Earthquake with magnitude of ML 1.1 on date 08-07-2021 and time 10:11:55 (Italy) in region 6 km E Menfi (AG)

A magnitude ML 1.1 earthquake occured in region: 6 km E Menfi (AG), on

  • 08-07-2021 08:11:55 (UTC)
  • 08-07-2021 10:11:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.597, 13.04 at 7 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
Menfi AG 6 12592 12592
Sambuca di Sicilia AG 9 5877 18469
Sciacca AG 11 40928 59397
Santa Margherita di Belice AG 11 6363 65760
Montevago AG 13 3006 68766
Caltabellotta AG 16 3681 72447
Salaparuta TP 18 1696 74143
Poggioreale TP 19 1494 75637
Partanna TP 19 10607 86244
Contessa Entellina PA 20 1766 88010
Giuliana PA 20 1952 89962

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Mazara del Vallo (51718 inhabitants)
58 Km NW of Agrigento (59770 inhabitants)
58 Km E of Marsala (83194 inhabitants)
64 Km SW of Palermo (674435 inhabitants)
66 Km SE of Trapani (68759 inhabitants)
68 Km SW of Bagheria (55387 inhabitants)
91 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-07-08
08:11:55
37.5967 13.0397 7 2021-07-08
08:19:50
Sala Sismica INGV-Roma 92405381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-08 08:11:55 ± 0.33
Latitude 37.5967 ± 0.0099
Longitude 13.0397 ± 0.0227
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92405381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1993
Semi-minor axis of confidence ellipse (meter) 990
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 1990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.21494
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 92405381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-08 08:19:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CPTP.HHZ. 2021-07-08T08:12:25.92 3.0 undecidable manual S -3.77 0
IV.CRJA.HHZ. 2021-07-08T08:12:03.99 0.3 undecidable manual S 352 0.2068 107 -0.1 75
IV.MFNL.HHZ. 2021-07-08T08:12:01.22 1.0 undecidable manual P 334 0.2149 106 0.46 23
IV.CRJA.HHZ. 2021-07-08T08:12:00.67 0.1 negative manual P 352 0.2068 107 0.09 100
IV.SCIAC.HHZ. 2021-07-08T08:12:00.26 0.3 undecidable manual S 148 0.0944 123 0.14 76
IV.MMGO.HHZ. 2021-07-08T08:11:59.76 0.3 undecidable manual S 323 0.0818 127 0.03 78
IV.SCIAC.HHZ. 2021-07-08T08:11:58.07 0.3 negative manual P 148 0.0944 123 -0.22 75
IV.MMGO.HHZ. 2021-07-08T08:11:57.95 0.3 negative manual P 323 0.0818 127 -0.12 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SCIAC.HHN. ML:1.1 0.0001985 0.54 AML other m 2021-07-08T08:12:01.61
IV.SCIAC.HHE. ML:1 0.00015 0.5 AML other m 2021-07-08T08:12:01.54
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