Earthquake with magnitude of ML 1.7 on date 20-06-2021 and time 12:51:41 (UTC) in region 1 km NE Nicolosi (CT)

A magnitude ML 1.7 earthquake occured in region: 1 km NE Nicolosi (CT), on

  • 20-06-2021 12:51:41 (UTC)
  • 20-06-2021 14:51:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.621, 15.036 at 7 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
Nicolosi CT 1 7463 7463
Pedara CT 2 14102 21565
Trecastagni CT 4 10910 32475
San Pietro Clarenza CT 5 7743 40218
Mascalucia CT 5 31958 72176
Viagrande CT 6 8563 80739
Tremestieri Etneo CT 6 20589 101328
Belpasso CT 6 28108 129436
Camporotondo Etneo CT 6 5023 134459
Aci Bonaccorsi CT 7 3524 137983
Gravina di Catania CT 7 25838 163821
San Giovanni la Punta CT 7 23060 186881
Sant'Agata li Battiati CT 8 9479 196360
Aci Sant'Antonio CT 8 17984 214344
Ragalna CT 9 3924 218268
San Gregorio di Catania CT 9 11966 230234
Valverde CT 9 7840 238074
Aci Catena CT 10 29851 267925
Zafferana Etnea CT 10 9517 277442
Misterbianco CT 11 49410 326852
Acireale CT 12 52622 379474
Santa Venerina CT 12 8592 388066
Aci Castello CT 12 18723 406789
PaternĂ² CT 13 48228 455017
Santa Maria di Licodia CT 13 7641 462658
Motta Sant'Anastasia CT 13 12116 474774
Milo CT 14 1087 475861
Catania CT 14 314555 790416
Biancavilla CT 15 24007 814423
Sant'Alfio CT 17 1582 816005
Giarre CT 18 27659 843664
Adrano CT 18 36122 879786
Riposto CT 19 14838 894624

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km W of Acireale (52622 inhabitants)
14 Km NW of Catania (314555 inhabitants)
66 Km NW of Siracusa (122291 inhabitants)
76 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
82 Km NE of Ragusa (73313 inhabitants)
87 Km NE of Vittoria (63339 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
88 Km N of Modica (54633 inhabitants)
93 Km NE of Gela (75827 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
Rev200
ML 1.7 2021-06-20
12:51:41
37.621 15.036 7 2021-09-16
15:06:09
Sala Operativa INGV_OE (Catania) 91600541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-20 12:51:41
Latitude 37.6210
Longitude 15.0360
Depth (km) 7 (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 91600541

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) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
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) 0.21
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 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 91600541
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-06-20 13:07:45
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