Earthquake with magnitude of ML 1.7 on date 01-09-2021 and time 18:09:07 (Italy) in region 9 km E Troina (EN)

A magnitude ML 1.7 earthquake occured in region: 9 km E Troina (EN), on

  • 01-09-2021 16:09:07 (UTC)
  • 01-09-2021 18:09:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.758, 14.702 at 26 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
Troina EN 9 9373 9373
CesarĂ² ME 10 2439 11812
San Teodoro ME 10 1403 13215
Bronte CT 12 19172 32387
Regalbuto EN 13 7277 39664
Maniace CT 15 3765 43429
Gagliano Castelferrato EN 16 3593 47022
Centuripe EN 16 5470 52492
Adrano CT 16 36122 88614
Maletto CT 17 3920 92534
Cerami EN 18 2006 94540
Agira EN 19 8345 102885
Biancavilla CT 20 24007 126892

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Acireale (52622 inhabitants)
44 Km NW of Catania (314555 inhabitants)
64 Km E of Caltanissetta (63360 inhabitants)
87 Km NE of Gela (75827 inhabitants)
89 Km SW of Messina (238439 inhabitants)
91 Km N of Vittoria (63339 inhabitants)
92 Km W of Reggio di Calabria (183035 inhabitants)
93 Km N of Ragusa (73313 inhabitants)
94 Km NW of Siracusa (122291 inhabitants)
100 Km N of Modica (54633 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 1.7 2021-09-01
37.758 14.702 26 2021-09-01
Sala Operativa INGV_OE (Catania) 94924381
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-09-01 16:09:07
Latitude 37.7580
Longitude 14.7020
Depth (km) 26 (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 94924381


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


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
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) 0.25
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 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 94924381
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-09-01 16:20:59
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