Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 06-10-2021 and time 02:36:20 (Italy) in region 6 km NW Sperlinga (EN)

A magnitude ML 1.6 earthquake occured in region: 6 km NW Sperlinga (EN), on

  • 06-10-2021 00:36:20 (UTC)
  • 06-10-2021 02:36:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8180, 14.3250 at 5 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
Sperlinga EN 6 805 805
Castel di Lucio ME 8 1294 2099
Nicosia EN 10 13899 15998
Gangi PA 11 6811 22809
Mistretta ME 13 4791 27600
Capizzi ME 14 3176 30776
Geraci Siculo PA 16 1945 32721
Cerami EN 16 2006 34727
San Mauro Castelverde PA 16 1701 36428
Pettineo ME 17 1350 37778
Reitano ME 18 806 38584
Motta d'Affermo ME 18 739 39323
Petralia Soprana PA 19 3360 42683

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NE of Caltanissetta (63360 inhabitants)
76 Km W of Catania (314555 inhabitants)
77 Km E of Bagheria (55387 inhabitants)
78 Km W of Acireale (52622 inhabitants)
84 Km N of Gela (75827 inhabitants)
86 Km NE of Agrigento (59770 inhabitants)
91 Km E of Palermo (674435 inhabitants)
98 Km N of Vittoria (63339 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 1.6 2021-10-06
00:36:20		 37.8177 14.325 5 2022-03-30
13:04:13		 Bollettino Sismico Italiano INGV 96905691
Reviewed
Rev100 		ML 2.0 2021-10-06
00:36:20		 37.8132 14.3305 6 2021-10-06
01:06:39		 Sala Sismica INGV-Roma 96275691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-06 00:36:20 ± 0.12
Latitude 37.8177 ± 0.0081
Longitude 14.3250 ± 0.0080
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96905691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 860
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.21854
Epicentral distance of station farthest from the epicenter (degree) 0.71496
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 96905691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 10:14:35

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 96275691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-06 01:06:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-10-06T00:36:38.48 0.6 undecidable manual S 62 54.1014 50 -0.35 45
IV.EPZF.HHZ. 2021-10-06T00:36:37.30 0.6 undecidable manual S 89 46.62 50 0.48 45
IV.MCPD.HHZ. 2021-10-06T00:36:36.93 0.6 undecidable manual S 47 48.8178 50 -0.48 44
IV.IACL.HHZ. 2021-10-06T00:36:35.53 0.3 undecidable manual P 2 79.365 50 0.5 63
IV.HVZN.HHZ. 2021-10-06T00:36:34.81 0.1 undecidable manual P 154 78.7656 50 -0.12 91
IV.EPIT.HHZ. 2021-10-06T00:36:33.43 0.6 undecidable manual P 90 64.0914 50 0.76 39
IV.MSFR.HHZ. 2021-10-06T00:36:32.92 0.6 undecidable manual S 44 33.4443 99 0.55 45
IV.GIB.HHE. 2021-10-06T00:36:32.30 0.6 undecidable manual S 306 32.4453 99 0.28 48
IV.EMSG.HHZ. 2021-10-06T00:36:31.78 0.3 undecidable manual P 89 54.7008 50 0.55 64
IV.MUCR.HHZ. 2021-10-06T00:36:30.45 0.3 undecidable manual P 62 54.1014 50 -0.68 61
IV.ALJA.HHZ. 2021-10-06T00:36:30.21 0.3 undecidable manual P 262 50.7159 50 -0.39 68
IV.MCPD.HHZ. 2021-10-06T00:36:30.04 0.1 undecidable manual P 47 48.8178 50 -0.28 93
IV.EPZF.HHZ. 2021-10-06T00:36:30.31 0.1 undecidable manual P 89 46.62 50 0.34 92
IV.CSLB.HHZ. 2021-10-06T00:36:30.13 0.6 undecidable manual S 300 26.9508 101 0 51
IV.ESCV.HHZ. 2021-10-06T00:36:29.31 0.6 undecidable manual P 100 43.7229 97 -0.12 48
IV.GALF.HHZ. 2021-10-06T00:36:29.03 0.6 undecidable manual S 119 24.2535 102 -0.2 49
MN.VAE.HHZ. 2021-10-06T00:36:29.96 0.6 undecidable manual P 176 38.7279 98 1.51 28
IV.MSFR.HHZ. 2021-10-06T00:36:27.36 0.1 undecidable manual P 44 33.4443 99 -0.05 100
IV.GIB.HHE. 2021-10-06T00:36:27.45 0.3 undecidable manual P 306 32.4453 99 0.25 72
IV.RESU.HHZ. 2021-10-06T00:36:26.80 0.3 undecidable manual P 231 30.2475 100 0.04 76
IV.CSLB.HHZ. 2021-10-06T00:36:25.71 0.1 undecidable manual P 300 26.9508 101 -0.4 94
IV.GALF.HHZ. 2021-10-06T00:36:25.06 0.1 positive manual P 119 24.2535 102 -0.53 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.1 0.000903844 0.3 AML other m 2021-10-06T00:36:30.61
IV.GALF.HHN. ML:2.3 0.001445 0.36 AML other m 2021-10-06T00:36:30.87
IV.GALF.HNN. ML:1.5 0.00020148545000000002 0.36 AML other m 2021-10-06T00:36:30.87
IV.CSLB.HHE. ML:0.9 0.000047727955 0.48 AML other m 2021-10-06T00:36:31.27
IV.RESU.HHE. ML:1.5 0.000145963 0.02 AML other m 2021-10-06T00:36:32.86
IV.MSFR.HHN. ML:1.3 0.00008751393 0.96 AML other m 2021-10-06T00:36:33.03
IV.MSFR.HHE. ML:1.2 0.000066408015 0.22 AML other m 2021-10-06T00:36:33.08
IV.ESCV.HHN. ML:1.7 0.00015262029999999998 0.3 AML other m 2021-10-06T00:36:36.04
IV.MCPD.HHN. ML:1.3 0.000055589895 0.4 AML other m 2021-10-06T00:36:37.36
IV.MCPD.HHE. ML:1.5 0.00007865513 0.44 AML other m 2021-10-06T00:36:37.75
IV.EPZF.HHE. ML:1.6 0.00010712245 0.76 AML other m 2021-10-06T00:36:37.72
IV.EPZF.HHN. ML:1.7 0.00014487345000000002 0.88 AML other m 2021-10-06T00:36:37.81
IV.ALJA.HHN. ML:1.2 0.00003927959 1.34 AML other m 2021-10-06T00:36:40.10
IV.MUCR.HHN. ML:1.7 0.0001197179 0.96 AML other m 2021-10-06T00:36:39.61
IV.ALJA.HHE. ML:1.5 0.00008639370999999999 1.04 AML other m 2021-10-06T00:36:40.19
IV.MUCR.HHE. ML:1.9 0.0001932685 0.7 AML other m 2021-10-06T00:36:39.91
IV.HVZN.HHE. ML:2.6 0.000543 0.96 AML other m 2021-10-06T00:36:47.98
IV.HVZN.HNE. ML:2.6 0.0005457766 1.02 AML other m 2021-10-06T00:36:48.49
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
Waveforms Seismic signals in miniseed + resp format Download