Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 30-07-2021 and time 07:33:20 (Italy) in region 4 km SE Isnello (PA)

A magnitude ML 2.5 earthquake occured in region: 4 km SE Isnello (PA), on

  • 30-07-2021 05:33:20 (UTC)
  • 30-07-2021 07:33:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9200, 14.0410 at 8 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
Isnello PA 4 1589 1589
Castelbuono PA 5 8943 10532
Gratteri PA 8 963 11495
Collesano PA 9 4054 15549
Geraci Siculo PA 12 1945 17494
Polizzi Generosa PA 12 3407 20901
Lascari PA 13 3588 24489
Pollina PA 13 2974 27463
San Mauro Castelverde PA 13 1701 29164
Petralia Sottana PA 13 2821 31985
Cefalù PA 14 14393 46378
Scillato PA 14 613 46991
Petralia Soprana PA 15 3360 50351
Castellana Sicula PA 15 3411 53762
Campofelice di Roccella PA 16 7537 61299
Caltavuturo PA 17 4017 65316
Tusa ME 19 2925 68241
Blufi PA 19 1029 69270
Sclafani Bagni PA 20 426 69696
Gangi PA 20 6811 76507
Bompietro PA 20 1401 77908
Cerda PA 20 5330 83238

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km N of Caltanissetta (63360 inhabitants)
50 Km E of Bagheria (55387 inhabitants)
63 Km E of Palermo (674435 inhabitants)
79 Km NE of Agrigento (59770 inhabitants)
97 Km N of Gela (75827 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 2.5 2021-07-30
05:33:20		 37.9202 14.0412 8 2021-12-29
11:12:51		 Bollettino Sismico Italiano INGV 97331691
Reviewed
Rev100 		ML 2.4 2021-07-30
05:33:20		 37.9128 14.0462 8 2021-07-30
05:39:42		 Sala Sismica INGV-Roma 93386251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-30 05:33:20 ± 0.08
Latitude 37.9202 ± 0.0054
Longitude 14.0412 ± 0.0057
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97331691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 566
Semi-minor axis of confidence ellipse (meter) 481
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.28693
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 97331691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-08 01:51:32

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 93386251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-30 05:39:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SOI.EHZ. 2021-07-30T05:33:51.15 3.0 undecidable manual Pg 2.87 0
IV.HAVL.HHZ. 2021-07-30T05:33:44.71 0.1 positive manual P 138 142.8459 50 0.31 72
IV.SSY.HHZ. 2021-07-30T05:33:42.14 0.3 undecidable manual P 133 124.0869 50 0.63 52
IV.MCPD.HHZ. 2021-07-30T05:33:41.00 1.0 undecidable manual S 70 64.1913 50 0.11 22
IV.MPNC.HHZ. 2021-07-30T05:33:40.39 0.1 negative manual P 77 117.2937 50 -0.07 80
IV.HCRL.HHZ. 2021-07-30T05:33:40.20 1.0 undecidable manual P 129 112.1988 50 0.53 18
