Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-08-2021 and time 20:00:02 (Italy) in region 3 km E Guardia Piemontese (CS)

A magnitude ML 1.5 earthquake occured in region: 3 km E Guardia Piemontese (CS), on

  • 20-08-2021 18:00:02 (UTC)
  • 20-08-2021 20:00:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.4710, 16.0300 at 58 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
Guardia Piemontese CS 3 1911 1911
Fuscaldo CS 6 8140 10051
Acquappesa CS 7 1907 11958
San Martino di Finita CS 7 1100 13058
Rota Greca CS 7 1156 14214
Cerzeto CS 8 1373 15587
Cetraro CS 9 10128 25715
Lattarico CS 9 4013 29728
San Benedetto Ullano CS 9 1555 31283
Mongrassano CS 10 1607 32890
Fagnano Castello CS 10 3885 36775
Torano Castello CS 11 4614 41389
Cervicati CS 12 829 42218
San Marco Argentano CS 12 7424 49642
Paola CS 12 16013 65655
Montalto Uffugo CS 13 19669 85324
Santa Caterina Albanese CS 13 1222 86546
Malvito CS 15 1795 88341
San Vincenzo La Costa CS 16 2195 90536
Bonifati CS 17 2858 93394
Sant'Agata di Esaro CS 17 1890 95284
San Fili CS 18 2719 98003
Sangineto CS 18 1338 99341
San Lucido CS 18 6047 105388
Roggiano Gravina CS 20 7208 112596
Mottafollone CS 20 1236 113832

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Cosenza (67546 inhabitants)
60 Km NW of Lamezia Terme (70714 inhabitants)
79 Km NW of Catanzaro (90612 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 1.5 2021-08-20
18:00:02		 39.4712 16.0305 58 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 98138791
Reviewed
Rev100 		ML 1.3 2021-08-20
18:00:04		 39.6557 16.4163 10 2021-08-20
18:32:59		 Sala Sismica INGV-Roma 94436781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-20 18:00:02 ± 0.23
Latitude 39.4712 ± 0.0108
Longitude 16.0305 ± 0.0175
Depth (km) 58 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98138791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1550
Semi-minor axis of confidence ellipse (meter) 651
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 1550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.87144
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 98138791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-04 17:50:58

