Earthquake with magnitude of ML 1.8 on date 17-09-2020 and time 12:00:06 (Italy) in region 3 km W Sant'Alfio (CT)

A magnitude ML 1.8 earthquake occured in region: 3 km W Sant'Alfio (CT), on

  • 17-09-2020 10:00:06 (UTC)
  • 17-09-2020 12:00:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.75, 15.11 at 6 km depth.

The earthquake was located by: Sala Operativa INGV_OE (Catania).

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
Sant'Alfio CT 3 1582 1582
Milo CT 3 1087 2669
Zafferana Etnea CT 7 9517 12186
Giarre CT 7 27659 39845
Mascali CT 7 14282 54127
Santa Venerina CT 8 8592 62719
Piedimonte Etneo CT 8 3963 66682
Riposto CT 8 14838 81520
Fiumefreddo di Sicilia CT 10 9623 91143
Linguaglossa CT 10 5403 96546
Calatabiano CT 13 5308 101854
Castiglione di Sicilia CT 15 3215 105069
Gaggi ME 15 3184 108253
Trecastagni CT 15 10910 119163
Pedara CT 16 14102 133265
Viagrande CT 16 8563 141828
Acireale CT 16 52622 194450
Aci Sant'Antonio CT 16 17984 212434
Francavilla di Sicilia ME 17 3945 216379
Motta Camastra ME 17 845 217224
Aci Catena CT 17 29851 247075
Moio Alcantara ME 17 717 247792
Aci Bonaccorsi CT 17 3524 251316
Nicolosi CT 17 7463 258779
Giardini-Naxos ME 17 9415 268194
Graniti ME 18 1492 269686
Castelmola ME 19 1088 270774
Taormina ME 19 10960 281734
Malvagna ME 19 733 282467
Valverde CT 19 7840 290307
San Giovanni la Punta CT 20 23060 313367
Tremestieri Etneo CT 20 20589 333956

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km N of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
63 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
97 Km E of Caltanissetta (63360 inhabitants)
98 Km NE of Ragusa (73313 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
Reviewed
Rev200
ML 1.8 2020-09-17
10:00:06
37.75 15.11 6 2020-09-17
10:13:36
Sala Operativa INGV_OE (Catania) 82978511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-17 10:00:06
Latitude 37.75
Longitude 15.11
Depth (km) 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT#SeismPicker_SO-OE
Event type earthquake
Origin ID 82978511

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 82978511
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-09-17 10:13:36
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