Earthquake with magnitude of ML 1.6 on date 12-10-2021 and time 23:00:34 (Italy) in region 4 km E Partanna (TP)

A magnitude ML 1.6 earthquake occured in region: 4 km E Partanna (TP), on

  • 12-10-2021 21:00:34 (UTC)
  • 12-10-2021 23:00:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.731, 12.931 at 11 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
Partanna TP 4 10607 10607
Montevago AG 6 3006 13613
Santa Ninfa TP 7 5043 18656
Salaparuta TP 7 1696 20352
Santa Margherita di Belice AG 9 6363 26715
Poggioreale TP 10 1494 28209
Gibellina TP 10 4115 32324
Castelvetrano TP 13 31806 64130
Salemi TP 15 10794 74924
Menfi AG 15 12592 87516
Sambuca di Sicilia AG 18 5877 93393
Vita TP 19 2056 95449
Campobello di Mazara TP 20 11956 107405

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Mazara del Vallo (51718 inhabitants)
44 Km E of Marsala (83194 inhabitants)
49 Km SE of Trapani (68759 inhabitants)
57 Km SW of Palermo (674435 inhabitants)
64 Km SW of Bagheria (55387 inhabitants)
74 Km NW of Agrigento (59770 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 1.6 2021-10-12
21:00:34
37.7307 12.9313 11 2021-10-12
21:04:49
Sala Sismica INGV-Roma 96481801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 21:00:34 ± 0.18
Latitude 37.7307 ± 0.0090
Longitude 12.9313 ± 0.0273
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96481801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2492
Semi-minor axis of confidence ellipse (meter) 444
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 2490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 213
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.2716
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 96481801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 21:04:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SCIAC.HHZ. 2021-10-12T21:00:44.15 0.1 undecidable manual S 148 0.2527 50 -0.1 99
MN.CLTB.HHZ. 2021-10-12T21:00:44.93 0.1 undecidable manual S 124 0.2716 50 0.12 98
IV.MBFT.HHZ. 2021-10-12T21:00:43.04 0.1 undecidable manual S 5 0.2158 50 -0.12 100
IV.SCIAC.HHZ. 2021-10-12T21:00:40.04 0.6 positive manual P 148 0.2527 50 0 51
MN.CLTB.HHZ. 2021-10-12T21:00:40.27 0.6 positive manual P 124 0.2716 50 -0.09 50
IV.MBFT.HHZ. 2021-10-12T21:00:39.54 0.6 negative manual P 5 0.2158 50 0.14 50
IV.MMGO.HNZ. 2021-10-12T21:00:38.91 0.1 undecidable manual S 152 0.0773 142 -0.22 100
IV.MMGO.HNZ. 2021-10-12T21:00:37.36 0.1 negative manual P 152 0.0773 142 0.28 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMGO.HNE. ML:1.9 0.001089 1.92 AML other m 2021-10-12T21:00:38.99
IV.MMGO.HHE. ML:1.9 0.001105 1.92 AML other m 2021-10-12T21:00:38.99
IV.MMGO.HHN. ML:2.1 0.001715 1.88 AML other m 2021-10-12T21:00:39.03
IV.MMGO.HNN. ML:2.1 0.00172 1.88 AML other m 2021-10-12T21:00:39.03
IV.MBFT.HHE. ML:1 6.36E-5 0.7 AML other m 2021-10-12T21:00:43.46
IV.MBFT.HHN. ML:1 5.69E-5 0.32 AML other m 2021-10-12T21:00:43.88
IV.SCIAC.HHE. ML:1.3 9.835E-5 0.42 AML other m 2021-10-12T21:00:45.54
IV.SCIAC.HHN. ML:1.3 9.345E-5 0.16 AML other m 2021-10-12T21:00:46.06
MN.CLTB.HHE. ML:1.9 0.0003975 0.44 AML other m 2021-10-12T21:00:46.16
MN.CLTB.HHN. ML:2.2 0.0007095 0.3 AML other m 2021-10-12T21:00:47.27
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