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 94436781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-20 18:32:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SAMA.EHZ. 2021-08-20T18:01:48.09 3.0 undecidable manual Sg 5.45 0
IV.STAL.HNZ. 2021-08-20T18:01:45.83 3.0 undecidable manual Pn -3.66 0
IV.MOCL.EHZ. 2021-08-20T18:01:45.54 3.0 positive manual Pg 14.36 0
IV.OSSC.HHZ. 2021-08-20T18:01:41.37 3.0 undecidable manual Pg 15.41 0
IV.CRJA.HHZ. 2021-08-20T18:01:29.32 3.0 undecidable manual Sg -0.43 0
IV.POFI.HHZ. 2021-08-20T18:01:27.16 3.0 undecidable manual Sg 0.77 0
IV.ARVD.HHZ. 2021-08-20T18:01:22.98 3.0 undecidable manual Pg 8.13 0
IV.GIUL.HHZ. 2021-08-20T18:01:20.53 3.0 undecidable manual Sn -9.24 0
IV.PIEI.HHZ. 2021-08-20T18:01:17.48 3.0 negative manual Pn -0.13 0
IV.PESA.HHZ. 2021-08-20T18:01:13.23 3.0 undecidable manual Pn -7.28 0
OT.OT05.EHZ. 2021-08-20T18:01:08.86 3.0 undecidable manual Sg 0.89 0
IV.MURB.HHZ. 2021-08-20T18:01:08.99 3.0 positive manual Pn -5.72 0
CR.STON.BHZ. 2021-08-20T18:01:06.26 3.0 undecidable manual Pg 8.04 0
IV.VBKN.HHZ. 2021-08-20T18:01:02.75 3.0 undecidable manual Sg 1.01 0
IV.SGTA.HHZ. 2021-08-20T18:00:48.23 3.0 undecidable manual S -8.07 0
IV.SGTA.HHZ. 2021-08-20T18:00:48.17 3.0 undecidable manual P 1.384 0
IV.PZUN.HHZ. 2021-08-20T18:00:43.88 3.0 undecidable manual Sg 0.67 0
AC.VLO.HHZ. 2021-08-20T18:00:43.65 3.0 negative manual Pn -2.25 0
IX.PGN3.HHZ.02 2021-08-20T18:00:39.68 3.0 undecidable manual Sg -1.91 0
IV.EPZF.HHZ. 2021-08-20T18:00:33.90 3.0 undecidable manual Pn -4.02 0
IV.JOPP.HNN. 2021-08-20T18:00:31.80 0.6 undecidable manual S 187 96.7254 109 0.17 43
IV.MGR.HHZ. 2021-08-20T18:00:29.20 0.6 undecidable manual S 331 84.3489 113 0.04 45
IV.SERS.HHZ. 2021-08-20T18:00:28.05 0.6 undecidable manual S 130 74.37 117 0.85 36
IV.PIPA.HHZ. 2021-08-20T18:00:25.47 0.6 undecidable manual S 88 67.2771 120 -0.39 44
MN.CUC.HHZ. 2021-08-20T18:00:24.14 0.3 undecidable manual S 343 60.7947 124 -0.54 64
IV.SLCN.HHZ. 2021-08-20T18:00:24.36 3.0 undecidable manual Pg 0.27 0
IV.CELI.HNZ. 2021-08-20T18:00:22.50 0.6 undecidable manual S 100 41.625 137 0.98 34
IV.TDS.HHZ. 2021-08-20T18:00:20.97 0.6 undecidable manual S 51 33.6441 144 0.56 41
IV.JOPP.HNN. 2021-08-20T18:00:20.05 0.3 undecidable manual P 187 96.7254 109 0.61 60
IV.GRIS.EHZ. 2021-08-20T18:00:20.48 0.6 undecidable manual S 333 33.5442 144 0.09 48
IV.CAR1.HHZ. 2021-08-20T18:00:19.47 0.3 undecidable manual S 147 28.749 148 -0.35 69
IV.CET2.HHZ. 2021-08-20T18:00:18.34 0.6 undecidable manual S 315 9.0798 169 0.06 51
IV.MGR.HHZ. 2021-08-20T18:00:18.18 0.3 undecidable manual P 331 84.3489 113 0.17 66
IV.SCHR.EHN. 2021-08-20T18:00:18.52 0.3 undecidable manual P 3 80.8635 114 0.9 51
IV.SERS.HHZ. 2021-08-20T18:00:16.72 0.1 undecidable manual P 130 74.37 117 -0.17 88
MN.TIP.HHZ. 2021-08-20T18:00:16.06 0.3 undecidable manual P 117 70.374 119 -0.38 64
IV.PIPA.HHZ. 2021-08-20T18:00:15.44 0.3 undecidable manual P 88 67.2771 120 -0.67 60
MN.CUC.HHZ. 2021-08-20T18:00:15.23 0.3 undecidable manual P 343 60.7947 124 -0.2 68
IV.CELI.HNZ. 2021-08-20T18:00:13.61 0.1 undecidable manual P 100 41.625 137 0 97
IV.GRIS.EHZ. 2021-08-20T18:00:12.99 0.1 undecidable manual P 333 33.5442 144 0.03 99
IV.TDS.HHZ. 2021-08-20T18:00:12.79 0.3 undecidable manual P 51 33.6441 144 -0.17 72
IV.CAR1.HHZ. 2021-08-20T18:00:12.37 0.1 undecidable manual P 147 28.749 148 -0.25 94
IV.CET2.HHZ. 2021-08-20T18:00:11.92 0.1 undecidable manual P 315 9.0798 169 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CET2.HHE. ML:1.5 0.0000741 0.9 AML other m 2021-08-20T18:00:18.54
IV.CET2.HHN. ML:2.0 0.000195 0.46 AML other m 2021-08-20T18:00:18.61
IV.GRIS.EHE. ML:1.4 0.00004375 1.32 AML other m 2021-08-20T18:00:20.10
IV.GRIS.EHN. ML:1.6 0.0000646 0.12 AML other m 2021-08-20T18:00:20.84
IV.CAR1.HHN. ML:1.4 0.0000441 0.3 AML other m 2021-08-20T18:00:23.29
IV.CAR1.HHE. ML:1.2 0.00003204999999999999 0.74 AML other m 2021-08-20T18:00:26.01
IV.SLCN.HHE. ML:1.7 0.00003845 0.74 AML other m 2021-08-20T18:00:30.53
IV.SERS.HHE. ML:1.1 0.000016800000000000002 0.42 AML other m 2021-08-20T18:00:31.81
IV.SERS.HHN. ML:1.1 0.000015300000000000003 0.54 AML other m 2021-08-20T18:00:31.71
IV.SLCN.HHN. ML:1.8 0.000048700000000000005 0.98 AML other m 2021-08-20T18:00:43.03
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