Earthquake with magnitude of ML 1.7 on date 01-06-2021 and time 01:52:33 (Italy) in region Costa Catanese (Catania)

A magnitude ML 1.7 earthquake occured in region: Costa Catanese (Catania), on

  • 31-05-2021 23:52:33 (UTC)
  • 01-06-2021 01:52:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.444, 15.523 at 29 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Acireale (52622 inhabitants)
39 Km E of Catania (314555 inhabitants)
47 Km NE of Siracusa (122291 inhabitants)
75 Km S of Reggio di Calabria (183035 inhabitants)
84 Km S of Messina (238439 inhabitants)
91 Km NE of Ragusa (73313 inhabitants)
94 Km NE 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 2021-05-31
37.4438 15.5228 29 2021-05-31
Sala Sismica INGV-Roma 90672211
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-05-31 23:52:33 ± 0.38
Latitude 37.4438 ± 0.0234
Longitude 15.5228 ± 0.0170
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90672211


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2631
Semi-minor axis of confidence ellipse (meter) 1399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 2630
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 308
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.33275
Epicentral distance of station farthest from the epicenter (degree) 0.83097
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information


Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 90672211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 23:57:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HPAC.HHZ. 2021-05-31T23:53:00.88 0.1 undecidable manual S 208 0.831 103 -0.17 87
IV.HVZN.HHZ. 2021-05-31T23:52:57.74 1.0 undecidable manual S 248 0.6943 105 0.61 22
IV.HAVL.HHZ. 2021-05-31T23:52:54.17 0.1 undecidable manual S 214 0.5801 109 0.3 95
IV.HLNI.HHZ. 2021-05-31T23:52:51.64 0.1 undecidable manual S 260 0.5252 111 -0.72 75
IV.SSY.HHZ. 2021-05-31T23:52:50.69 0.1 undecidable manual S 231 0.4578 114 0.19 100
IV.HCRL.HHZ. 2021-05-31T23:52:49.55 0.1 undecidable manual S 248 0.4218 116 0.02 97
IV.HPAC.HHZ. 2021-05-31T23:52:48.71 1.0 positive manual P 208 0.831 103 -0.68 19
IV.HVZN.HHZ. 2021-05-31T23:52:47.57 0.1 undecidable manual P 248 0.6943 105 0.44 88
IV.HAGA.HHZ. 2021-05-31T23:52:47.25 0.1 undecidable manual S 242 0.3327 123 0.02 99
IV.HAVL.HHZ. 2021-05-31T23:52:45.41 0.6 negative manual P 214 0.5801 109 0.16 47
IV.HLNI.HHZ. 2021-05-31T23:52:44.19 0.6 negative manual P 260 0.5252 111 -0.19 47
IV.SSY.HHZ. 2021-05-31T23:52:43.34 0.1 positive manual P 231 0.4578 114 0.05 100
IV.HCRL.HHZ. 2021-05-31T23:52:42.85 0.1 positive manual P 248 0.4218 116 0.11 99
IV.HAGA.HHZ. 2021-05-31T23:52:41.40 0.6 positive manual P 242 0.3327 123 -0.01 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HCRL.HHN. ML:1.6 8.38E-5 0.14 AML other m 2021-05-31T23:52:49.64
IV.HCRL.HHE. ML:1.6 9.97E-5 0.1 AML other m 2021-05-31T23:52:50.59
IV.SSY.HHN. ML:2.3 0.000424 1.08 AML other m 2021-05-31T23:52:51.41
IV.HLNI.HHN. ML:1.3 3.48E-5 1.1 AML other m 2021-05-31T23:52:51.77
IV.HLNI.HHE. ML:1.3 3.935E-5 0.9 AML other m 2021-05-31T23:52:52.22
IV.SSY.HHE. ML:1.9 0.0001745 0.66 AML other m 2021-05-31T23:52:53.49
IV.HAVL.HHN. ML:1.7 7.78E-5 1.12 AML other m 2021-05-31T23:52:56.99
IV.HVZN.HHE. ML:1.8 9.205E-5 0.56 AML other m 2021-05-31T23:52:59.47
IV.HVZN.HHN. ML:1.9 9.795E-5 1.2 AML other m 2021-05-31T23:52:59.90
IV.HAVL.HHE. ML:1.6 6.285E-5 0.48 AML other m 2021-05-31T23:53:10.92
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