Earthquake with magnitude of ML 1.7 on date 21-07-2019 and time 22:28:55 (UTC) in region 6 km E Menfi (AG)

A magnitude ML 1.7 earthquake occured in region: 6 km E Menfi (AG), on

  • 21-07-2019 22:28:55 (UTC)
  • 22-07-2019 00:28:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6, 13.03 at 8 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

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Mazara del Vallo (51718 inhabitants)
57 Km E of Marsala (83194 inhabitants)
58 Km NW of Agrigento (59770 inhabitants)
65 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Rev 100 ML 1.7 2019-07-21
22:28:55
37.6 13.03 8 2019-07-21
22:40:10
Sala Sismica INGV-Roma 70780941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-21 22:28:55 ± 0.33
Latitude 37.60 ± 0.02
Longitude 13.03 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70780941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1701
Semi-minor axis of confidence ellipse (meter) 1149
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 337
Circular confidence region, given by single value of horizontal uncertainty (meter) 1700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.85705
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 70780941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-21 22:40:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CLTA.HHE. 2019-07-21T22:29:12.37 1.0 undecidable manual P 120 0.8571 50 0.69 18
IV.MARS.EHZ. 2019-07-21T22:29:11.20 0.3 undecidable manual S 293 0.4029 50 0.93 54
IV.FAVR.HHE. 2019-07-21T22:29:11.92 3.0 undecidable manual P 0.6007 4.64 0
IV.CORL.HHZ. 2019-07-21T22:29:09.39 0.3 undecidable manual S 36 0.366 50 0.2 69
IV.MBFT.HHZ. 2019-07-21T22:29:08.10 0.3 undecidable manual S 350 0.3552 50 -0.76 59
IV.ALJA.HHE. 2019-07-21T22:29:06.80 0.6 undecidable manual P 75 0.5891 50 -0.3 43
IV.CRJA.HHZ. 2019-07-21T22:29:04.53 0.3 undecidable manual S 353 0.2068 109 0.9 57
IV.CAVT.HHZ. 2019-07-21T22:29:04.72 0.3 undecidable manual S 291 0.2356 107 0.04 73
IV.MARS.EHZ. 2019-07-21T22:29:03.69 0.1 undecidable manual P 293 0.4029 50 -0.22 91
IV.MFNL.HHZ. 2019-07-21T22:29:03.65 0.3 undecidable manual S 336 0.2131 109 -0.24 71
IV.CORL.HHZ. 2019-07-21T22:29:03.16 0.6 undecidable manual P 36 0.366 50 -0.12 47
IV.MBFT.HHZ. 2019-07-21T22:29:02.45 0.3 undecidable manual P 350 0.3552 50 -0.64 62
IV.CRJA.HHZ. 2019-07-21T22:29:00.52 0.1 positive manual P 353 0.2068 109 0.45 90
IV.CAVT.HHZ. 2019-07-21T22:29:00.65 0.1 negative manual P 291 0.2356 107 -0.03 98
IV.MFNL.HHZ. 2019-07-21T22:29:00.58 0.3 undecidable manual P 336 0.2131 109 0.36 69
IV.MMGO.HHZ. 2019-07-21T22:28:58.55 0.3 undecidable manual S 325 0.08 132 -0.8 61
IV.MMGO.HHZ. 2019-07-21T22:28:57.52 0.1 negative manual P 325 0.08 132 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRJA.HHE. ML:2.1 0.0008447459 0.1408 AML other m 2019-07-21T22:29:05.70
IV.CRJA.HHN. ML:1.9 0.0005306851 0.1152 AML other m 2019-07-21T22:29:04.90
IV.MFNL.HHE. ML:1.7 0.0003501428 0.1152 AML other m 2019-07-21T22:29:05.61
IV.MFNL.HHN. ML:1.8 0.000373988 0.1024 AML other m 2019-07-21T22:29:06.97
IV.CAVT.HHE. ML:1.8 0.00037240375 0.1408 AML other m 2019-07-21T22:29:04.95
IV.CAVT.HHN. ML:1.9 0.0005412922 0.0896 AML other m 2019-07-21T22:29:05.09
IV.MBFT.HHE. ML:1.6 0.00014024439 0.2176 AML other m 2019-07-21T22:29:09.36
IV.MBFT.HHN. ML:1.8 0.00021677295 0.3712 AML other m 2019-07-21T22:29:09.20
IV.CORL.HHE. ML:1.4 8.90623E-5 0.32 AML other m 2019-07-21T22:29:16.49
IV.CORL.HHN. ML:1.4 8.8804235E-5 0.3584 AML other m 2019-07-21T22:29:13.54
IV.MARS.EHE. ML:1.3 6.073826E-5 0.2176 AML other m 2019-07-21T22:29:12.33
IV.MARS.EHN. ML:1.1 3.74332175E-5 0.2432 AML other m 2019-07-21T22:29:13.73
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download