 0.000014053695 0.3968 AML other m 2021-10-20T21:07:08.33
MN.TIP.HHN. ML:0.5 0.000010183423000000001 0.8576 AML other m 2021-10-20T21:07:18.62
MN.TIP.HNE. ML:1.3 0.000059156755000000006 1.0496 AML other m 2021-10-20T21:07:04.58
MN.TIP.HNN. ML:1.4 0.00007146806 0.8448 AML other m 2021-10-20T21:07:13.52
IV.SERS.HNE. ML:1.2 0.00003286439 0.6144 AML other m 2021-10-20T21:07:24.50
IV.SERS.HNN. ML:1.1 0.000028124819999999997 0.7424 AML other m 2021-10-20T21:07:09.35
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