IV.HVZN.HHZ. 2021-07-30T05:33:38.62 0.3 undecidable manual P 144 101.4207 50 0.61 55
IV.GALF.HHZ. 2021-07-30T05:33:38.06 0.6 undecidable manual S 117 51.6039 50 0.55 41
IV.IVPL.HHZ. 2021-07-30T05:33:37.52 0.1 negative manual P 58 96.2259 50 0.3 80
IV.ILOS.HHZ. 2021-07-30T05:33:37.24 0.3 undecidable manual P 53 98.2239 50 -0.28 60
IV.SOLUN.HHZ. 2021-07-30T05:33:36.72 0.3 undecidable manual S 293 48.3183 50 0.07 69
IV.MSFR.HHZ. 2021-07-30T05:33:36.91 0.6 undecidable manual S 75 49.7169 50 -0.11 45
IV.RAFF.HHZ. 2021-07-30T05:33:35.69 0.6 undecidable manual P 160 82.3509 50 0.61 38
IV.MTGR.HHZ. 2021-07-30T05:33:35.51 3.0 undecidable manual P -4.86 0
IV.IFIL.HHZ. 2021-07-30T05:33:35.49 0.3 undecidable manual P 33 85.248 50 -0.03 65
IV.IACL.HHZ. 2021-07-30T05:33:34.06 0.1 positive manual P 22 73.2711 50 0.39 82
IV.MUCR.HHZ. 2021-07-30T05:33:33.22 0.1 positive manual P 79 74.0703 50 -0.57 78
IV.ALJA.HHZ. 2021-07-30T05:33:32.21 0.6 undecidable manual S 233 31.5462 104 0.43 44
IV.RESU.HHZ. 2021-07-30T05:33:31.01 0.6 undecidable manual S 177 30.3474 104 -0.37 45
IV.MCPD.HHZ. 2021-07-30T05:33:31.92 0.3 undecidable manual P 70 64.1913 50 -0.36 63
IV.GALF.HHZ. 2021-07-30T05:33:30.52 0.3 undecidable manual P 117 51.6039 50 0.19 67
IV.MSFR.HHZ. 2021-07-30T05:33:29.29 0.1 positive manual P 75 49.7169 50 -0.76 76
IV.SOLUN.HHZ. 2021-07-30T05:33:29.42 0.1 positive manual P 293 48.3183 50 -0.41 86
IV.SCIAR.HHE. 2021-07-30T05:33:29.92 0.6 undecidable manual S 275 25.6521 107 0.12 47
IV.ALJA.HHZ. 2021-07-30T05:33:26.62 0.1 positive manual P 233 31.5462 104 -0.4 88
IV.RESU.HHZ. 2021-07-30T05:33:26.54 0.1 positive manual P 177 30.3474 104 -0.25 92
IV.SCIAR.HHE. 2021-07-30T05:33:25.64 0.1 negative manual P 275 25.6521 107 -0.23 93
IV.PLLN.EHE. 2021-07-30T05:33:25.11 0.6 undecidable manual S 48 11.9769 122 -0.33 46
IV.GIB.HHZ. 2021-07-30T05:33:24.94 0.3 undecidable manual S 350 7.881 134 0.63 64
IV.GIB.HHZ. 2021-07-30T05:33:23.04 0.1 negative manual P 350 7.881 134 0.33 93
IV.CSLB.HHE. 2021-07-30T05:33:23.30 0.6 undecidable manual S 37 2.3976 162 0.02 50
IV.PLLN.EHE. 2021-07-30T05:33:23.26 0.1 positive manual P 48 11.9769 122 -0.1 97
IV.CSLB.HHE. 2021-07-30T05:33:22.06 0.1 negative manual P 37 2.3976 162 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIB.HHN. ML:2.9 0.012975390000000002 0.3616 AML other m 2021-07-30T05:33:25.68
IV.GIB.HHE. ML:2.6 0.007195 1.72 AML other m 2021-07-30T05:33:27.10
IV.RESU.HHE. ML:2.5 0.0015405575 1.4624 AML other m 2021-07-30T05:33:34.76
IV.ALJA.HHE. ML:2.4 0.001245 1.42 AML other m 2021-07-30T05:33:35.73
IV.ALJA.HHN. ML:2.1 0.00065180845 0.2208 AML other m 2021-07-30T05:33:35.70
