Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 28-09-2021 and time 21:40:23 (UTC) in region 4 km NW Gangi (PA)

A magnitude ML 2.3 earthquake occured in region: 4 km NW Gangi (PA), on

  • 28-09-2021 21:40:23 (UTC)
  • 28-09-2021 23:40:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8310, 14.1830 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gangi PA 4 6811 6811
Geraci Siculo PA 4 1945 8756
Petralia Soprana PA 8 3360 12116
Petralia Sottana PA 8 2821 14937
San Mauro Castelverde PA 10 1701 16638
Bompietro PA 12 1401 18039
Blufi PA 13 1029 19068
Castel di Lucio ME 13 1294 20362
Castellana Sicula PA 13 3411 23773
Castelbuono PA 14 8943 32716
Polizzi Generosa PA 16 3407 36123
Alimena PA 16 2032 38155
Sperlinga EN 17 805 38960
Tusa ME 18 2925 41885
Pettineo ME 18 1350 43235
Pollina PA 19 2974 46209
Mistretta ME 19 4791 51000
Motta d'Affermo ME 20 739 51739

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km N of Caltanissetta (63360 inhabitants)
65 Km E of Bagheria (55387 inhabitants)
78 Km NE of Agrigento (59770 inhabitants)
79 Km E of Palermo (674435 inhabitants)
85 Km N of Gela (75827 inhabitants)
88 Km W of Catania (314555 inhabitants)
90 Km W of Acireale (52622 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 2.3 2021-09-28
21:40:23		 37.8307 14.1832 5 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96342021
Reviewed
Rev100 		ML 2.3 2021-09-28
21:40:23		 37.8083 14.2008 6 2021-09-28
21:50:56		 Sala Sismica INGV-Roma 96009061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 21:40:23 ± 0.13
Latitude 37.8307 ± 0.0072
Longitude 14.1832 ± 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 96342021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 855
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
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) 38
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 1.17901
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 34
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 48
Type of magnitude ML
Reference to an origin 96342021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-08 17:16:40

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 50
Type of magnitude ML
Reference to an origin 96009061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 21:50:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSRU.HHZ. 2021-09-28T21:40:45.22 0.3 undecidable manual P 67 125.3745 50 -0.24 60
IV.MTGR.HHZ. 2021-09-28T21:40:45.73 0.6 undecidable manual P 274 124.8861 50 0.34 39
IV.USI.HHZ. 2021-09-28T21:40:44.74 0.3 undecidable manual P 318 130.869 50 -1.56 34
IV.CRJA.HHZ. 2021-09-28T21:40:43.34 0.6 undecidable manual P 269 103.3188 50 1.27 28
IV.MMGO.HHZ. 2021-09-28T21:40:43.51 0.6 undecidable manual P 260 107.5146 50 0.8 35
IV.SCIAC.HHZ. 2021-09-28T21:40:42.10 0.6 undecidable manual P 250 101.121 50 0.37 41
IV.MPNC.HHZ. 2021-09-28T21:40:42.54 0.3 undecidable manual P 71 108.114 50 -0.26 83
IV.IVPL.HHZ. 2021-09-28T21:40:40.42 0.1 undecidable manual P 49 92.241 50 0.07 89
IV.HVZN.HNZ. 2021-09-28T21:40:39.16 0.3 undecidable manual P 147 86.247 50 -0.27 65
IV.ECTS.HHZ. 2021-09-28T21:40:39.04 0.3 undecidable manual P 86 82.3509 50 0.21 66
