Earthquake with magnitude of Md 1.2 on date 06-05-2021 and time 15:13:04 (Italy) in region 6 km NW Menfi (AG)

A magnitude Md 1.2 earthquake occured in region: 6 km NW Menfi (AG), on

  • 06-05-2021 13:13:04 (UTC)
  • 06-05-2021 15:13:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.642, 12.926 at 5 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
Montevago AG 9 3006 15598
Partanna TP 10 10607 26205
Santa Margherita di Belice AG 10 6363 32568
Castelvetrano TP 13 31806 64374
Salaparuta TP 15 1696 66070
Santa Ninfa TP 15 5043 71113
Campobello di Mazara TP 16 11956 83069
Sambuca di Sicilia AG 16 5877 88946
Poggioreale TP 17 1494 90440
Gibellina TP 19 4115 94555

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Mazara del Vallo (51718 inhabitants)
47 Km E of Marsala (83194 inhabitants)
55 Km SE of Trapani (68759 inhabitants)
65 Km SW of Palermo (674435 inhabitants)
69 Km NW of Agrigento (59770 inhabitants)
71 Km SW of Bagheria (55387 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
Md 1.2 2021-05-06
13:13:04
37.6423 12.9262 5 2021-05-06
13:35:11
Sala Sismica INGV-Roma 89836591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-06 13:13:04 ± 0.17
Latitude 37.6423 ± 0.0054
Longitude 12.9262 ± 0.0159
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89836591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1383
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 227
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 7
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) 0.18796
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 4
Magnitude information

Md:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 4
Type of magnitude Md
Reference to an origin 89836591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-06 13:35:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PLLN.EHZ. 2021-05-06T13:13:28.76 3.0 undecidable manual S -0.04 0
IV.SCIAC.HHE. 2021-05-06T13:13:12.17 0.1 undecidable manual S 132 0.188 104 0.04 98
IV.CRJA.HHZ. 2021-05-06T13:13:11.59 0.1 undecidable manual S 21 0.1709 106 0.09 97
IV.SCIAC.HHE. 2021-05-06T13:13:08.95 0.1 undecidable manual P 132 0.188 104 -0.03 98
IV.CRJA.HHZ. 2021-05-06T13:13:08.34 0.3 positive manual P 21 0.1709 106 -0.27 70
IV.MFNL.HHZ. 2021-05-06T13:13:08.21 0.1 undecidable manual P 359 0.1484 108 0.08 98
IV.MMGO.HHZ. 2021-05-06T13:13:07.14 0.1 undecidable manual S 64 0.0441 137 -0.06 100
IV.MMGO.HHZ. 2021-05-06T13:13:06.19 0.1 negative manual P 64 0.0441 137 0.06 100
MN.CLTB.HHZ. 2021-05-06T13:13:02.24 3.0 negative manual P -0.1 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMGO.HHZ. Md:0.9 7 END duration s
IV.MFNL.HHZ. Md:1.5 14 END duration s
IV.CRJA.HHZ. Md:1.3 10 END duration s
IV.SCIAC.HHE. Md:1.3 10 END duration s
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