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) 37.92, 14.041 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.

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
Pollina PA 13 2974 23875
Lascari PA 13 3588 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
Blufi PA 19 1029 66345
Tusa ME 19 2925 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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire *

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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
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
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:2.4

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

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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance 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 1.2869 50 0.31 72
IV.SSY.HHZ. 2021-07-30T05:33:42.14 0.3 undecidable manual P 133 1.1179 50 0.63 52
IV.MCPD.HHZ. 2021-07-30T05:33:41.00 1.0 undecidable manual S 70 0.5783 50 0.11 22
IV.MPNC.HHZ. 2021-07-30T05:33:40.39 0.1 negative manual P 77 1.0567 50 -0.07 80
IV.HCRL.HHZ. 2021-07-30T05:33:40.20 1.0 undecidable manual P 129 1.0108 50 0.53 18
IV.HVZN.HHZ. 2021-07-30T05:33:38.62 0.3 undecidable manual P 144 0.9137 50 0.61 55
IV.GALF.HHZ. 2021-07-30T05:33:38.06 0.6 undecidable manual S 117 0.4649 50 0.55 41
IV.IVPL.HHZ. 2021-07-30T05:33:37.52 0.1 negative manual P 58 0.8669 50 0.3 80
IV.ILOS.HHZ. 2021-07-30T05:33:37.24 0.3 undecidable manual P 53 0.8849 50 -0.28 60
IV.SOLUN.HHZ. 2021-07-30T05:33:36.72 0.3 undecidable manual S 293 0.4353 50 0.07 69
IV.MSFR.HHZ. 2021-07-30T05:33:36.91 0.6 undecidable manual S 75 0.4479 50 -0.11 45
IV.RAFF.HHZ. 2021-07-30T05:33:35.69 0.6 undecidable manual P 160 0.7419 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 0.768 50 -0.03 65
IV.IACL.HHZ. 2021-07-30T05:33:34.06 0.1 positive manual P 22 0.6601 50 0.39 82
IV.MUCR.HHZ. 2021-07-30T05:33:33.22 0.1 positive manual P 79 0.6673 50 -0.57 78
IV.ALJA.HHZ. 2021-07-30T05:33:32.21 0.6 undecidable manual S 233 0.2842 104 0.43 44
IV.RESU.HHZ. 2021-07-30T05:33:31.01 0.6 undecidable manual S 177 0.2734 104 -0.37 45
IV.MCPD.HHZ. 2021-07-30T05:33:31.92 0.3 undecidable manual P 70 0.5783 50 -0.36 63
IV.GALF.HHZ. 2021-07-30T05:33:30.52 0.3 undecidable manual P 117 0.4649 50 0.19 67
IV.MSFR.HHZ. 2021-07-30T05:33:29.29 0.1 positive manual P 75 0.4479 50 -0.76 76
IV.SOLUN.HHZ. 2021-07-30T05:33:29.42 0.1 positive manual P 293 0.4353 50 -0.41 86
IV.SCIAR.HHE. 2021-07-30T05:33:29.92 0.6 undecidable manual S 275 0.2311 107 0.12 47
IV.ALJA.HHZ. 2021-07-30T05:33:26.62 0.1 positive manual P 233 0.2842 104 -0.4 88
IV.RESU.HHZ. 2021-07-30T05:33:26.54 0.1 positive manual P 177 0.2734 104 -0.25 92
IV.SCIAR.HHE. 2021-07-30T05:33:25.64 0.1 negative manual P 275 0.2311 107 -0.23 93
IV.PLLN.EHE. 2021-07-30T05:33:25.11 0.6 undecidable manual S 48 0.1079 122 -0.33 46
IV.GIB.HHZ. 2021-07-30T05:33:24.94 0.3 undecidable manual S 350 0.071 134 0.63 64
IV.GIB.HHZ. 2021-07-30T05:33:23.04 0.1 negative manual P 350 0.071 134 0.33 93
IV.CSLB.HHE. 2021-07-30T05:33:23.30 0.6 undecidable manual S 37 0.0216 162 0.02 50
IV.PLLN.EHE. 2021-07-30T05:33:23.26 0.1 positive manual P 48 0.1079 122 -0.1 97
IV.CSLB.HHE. 2021-07-30T05:33:22.06 0.1 negative manual P 37 0.0216 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 0.01297539 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:0 0.0008218117 0.3392 AML other m 2021-07-30T05:33:42.24
IV.GALF.HHN. ML:0 0.00092643795 0.5792 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 0.000138 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 0.00012874852 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 0.00016078 0.6208 AML other m 2021-07-30T05:34:00.35
IV.ILOS.HNE. ML:2.8 0.00061820105 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 0.000894 0.42 AML other m 2021-07-30T05:34:03.00
IV.ILOS.HHN. ML:3 0.000933 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 0.00132 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 0.0001405 1.54 AML other m 2021-07-30T05:34:09.91
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
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