IV.MSFR.HHZ. 2021-09-28T21:40:38.73 0.6 undecidable manual S 58 42.2244 96 0.09 49
IV.EPIT.HHZ. 2021-09-28T21:40:38.57 0.6 undecidable manual P 91 76.5678 50 0.63 40
IV.CLTA.HHN. 2021-09-28T21:40:38.06 0.6 undecidable manual P 195 77.0673 50 0.04 46
IV.IACL.HHZ. 2021-09-28T21:40:38.33 0.3 undecidable manual P 11 79.365 50 -0.04 69
IV.MPG.HHZ. 2021-09-28T21:40:38.29 0.3 undecidable manual P 297 80.7636 50 -0.3 65
IV.SCIAR.HHZ. 2021-09-28T21:40:38.15 0.6 undecidable manual S 288 39.9267 97 0.32 47
IV.EMSG.HHZ. 2021-09-28T21:40:37.29 0.3 undecidable manual P 91 67.1772 50 0.8 57
IV.EMPL.HHZ. 2021-09-28T21:40:37.96 0.6 undecidable manual P 103 71.0733 50 0.87 36
IV.RAFF.HHZ. 2021-09-28T21:40:36.32 0.3 undecidable manual P 167 69.2751 50 -0.5 64
IV.SOLUN.HHZ. 2021-09-28T21:40:35.07 0.3 undecidable manual P 297 63.8916 50 -0.91 54
IV.CMDO.HHZ. 2021-09-28T21:40:35.20 0.1 undecidable manual P 218 51.5151 50 1.12 67
IV.MUCR.HHZ. 2021-09-28T21:40:35.39 0.3 undecidable manual P 68 64.8906 50 -0.75 58
IV.GALF.HHZ. 2021-09-28T21:40:35.94 0.6 undecidable manual S 111 36.1416 97 -0.6 43
IV.EPZF.HHZ. 2021-09-28T21:40:35.55 0.3 undecidable manual P 91 58.9965 50 0.31 68
IV.MCPD.HHZ. 2021-09-28T21:40:34.59 0.3 undecidable manual P 56 57.6978 50 -0.43 66
IV.ESCV.HHZ. 2021-09-28T21:40:34.72 0.6 undecidable manual P 99 56.1993 50 -0.08 47
IV.MCT.HHN. 2021-09-28T21:40:34.47 0.6 undecidable manual P 245 55.6998 50 -0.26 46
IV.CPTP.HHZ. 2021-09-28T21:40:34.50 0.3 undecidable manual P 182 47.0196 96 1.15 50
MN.VAE.HHZ. 2021-09-28T21:40:34.32 0.3 undecidable manual P 160 42.8238 96 1.8 34
IV.GIB.HHZ. 2021-09-28T21:40:32.85 0.3 undecidable manual S 322 22.4553 102 1.02 56
IV.CAGR.HHE. 2021-09-28T21:40:32.24 0.3 undecidable manual P 130 36.1416 97 1.05 54
IV.PLLN.EHZ. 2021-09-28T21:40:31.27 0.3 undecidable manual S 349 18.2706 104 0.83 61
IV.SCIAR.HHZ. 2021-09-28T21:40:31.04 0.1 undecidable manual P 288 39.9267 97 -0.9 76
IV.RESU.HHZ. 2021-09-28T21:40:31.18 0.6 undecidable manual S 209 23.2545 101 -0.92 39
IV.MSFR.HHZ. 2021-09-28T21:40:31.88 0.1 undecidable manual P 58 42.2244 96 -0.52 88
IV.GALF.HHZ. 2021-09-28T21:40:30.82 0.1 undecidable manual P 111 36.1416 97 -0.37 93
IV.CSLB.HHZ. 2021-09-28T21:40:29.90 0.6 undecidable manual S 317 16.1727 106 0.18 50
IV.GIB.HHZ. 2021-09-28T21:40:28.14 0.1 positive manual P 322 22.4553 102 -0.33 96
IV.PLLN.EHZ. 2021-09-28T21:40:27.83 0.1 undecidable manual P 349 18.2706 104 0.16 100
IV.RESU.HHZ. 2021-09-28T21:40:27.59 0.1 undecidable manual P 209 23.2545 101 -1.04 73
IV.CSLB.HHZ. 2021-09-28T21:40:27.01 0.1 undecidable manual P 317 16.1727 106 -0.25 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.9 0.0008939999999999999 1.12 AML other m 2021-09-28T21:40:31.63
IV.CSLB.HHN. ML:2.1 0.0013599999999999999 0.86 AML other m 2021-09-28T21:40:31.69
IV.GIB.HHE. ML:2.6 0.002715 0.36 AML other m 2021-09-28T21:40:33.76
IV.PLLN.EHN. ML:2.2 0.0014849999999999998 0.52 AML other m 2021-09-28T21:40:34.94
IV.PLLN.EHE. ML:2.3 0.00185 1.56 AML other m 2021-09-28T21:40:34.98
IV.GIB.HHN. ML:2.6 0.00275 1.64 AML other m 2021-09-28T21:40:36.07
IV.RESU.HHN. ML:2.6 0.00279 0.58 AML other m 2021-09-28T21:40:37.41
