Earthquake with magnitude of ML 1.8 on date 24-09-2021 and time 09:49:29 (Italy) in region 3 km S Castiglione di Sicilia (CT)

A magnitude ML 1.8 earthquake occured in region: 3 km S Castiglione di Sicilia (CT), on

  • 24-09-2021 07:49:29 (UTC)
  • 24-09-2021 09:49:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.858, 15.119 at 27 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
Castiglione di Sicilia CT 3 3215 3215
Linguaglossa CT 3 5403 8618
Francavilla di Sicilia ME 5 3945 12563
Motta Camastra ME 6 845 13408
Piedimonte Etneo CT 8 3963 17371
Moio Alcantara ME 8 717 18088
Malvagna ME 9 733 18821
Gaggi ME 9 3184 22005
Graniti ME 10 1492 23497
Calatabiano CT 10 5308 28805
Fiumefreddo di Sicilia CT 11 9623 38428
Roccella Valdemone ME 13 666 39094
Sant'Alfio CT 13 1582 40676
Mascali CT 13 14282 54958
Castelmola ME 14 1088 56046
Giardini-Naxos ME 14 9415 65461
Taormina ME 15 10960 76421
Mongiuffi Melia ME 15 600 77021
Milo CT 15 1087 78108
Fondachelli-Fantina ME 15 1019 79127
Santa Domenica Vittoria ME 15 980 80107
Giarre CT 15 27659 107766
Randazzo CT 15 10900 118666
Roccafiorita ME 15 197 118863
Riposto CT 16 14838 133701
Gallodoro ME 16 367 134068
Limina ME 16 836 134904
Letojanni ME 17 2861 137765
Antillo ME 17 919 138684
Novara di Sicilia ME 18 1337 140021
Zafferana Etnea CT 18 9517 149538
Santa Venerina CT 19 8592 158130

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km N of Acireale (52622 inhabitants)
40 Km N of Catania (314555 inhabitants)
54 Km SW of Messina (238439 inhabitants)
54 Km SW of Reggio di Calabria (183035 inhabitants)
90 Km N of Siracusa (122291 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 2021-09-24
07:49:29
37.8582 15.1193 27 2021-09-24
08:06:07
Sala Sismica INGV-Roma 95816091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 07:49:29 ± 0.47
Latitude 37.8582 ± 0.0144
Longitude 15.1193 ± 0.0330
Depth (km) 27 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95816091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2689
Semi-minor axis of confidence ellipse (meter) 1442
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 2690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.86605
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 95816091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 08:06:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RESU.HHZ. 2021-09-24T07:49:46.63 0.1 undecidable manual P 256 0.866 101 0.68 74
IV.MUCR.HHZ. 2021-09-24T07:49:41.21 0.3 undecidable manual S 314 0.2671 127 -0.19 72
IV.HAGA.HHZ. 2021-09-24T07:49:40.97 0.6 positive manual P 177 0.5738 107 -0.12 45
IV.EMFO.HHZ. 2021-09-24T07:49:39.36 0.3 undecidable manual S 191 0.1241 150 0.81 60
IV.NOV.HHZ. 2021-09-24T07:49:39.89 0.3 undecidable manual S 5 0.17 141 0.57 65
IV.ECTS.HHZ. 2021-09-24T07:49:37.16 0.3 undecidable manual S 3 0.0243 174 -0.45 71
IV.MUCR.HHZ. 2021-09-24T07:49:36.23 0.1 negative manual P 314 0.2671 127 -0.14 96
IV.NOV.HHZ. 2021-09-24T07:49:35.63 0.1 undecidable manual P 5 0.17 141 0.47 91
IV.EMFO.HHZ. 2021-09-24T07:49:34.16 0.3 undecidable manual P 191 0.1241 150 -0.56 66
IV.EMSG.HHZ. 2021-09-24T07:49:34.53 0.1 undecidable manual P 254 0.1385 147 -0.32 95
IV.EMCN.HNZ. 2021-09-24T07:49:34.28 0.1 undecidable manual P 225 0.0953 156 -0.22 98
IV.ECTS.HHZ. 2021-09-24T07:49:34.01 0.1 undecidable manual P 3 0.0243 174 -0.17 100
IV.EPIT.HHZ. 2021-09-24T07:49:34.21 0.1 undecidable manual P 227 0.0683 163 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPIT.HHN. ML:1.9 0.000449 0.38 AML other m 2021-09-24T07:49:38.39
IV.EPIT.HHE. ML:1.7 0.0002625 0.72 AML other m 2021-09-24T07:49:48.07
IV.EMSG.HHN. ML:1.8 0.00029148125 0.9408 AML other m 2021-09-24T07:49:50.23
IV.EMSG.HHE. ML:1.8 0.0003126587 0.6144 AML other m 2021-09-24T07:49:49.93
IV.MUCR.HHE. ML:0.9 3.084531E-5 0.3456 AML other m 2021-09-24T07:49:41.69
IV.MUCR.HHN. ML:1 4.031554E-5 0.416 AML other m 2021-09-24T07:49:41.76
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