Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 20-10-2021 and time 20:48:41 (Italy) in region 3 km S Acri (CS)

A magnitude ML 1.0 earthquake occured in region: 3 km S Acri (CS), on

  • 20-10-2021 18:48:41 (UTC)
  • 20-10-2021 20:48:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.4650, 16.3900 at 10 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 3 20858 20858
Luzzi CS 9 9396 30254
Bisignano CS 10 10203 40457
Santa Sofia d'Epiro CS 11 2628 43085
Rose CS 11 4373 47458
San Demetrio Corone CS 12 3559 51017
San Cosmo Albanese CS 14 591 51608
San Giorgio Albanese CS 14 1432 53040
Vaccarizzo Albanese CS 14 1125 54165
San Pietro in Guarano CS 15 3663 57828
Castiglione Cosentino CS 15 2896 60724
Lappano CS 17 941 61665
Celico CS 18 2802 64467
Rovito CS 18 3158 67625
Corigliano Calabro CS 19 40427 108052
Zumpano CS 19 2570 110622
Longobucco CS 19 3183 113805
Spezzano della Sila CS 19 4541 118346
Spezzano Piccolo CS 20 2079 120425
Tarsia CS 20 2054 122479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Cosenza (67546 inhabitants)
55 Km N of Lamezia Terme (70714 inhabitants)
65 Km N of Catanzaro (90612 inhabitants)
76 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 1.0 2021-10-20
18:48:41		 39.4647 16.3902 10 2021-10-20
19:05:55		 Sala Sismica INGV-Roma 96807211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 18:48:41 ± 0.11
Latitude 39.4647 ± 0.0063
Longitude 16.3902 ± 0.0082
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96807211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 748
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48653
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96807211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 19:05:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GSCL.HHZ. 2021-10-20T18:50:15.41 3.0 undecidable manual Pn -1.5 0
IV.CPGN.HNZ. 2021-10-20T18:50:10.58 3.0 undecidable manual Pg 10.51 0
IV.FIR.HHZ. 2021-10-20T18:50:08.80 3.0 undecidable manual Pn 2.19 0
IV.CRTC.HHZ. 2021-10-20T18:50:02.62 3.0 undecidable manual Pn 6.08 0
IV.MNTT.EHZ. 2021-10-20T18:49:49.38 3.0 positive manual Pn 4.84 0
IV.IOCA.HHZ. 2021-10-20T18:49:49.18 3.0 undecidable manual Sn 1.42 0
IV.CMIS.HHZ. 2021-10-20T18:49:43.87 3.0 undecidable manual Sn -1.47 0
IV.GIUL.HHZ. 2021-10-20T18:49:38.55 3.0 positive manual Pg 7.67 0
IV.EFIU.HHZ. 2021-10-20T18:49:35.71 3.0 undecidable manual Sn -2.03 0
IV.RESU.HHZ. 2021-10-20T18:49:27.52 3.0 positive manual Pg 5.19 0
IV.CMPR.HHZ. 2021-10-20T18:49:21.19 3.0 undecidable manual S 0.32 0
MN.TIP.HHZ. 2021-10-20T18:48:55.93 0.6 undecidable manual S 135 44.7219 50 -0.2 46
IV.CET2.HHZ. 2021-10-20T18:48:54.16 0.3 undecidable manual S 281 37.9287 50 -0.17 71
IV.PIPA.HHZ. 2021-10-20T18:48:53.83 0.3 undecidable manual S 86 36.5412 50 -0.12 72
IV.SERS.HHZ. 2021-10-20T18:48:51.81 0.1 undecidable manual P 152 54.0015 50 0.39 88
IV.CAR1.HHZ. 2021-10-20T18:48:51.43 0.6 undecidable manual S 213 28.0497 50 -0.24 47
MN.TIP.HHZ. 2021-10-20T18:48:50.05 0.1 undecidable manual P 135 44.7219 50 0.06 96
IV.SPS2.HHZ. 2021-10-20T18:48:49.24 0.6 undecidable manual S 193 19.7691 118 -0.09 50
IV.TDS.HHZ. 2021-10-20T18:48:49.99 0.6 undecidable manual S 348 22.1556 115 -0.08 50
IV.PIPA.HHZ. 2021-10-20T18:48:48.54 1.0 positive manual P 86 36.5412 50 -0.18 24
IV.CET2.HHZ. 2021-10-20T18:48:48.96 0.1 positive manual P 281 37.9287 50 0.02 98
IV.CAR1.HHZ. 2021-10-20T18:48:47.37 0.6 negative manual P 213 28.0497 50 -0.04 49
IV.CELI.HHE. 2021-10-20T18:48:46.37 0.3 undecidable manual S 124 12.2766 130 -0.8 61
IV.SPS2.HHZ. 2021-10-20T18:48:46.12 0.1 negative manual P 193 19.7691 118 0.06 100
IV.TDS.HHZ. 2021-10-20T18:48:46.50 1.0 positive manual P 348 22.1556 115 0.01 25
IV.CELI.HHE. 2021-10-20T18:48:45.44 0.1 undecidable manual P 124 12.2766 130 0.63 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SPS2.HHN. ML:1.0 0.00007975 0.14 AML other m 2021-10-20T18:48:49.34
IV.SPS2.HHE. ML:0.9 0.0000651 0.92 AML other m 2021-10-20T18:48:49.97
IV.CAR1.HHN. ML:1.1 0.00007235 1.24 AML other m 2021-10-20T18:48:52.29
IV.CAR1.HHE. ML:1.0 0.000050100000000000005 0.3 AML other m 2021-10-20T18:48:52.17
IV.CET2.HHE. ML:1.3 0.00008175 0.12 AML other m 2021-10-20T18:48:55.09
IV.CET2.HHN. ML:1.5 0.000125 0.46 AML other m 2021-10-20T18:48:55.49
IV.PIPA.HHE. ML:1.0 0.000034149999999999997 0.26 AML other m 2021-10-20T18:48:58.39
IV.PIPA.HHN. ML:0.8 0.000027199999999999997 0.62 AML other m 2021-10-20T18:48:58.60
IV.TDS.HHE. ML:0.2 0.000008038129 0.1792 AML other m 2021-10-20T18:48:51.59
IV.TDS.HHN. ML:0.2 0.000011426782999999999 0.1408 AML other m 2021-10-20T18:48:51.48
IV.CAR1.HNE. ML:1.1 0.00007244893499999999 0.3712 AML other m 2021-10-20T18:48:52.57
IV.CAR1.HNN. ML:1.1 0.00007123196000000001 0.2176 AML other m 2021-10-20T18:48:51.80
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