Earthquake with magnitude of ML 1.8 on date 06-09-2021 and time 10:23:43 (Italy) in region 7 km E Mirabella Imbaccari (CT)

A magnitude ML 1.8 earthquake occured in region: 7 km E Mirabella Imbaccari (CT), on

  • 06-09-2021 08:23:43 (UTC)
  • 06-09-2021 10:23:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.336, 14.527 at 32 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
Mirabella Imbaccari CT 7 4912 4912
San Michele di Ganzaria CT 11 3245 8157
Caltagirone CT 11 38686 46843
Aidone EN 11 4889 51732
San Cono CT 15 2697 54429
Piazza Armerina EN 15 21886 76315
Raddusa CT 15 3178 79493
Ramacca CT 16 10894 90387
Mineo CT 17 5159 95546
Grammichele CT 17 13418 108964
Palagonia CT 19 16608 125572

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NE of Gela (75827 inhabitants)
43 Km N of Vittoria (63339 inhabitants)
45 Km E of Caltanissetta (63360 inhabitants)
49 Km NW of Ragusa (73313 inhabitants)
53 Km W of Catania (314555 inhabitants)
57 Km NW of Modica (54633 inhabitants)
64 Km SW of Acireale (52622 inhabitants)
75 Km W of Siracusa (122291 inhabitants)
83 Km E 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 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 1.8 2021-09-06
08:23:43
37.3363 14.5267 32 2021-09-06
08:41:06
Sala Sismica INGV-Roma 95100641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-06 08:23:43 ± 0.38
Latitude 37.3363 ± 0.0144
Longitude 14.5267 ± 0.0136
Depth (km) 32 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95100641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1417
Semi-minor axis of confidence ellipse (meter) 905
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 1420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.17357
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 95100641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-06 08:41:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-09-06T08:24:02.77 0.6 undecidable manual S 96 0.5018 115 0.26 46
IV.SSY.HHZ. 2021-09-06T08:24:02.36 0.3 undecidable manual S 112 0.4703 116 0.69 60
IV.ACATE.EHE. 2021-09-06T08:23:58.31 1.0 undecidable manual S 184 0.313 128 0.6 22
IV.HVIT.HHE. 2021-09-06T08:23:58.50 0.3 undecidable manual S 181 0.3435 125 0.06 76
IV.HLNI.HHZ. 2021-09-06T08:23:56.12 0.3 undecidable manual S 87 0.2743 132 -0.72 63
IV.HVZN.HHZ. 2021-09-06T08:23:55.63 0.3 undecidable manual S 136 0.2176 139 -0.04 77
IV.SSY.HHZ. 2021-09-06T08:23:54.24 1.0 positive manual P 112 0.4703 116 0.07 24
IV.RAFF.HHZ. 2021-09-06T08:23:54.87 0.3 undecidable manual S 229 0.1736 146 0 76
IV.HAGA.HHZ. 2021-09-06T08:23:54.47 0.6 negative manual P 96 0.5018 115 -0.19 48
IV.HCRL.HHZ. 2021-09-06T08:23:53.82 0.1 undecidable manual P 97 0.4056 121 0.62 84
IV.CPTP.HHZ. 2021-09-06T08:23:52.34 0.1 undecidable manual P 284 0.2977 130 0.66 91
IV.GALF.HHZ. 2021-09-06T08:23:52.88 0.3 negative manual P 5 0.375 123 0.12 75
IV.HVIT.HHE. 2021-09-06T08:23:52.07 0.3 undecidable manual P 181 0.3435 125 -0.23 73
IV.ACATE.EHE. 2021-09-06T08:23:51.83 0.6 undecidable manual P 184 0.313 128 -0.05 51
IV.HLNI.HHZ. 2021-09-06T08:23:50.79 0.1 undecidable manual P 87 0.2743 132 -0.6 90
IV.HVZN.HHZ. 2021-09-06T08:23:50.49 0.1 undecidable manual P 136 0.2176 139 -0.22 100
IV.RAFF.HHZ. 2021-09-06T08:23:49.68 0.1 undecidable manual P 229 0.1736 146 -0.56 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAFF.HHE. ML:0 0.000225 1.76 AML other m 2021-09-06T08:23:54.05
IV.RAFF.HHN. ML:0 0.0002815 0.26 AML other m 2021-09-06T08:23:55.17
IV.HVZN.HHE. ML:1.9 0.00031509921565 0.2368 AML other m 2021-09-06T08:23:55.99
IV.HVZN.HNE. ML:1.7 0.00018272285 0.1344 AML other m 2021-09-06T08:23:56.37
IV.HLNI.HHN. ML:1.5 0.0001062 1.38 AML other m 2021-09-06T08:23:56.22
IV.HLNI.HHE. ML:1.5 9.74E-5 0.9 AML other m 2021-09-06T08:23:56.19
IV.HVZN.HNN. ML:2 0.0003241908 0.3328 AML other m 2021-09-06T08:23:56.57
IV.HVZN.HHN. ML:2 0.0004055 0.82 AML other m 2021-09-06T08:23:56.98
IV.GALF.HHE. ML:1.6 0.000106054445 0.4416 AML other m 2021-09-06T08:24:01.12
IV.SSY.HHE. ML:2 0.00017954494 0.1408 AML other m 2021-09-06T08:24:03.69
IV.SSY.HHN. ML:2.3 0.00041820551 0.1216 AML other m 2021-09-06T08:24:06.25
IV.HAGA.HHN. ML:1.4 4.355665E-5 0.0832 AML other m 2021-09-06T08:24:04.76
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