Earthquake with magnitude of ML 1.0 on date 01-08-2021 and time 07:47:38 (Italy) in region 4 km S Contessa Entellina (PA)

A magnitude ML 1.0 earthquake occured in region: 4 km S Contessa Entellina (PA), on

  • 01-08-2021 05:47:38 (UTC)
  • 01-08-2021 07:47:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.691, 13.186 at 14 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Contessa Entellina PA 4 1766 1766
Giuliana PA 5 1952 3718
Bisacquino PA 7 4599 8317
Chiusa Sclafani PA 8 2838 11155
Sambuca di Sicilia AG 8 5877 17032
Campofiorito PA 10 1302 18334
Caltabellotta AG 13 3681 22015
Burgio AG 14 2672 24687
Santa Margherita di Belice AG 14 6363 31050
Villafranca Sicula AG 15 1410 32460
Poggioreale TP 16 1494 33954
Lucca Sicula AG 16 1805 35759
Roccamena PA 17 1505 37264
Corleone PA 17 11234 48498
Montevago AG 17 3006 51504
Palazzo Adriano PA 17 2135 53639
Salaparuta TP 17 1696 55335

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km SW of Palermo (674435 inhabitants)
52 Km SW of Bagheria (55387 inhabitants)
53 Km E of Mazara del Vallo (51718 inhabitants)
55 Km NW of Agrigento (59770 inhabitants)
67 Km E of Marsala (83194 inhabitants)
69 Km SE of Trapani (68759 inhabitants)
80 Km W of Caltanissetta (63360 inhabitants)
Recent and historical seismicity
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
Reviewed
Rev100
ML 1.0 2021-08-01
05:47:38
37.6913 13.1857 15 2021-08-01
05:53:00
Sala Sismica INGV-Roma 93478241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-01 05:47:38 ± 0.19
Latitude 37.6913 ± 0.0063
Longitude 13.1857 ± 0.0091
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93478241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 802
Semi-minor axis of confidence ellipse (meter) 412
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 204
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 93478241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-01 05:53:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ACATE.EHZ. 2021-08-01T05:47:55.22 3.0 undecidable manual P -0.02 0
IV.SCIAC.HHZ. 2021-08-01T05:47:46.89 0.3 undecidable manual S 201 0.1871 110 -0.11 97
IV.MMGO.HHZ. 2021-08-01T05:47:46.48 0.3 undecidable manual S 260 0.1682 114 0 100
MN.CLTB.HHZ. 2021-08-01T05:47:45.24 0.3 undecidable manual S 168 0.116 128 0.09 100
IV.MBFT.HHE. 2021-08-01T05:47:45.51 0.3 undecidable manual P 324 0.3139 99 -0.14 95
IV.SCIAC.HHZ. 2021-08-01T05:47:43.70 0.3 positive manual P 201 0.1871 110 0.16 97
IV.MMGO.HHZ. 2021-08-01T05:47:43.30 1.0 positive manual P 260 0.1682 114 0.06 33
IV.CRJA.HHZ. 2021-08-01T05:47:43.67 0.6 negative manual P 308 0.1808 111 0.23 64
MN.CLTB.HHZ. 2021-08-01T05:47:42.19 0.6 positive manual P 168 0.116 128 -0.28 63
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMGO.HHN. ML:0.8 3.9199195E-5 0.2784 AML other m 2021-08-01T05:47:47.96
IV.MMGO.HHE. ML:0.7 3.705E-5 0.42 AML other m 2021-08-01T05:47:48.28
MN.CLTB.HHE. ML:2 0.0008155 0.36 AML other m 2021-08-01T05:47:48.43
MN.CLTB.HHN. ML:2.2 0.0014289155 0.4 AML other m 2021-08-01T05:47:49.23
IV.MMGO.HNE. ML:0.7 3.45946565E-5 0.688 AML other m 2021-08-01T05:47:57.99
IV.MMGO.HNN. ML:0.9 4.970432E-5 0.2912 AML other m 2021-08-01T05:47:47.97
IV.CRJA.HHE. ML:1.1 7.9898675E-5 0.48 AML other m 2021-08-01T05:47:52.54
IV.CRJA.HHN. ML:1 6.219627E-5 0.48 AML other m 2021-08-01T05:47:59.43
IV.SCIAC.HHE. ML:1 6.682339E-5 0.32 AML other m 2021-08-01T05:47:49.57
IV.SCIAC.HHN. ML:1.1 7.741256E-5 0.72 AML other m 2021-08-01T05:47:54.96
IV.ACATE.HNE. ML:2.4 0.0001644321 0.8 AML other m 2021-08-01T05:48:02.68
IV.ACATE.HNN. ML:2.4 0.00015507185 1.4304 AML other m 2021-08-01T05:48:02.66
IV.ACATE.EHE. ML:2 5.355772E-5 0.6208 AML other m 2021-08-01T05:48:22.10
IV.ACATE.EHN. ML:1.9 4.396921E-5 0.3616 AML other m 2021-08-01T05:48:01.32
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