Earthquake with magnitude of ML 1.7 on date 21-11-2020 and time 08:38:38 (UTC) in region 1 km N Zafferana Etnea (CT)

A magnitude ML 1.7 earthquake occured in region: 1 km N Zafferana Etnea (CT), on

  • 21-11-2020 08:38:38 (UTC)
  • 21-11-2020 09:38:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7, 15.1 at 4 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
Zafferana Etnea CT 1 9517 9517
Milo CT 3 1087 10604
Santa Venerina CT 4 8592 19196
Sant'Alfio CT 6 1582 20778
Giarre CT 8 27659 48437
Riposto CT 9 14838 63275
Trecastagni CT 10 10910 74185
Pedara CT 10 14102 88287
Mascali CT 10 14282 102569
Viagrande CT 10 8563 111132
Aci Sant'Antonio CT 11 17984 129116
Acireale CT 11 52622 181738
Aci Bonaccorsi CT 12 3524 185262
Aci Catena CT 12 29851 215113
Nicolosi CT 12 7463 222576
Piedimonte Etneo CT 14 3963 226539
Fiumefreddo di Sicilia CT 14 9623 236162
Valverde CT 14 7840 244002
San Giovanni la Punta CT 14 23060 267062
Tremestieri Etneo CT 14 20589 287651
Mascalucia CT 15 31958 319609
San Gregorio di Catania CT 15 11966 331575
Linguaglossa CT 16 5403 336978
San Pietro Clarenza CT 16 7743 344721
Gravina di Catania CT 16 25838 370559
Sant'Agata li Battiati CT 16 9479 380038
Ragalna CT 17 3924 383962
Belpasso CT 17 28108 412070
Aci Castello CT 17 18723 430793
Camporotondo Etneo CT 17 5023 435816
Calatabiano CT 17 5308 441124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NW of Acireale (52622 inhabitants)
22 Km N of Catania (314555 inhabitants)
66 Km SW of Reggio di Calabria (183035 inhabitants)
68 Km SW of Messina (238439 inhabitants)
73 Km N of Siracusa (122291 inhabitants)
92 Km NE of Ragusa (73313 inhabitants)
95 Km E of Caltanissetta (63360 inhabitants)
98 Km NE of Vittoria (63339 inhabitants)
99 Km N of Modica (54633 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 1.7 2020-11-21
08:38:38
37.7 15.1 5 2020-11-21
08:46:25
Sala Operativa INGV_OE (Catania) 84904651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-21 08:38:38
Latitude 37.70
Longitude 15.10
Depth (km) 5 (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 84904651

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) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
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) 0.12
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:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 84904651
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-11-21 08:46:25
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