Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 30-07-2021 and time 07:30:04 (Italy) in region 4 km SW Castelbuono (PA)

A magnitude ML 1.9 earthquake occured in region: 4 km SW Castelbuono (PA), on

  • 30-07-2021 05:30:04 (UTC)
  • 30-07-2021 07:30:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9070, 14.0530 at 7 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
Castelbuono PA 5 8943 8943
Isnello PA 6 1589 10532
Gratteri PA 10 963 11495
Collesano PA 10 4054 15549
Geraci Siculo PA 10 1945 17494
Polizzi Generosa PA 11 3407 20901
Petralia Sottana PA 12 2821 23722
San Mauro Castelverde PA 12 1701 25423
Pollina PA 13 2974 28397
Petralia Soprana PA 13 3360 31757
Castellana Sicula PA 14 3411 35168
Scillato PA 14 613 35781
Lascari PA 14 3588 39369
Cefalù PA 15 14393 53762
Caltavuturo PA 17 4017 57779
Blufi PA 17 1029 58808
Campofelice di Roccella PA 18 7537 66345
Gangi PA 18 6811 73156
Bompietro PA 18 1401 74557
Tusa ME 19 2925 77482
Sclafani Bagni PA 20 426 77908

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km N of Caltanissetta (63360 inhabitants)
51 Km E of Bagheria (55387 inhabitants)
65 Km E of Palermo (674435 inhabitants)
78 Km NE of Agrigento (59770 inhabitants)
95 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 1.9 2021-07-30
05:30:04		 37.9067 14.0528 7 2021-12-29
11:12:50		 Bollettino Sismico Italiano INGV 97331541
Reviewed
Rev100 		ML 1.9 2021-07-30
05:30:04		 37.9035 14.0588 7 2021-07-30
05:42:15		 Sala Sismica INGV-Roma 93386351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-30 05:30:04 ± 0.1
Latitude 37.9067 ± 0.0063
Longitude 14.0528 ± 0.0091
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97331541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 866
Semi-minor axis of confidence ellipse (meter) 628
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
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) 0.77432
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 93386351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-30 05:42:15

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 97331541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-08 01:35:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIZZ.HHZ. 2021-07-30T05:31:02.65 3.0 undecidable manual Sn -1.34 0
IV.MUCR.HHZ. 2021-07-30T05:30:28.10 0.6 undecidable manual S 78 73.371 50 0.24 42
IV.IACL.HHZ. 2021-07-30T05:30:28.23 0.6 undecidable manual S 21 74.2701 50 0.12 43
IV.MCPD.HHZ. 2021-07-30T05:30:25.51 0.6 undecidable manual S 68 63.7917 50 0.2 44
IV.GALF.HHZ. 2021-07-30T05:30:22.33 0.6 undecidable manual S 116 50.0166 50 0.71 39
IV.IFIL.HHZ. 2021-07-30T05:30:20.11 0.3 undecidable manual P 32 85.9473 50 0.03 65
IV.IACL.HHZ. 2021-07-30T05:30:18.49 0.3 undecidable manual P 21 74.2701 50 0.21 64
IV.MUCR.HHZ. 2021-07-30T05:30:17.59 0.3 undecidable manual P 78 73.371 50 -0.54 59
IV.ALJA.HHZ. 2021-07-30T05:30:16.20 1.0 undecidable manual S 236 31.5462 102 0.17 23
IV.MCPD.HHZ. 2021-07-30T05:30:15.77 0.6 undecidable manual P 68 63.7917 50 -0.89 35
IV.GALF.HHZ. 2021-07-30T05:30:15.06 0.3 undecidable manual P 116 50.0166 50 0.53 62
IV.SOLUN.HHE. 2021-07-30T05:30:14.46 0.6 undecidable manual P 294 49.9167 50 -0.06 46
IV.MSFR.HHZ. 2021-07-30T05:30:13.76 0.3 undecidable manual P 73 49.2174 50 -0.64 60
IV.ALJA.HHZ. 2021-07-30T05:30:11.07 0.3 undecidable manual P 236 31.5462 102 -0.23 69
IV.RESU.HHZ. 2021-07-30T05:30:10.81 0.3 undecidable manual P 179 28.8489 103 0.04 72
IV.PLLN.EHZ. 2021-07-30T05:30:09.62 0.6 undecidable manual S 40 12.3765 118 -0.11 49
IV.GIB.HHZ. 2021-07-30T05:30:09.33 0.6 undecidable manual S 346 9.5793 125 0.44 46
IV.GIB.HHZ. 2021-07-30T05:30:07.27 0.1 negative manual P 346 9.5793 125 0.09 98
IV.PLLN.EHZ. 2021-07-30T05:30:07.50 0.1 undecidable manual P 40 12.3765 118 -0.16 96
IV.CSLB.HHZ. 2021-07-30T05:30:07.59 0.3 undecidable manual S 7 3.4965 153 0.13 74
IV.CSLB.HHZ. 2021-07-30T05:30:06.30 0.1 negative manual P 7 3.4965 153 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIB.HHN. ML:2.3 0.003085 0.34 AML other m 2021-07-30T05:30:09.74
IV.GIB.HHE. ML:2.0 0.001585 0.28 AML other m 2021-07-30T05:30:11.33
IV.PLLN.EHE. ML:1.9 0.0009670000000000001 0.68 AML other m 2021-07-30T05:30:11.75
IV.PLLN.EHN. ML:1.8 0.000897 1.44 AML other m 2021-07-30T05:30:13.83
IV.RESU.HHE. ML:1.8 0.00034399999999999996 0.54 AML other m 2021-07-30T05:30:19.00
IV.ALJA.HHN. ML:1.5 0.00015799999999999996 1.36 AML other m 2021-07-30T05:30:19.96
IV.ALJA.HHE. ML:1.8 0.000289 0.34 AML other m 2021-07-30T05:30:20.59
IV.RESU.HHN. ML:2.0 0.000477 0.34 AML other m 2021-07-30T05:30:22.43
IV.GALF.HHE. ML:2.0 0.0002415 1 AML other m 2021-07-30T05:30:32.23
IV.IACL.HHN. ML:2.0 0.000167 1.56 AML other m 2021-07-30T05:30:32.95
IV.IACL.HHE. ML:1.9 0.000129 1.62 AML other m 2021-07-30T05:30:33.00
IV.MSFR.HHE. ML:1.3 0.0000493 0.64 AML other m 2021-07-30T05:30:34.72
IV.MSFR.HHN. ML:1.4 0.00007185 0.86 AML other m 2021-07-30T05:30:35.95
IV.MCPD.HHN. ML:1.5 0.00005355 0.28 AML other m 2021-07-30T05:30:36.88
IV.GALF.HHN. ML:2.1 0.00035549999999999997 0.58 AML other m 2021-07-30T05:30:37.30
IV.IFIL.HHN. ML:2.1 0.0001535 1.32 AML other m 2021-07-30T05:30:39.01
IV.MCPD.HHE. ML:1.4 0.000049000000000000005 1.36 AML other m 2021-07-30T05:30:39.03
IV.MUCR.HHN. ML:1.8 0.00010190000000000001 1 AML other m 2021-07-30T05:30:40.40
IV.IFIL.HHE. ML:2.5 0.00035950000000000006 1.42 AML other m 2021-07-30T05:30:42.18
IV.MUCR.HHE. ML:1.8 0.00009190000000000001 0.3 AML other m 2021-07-30T05:30:42.04
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