IV.GALF.HHN. ML:2.4 0.0009545 1.52 AML other m 2021-09-28T21:40:39.82
IV.RESU.HHE. ML:2.3 0.00148 1.48 AML other m 2021-09-28T21:40:41.19
IV.GALF.HHE. ML:2.4 0.001145 1.66 AML other m 2021-09-28T21:40:41.98
IV.SCIAR.HHE. ML:2.3 0.0006495 0.46 AML other m 2021-09-28T21:40:42.24
IV.MSFR.HHE. ML:1.8 0.0001875 1.16 AML other m 2021-09-28T21:40:42.13
IV.SCIAR.HNE. ML:2.3 0.000669 0.22 AML other m 2021-09-28T21:40:43.26
IV.SCIAR.HHN. ML:2.4 0.0008395000000000001 1.12 AML other m 2021-09-28T21:40:43.40
IV.SCIAR.HNN. ML:2.4 0.0008280000000000001 1.12 AML other m 2021-09-28T21:40:43.40
IV.MSFR.HHN. ML:1.9 0.0002565 0.54 AML other m 2021-09-28T21:40:44.95
IV.SOLUN.HHE. ML:2.4 0.00047599999999999997 1.24 AML other m 2021-09-28T21:40:49.36
IV.MUCR.HHE. ML:2.2 0.00029949999999999996 0.62 AML other m 2021-09-28T21:40:50.48
IV.ESCV.HHE. ML:2.3 0.0005124999999999999 1.22 AML other m 2021-09-28T21:40:51.04
IV.MUCR.HHN. ML:2.2 0.00030199999999999997 0.36 AML other m 2021-09-28T21:40:51.70
IV.CPTP.HHN. ML:2.3 0.0005915 0.64 AML other m 2021-09-28T21:40:52.16
IV.EPZF.HHN. ML:2.3 0.00041549999999999996 0.38 AML other m 2021-09-28T21:40:52.73
IV.SOLUN.HHN. ML:2.1 0.000247 0.96 AML other m 2021-09-28T21:40:53.37
IV.EPZF.HHE. ML:2.2 0.000381 1.12 AML other m 2021-09-28T21:40:54.88
IV.MPG.HHN. ML:1.8 0.00008740000000000001 0.78 AML other m 2021-09-28T21:40:54.74
IV.CPTP.HHE. ML:2.1 0.00038449999999999997 0.72 AML other m 2021-09-28T21:40:54.36
IV.ESCV.HHN. ML:2.3 0.0005175000000000001 0.82 AML other m 2021-09-28T21:40:54.47
IV.MPG.HHE. ML:1.7 0.0000753 1.32 AML other m 2021-09-28T21:40:55.73
IV.IACL.HHN. ML:2.4 0.000382 0.36 AML other m 2021-09-28T21:40:55.65
IV.EMSG.HHE. ML:2.4 0.00045650000000000004 0.54 AML other m 2021-09-28T21:40:56.37
IV.IVPL.HHE. ML:2.4 0.0002485 0.82 AML other m 2021-09-28T21:40:58.45
IV.EMSG.HHN. ML:2.4 0.000484 0.72 AML other m 2021-09-28T21:40:58.43
IV.ECTS.HHN. ML:2.2 0.0002265 0.34 AML other m 2021-09-28T21:40:58.55
IV.IACL.HHE. ML:2.4 0.0003775 0.48 AML other m 2021-09-28T21:40:59.84
IV.ECTS.HHE. ML:2.1 0.00017449999999999999 0.42 AML other m 2021-09-28T21:41:00.69
IV.IVPL.HHN. ML:2.4 0.0003115 0.8 AML other m 2021-09-28T21:41:02.64
IV.CRJA.HHE. ML:2.3 0.00019600000000000002 0.7 AML other m 2021-09-28T21:41:04.40
IV.EPIT.HHN. ML:2.5 0.00047999999999999996 0.54 AML other m 2021-09-28T21:41:04.68
IV.SCIAC.HHE. ML:1.8 0.00007155 0.36 AML other m 2021-09-28T21:41:06.32
IV.CRJA.HHN. ML:2.4 0.00021250000000000002 0.82 AML other m 2021-09-28T21:41:06.35
IV.MMGO.HHE. ML:1.8 0.000058649999999999996 0.42 AML other m 2021-09-28T21:41:06.47
IV.MPNC.HHE. ML:2.5 0.0002635 0.52 AML other m 2021-09-28T21:41:08.67
IV.MPNC.HHN. ML:2.5 0.000253 1.56 AML other m 2021-09-28T21:41:08.10
IV.MSRU.HHE. ML:2.5 0.00020700000000000002 0.66 AML other m 2021-09-28T21:41:09.33
IV.MMGO.HHN. ML:1.8 0.000051949999999999996 0.42 AML other m 2021-09-28T21:41:10.98
IV.MSRU.HHN. ML:2.4 0.0001635 0.42 AML other m 2021-09-28T21:41:11.91
IV.SELL.HHE. ML:1.7 0.000009945 0.84 AML other m 2021-09-28T21:41:47.04
IV.SELL.HHN. ML:1.7 0.00000795 0.64 AML other m 2021-09-28T21:41:50.94
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