IV.RESU.HHN. ML:2.5 0.00174 0.38 AML other m 2021-07-30T05:33:38.21
IV.MSFR.HHE. ML:1.8 0.00016122875 1.4208 AML other m 2021-07-30T05:33:39.91
IV.SOLUN.HHE. ML:2.3 0.0005448502 1.5808 AML other m 2021-07-30T05:33:40.81
IV.SOLUN.HHN. ML:2.1 0.0003435 0.36 AML other m 2021-07-30T05:33:41.51
IV.MSFR.HHN. ML:1.8 0.00017131035 0.6592 AML other m 2021-07-30T05:33:42.02
IV.GALF.HHE. ML:2.5 0.000822 0.34 AML other m 2021-07-30T05:33:42.23
IV.GALF.HHN. ML:2.6 0.0009274999999999999 0.58 AML other m 2021-07-30T05:33:42.78
IV.GALF.HNN. ML:1.8 0.00017228455 0.4192 AML other m 2021-07-30T05:33:42.74
IV.MCPD.HHE. ML:1.8 0.0001277472 1.5808 AML other m 2021-07-30T05:33:46.96
IV.MCPD.HHN. ML:1.9 0.00013800000000000002 0.58 AML other m 2021-07-30T05:33:47.70
IV.MUCR.HHE. ML:2.3 0.0003105 0.26 AML other m 2021-07-30T05:33:47.55
IV.GALF.HNE. ML:1.7 0.00012874852000000002 0.4416 AML other m 2021-07-30T05:33:47.53
IV.IACL.HHN. ML:2.5 0.0005002348 0.2208 AML other m 2021-07-30T05:33:48.71
IV.MUCR.HHN. ML:2.3 0.0003049768 0.3776 AML other m 2021-07-30T05:33:49.44
IV.IACL.HHE. ML:2.4 0.000377347 0.2208 AML other m 2021-07-30T05:33:50.05
IV.IFIL.HHE. ML:2.9 0.0009938921 0.3616 AML other m 2021-07-30T05:33:51.97
IV.IFIL.HHN. ML:2.6 0.00049755255 0.4832 AML other m 2021-07-30T05:33:54.73
IV.IVPL.HHE. ML:2.4 0.0002615 1.66 AML other m 2021-07-30T05:33:55.88
IV.ILOS.HHE. ML:2.8 0.00067202435 0.3616 AML other m 2021-07-30T05:33:56.41
IV.IVPL.HHN. ML:2.3 0.000217 0.28 AML other m 2021-07-30T05:33:57.79
IV.HCRL.HHN. ML:2.3 0.00016078000000000002 0.6208 AML other m 2021-07-30T05:34:00.35
IV.ILOS.HNE. ML:2.8 0.0006182010499999999 0.6496 AML other m 2021-07-30T05:34:00.20
IV.HCRL.HHE. ML:2.3 0.00015339605 0.2624 AML other m 2021-07-30T05:34:00.85
IV.MPNC.HHE. ML:2.6 0.000275 0.52 AML other m 2021-07-30T05:34:02.12
IV.ILOS.HNN. ML:2.9 0.0008939999999999999 0.42 AML other m 2021-07-30T05:34:03.00
IV.ILOS.HHN. ML:3.0 0.0009329999999999999 0.42 AML other m 2021-07-30T05:34:03.01
IV.MPNC.HHN. ML:2.6 0.0003085 0.46 AML other m 2021-07-30T05:34:03.74
IV.HVZN.HHN. ML:2.5 0.00033 0.58 AML other m 2021-07-30T05:34:04.40
IV.HVZN.HNN. ML:2.5 0.000312 0.6 AML other m 2021-07-30T05:34:04.70
IV.HAVL.HHN. ML:2.5 0.000174 0.32 AML other m 2021-07-30T05:34:05.74
IV.HVZN.HHE. ML:2.7 0.0004465 1.42 AML other m 2021-07-30T05:34:06.02
IV.HVZN.HNE. ML:2.6 0.000422 1.42 AML other m 2021-07-30T05:34:06.02
IV.SSY.HHN. ML:3.3 0.0013199999999999998 0.5 AML other m 2021-07-30T05:34:06.90
IV.SSY.HHE. ML:2.8 0.00049055625 0.48 AML other m 2021-07-30T05:34:06.76
IV.HAVL.HHE. ML:2.4 0.00014050000000000003 1.54 AML other m 2021-07-30T05:34:09.91
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