Earthquake with magnitude of ML 1.6 on date 21-09-2021 and time 16:21:34 (UTC) in region 11 km W Milo (CT)

A magnitude ML 1.6 earthquake occured in region: 11 km W Milo (CT), on

  • 21-09-2021 16:21:34 (UTC)
  • 21-09-2021 18:21:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.751, 14.995 at 0 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
Milo CT 11 1087 1087
Zafferana Etnea CT 11 9517 10604
Sant'Alfio CT 13 1582 12186
Ragalna CT 14 3924 16110
Maletto CT 14 3920 20030
Santa Venerina CT 15 8592 28622
Bronte CT 15 19172 47794
Randazzo CT 15 10900 58694
Nicolosi CT 15 7463 66157
Pedara CT 16 14102 80259
Biancavilla CT 16 24007 104266
Trecastagni CT 17 10910 115176
Linguaglossa CT 17 5403 120579
Giarre CT 17 27659 148238
Adrano CT 17 36122 184360
Moio Alcantara ME 17 717 185077
Piedimonte Etneo CT 17 3963 189040
Santa Maria di Licodia CT 18 7641 196681
Mascali CT 18 14282 210963
Belpasso CT 18 28108 239071
Viagrande CT 18 8563 247634
Riposto CT 19 14838 262472
Santa Domenica Vittoria ME 19 980 263452
Castiglione di Sicilia CT 19 3215 266667
Fiumefreddo di Sicilia CT 19 9623 276290
Malvagna ME 20 733 277023
Aci Sant'Antonio CT 20 17984 295007
Aci Bonaccorsi CT 20 3524 298531
San Pietro Clarenza CT 20 7743 306274

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
81 Km NW of Siracusa (122291 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
95 Km N of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 inhabitants)
Recent and historical seismicity
Seismic hazard
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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 1.6 2021-09-21
37.751 14.995 0 2021-09-21
Sala Operativa INGV_OE (Catania) 95708261
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-09-21 16:21:34
Latitude 37.7510
Longitude 14.9950
Depth (km) 0 (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 95708261


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) 500
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
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) 0.1
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


Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 95708261
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-09-21 16:34:21
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download