Earthquake with magnitude of ML 1.6 on date 28-06-2021 and time 02:29:35 (Italy) in region Mar Ionio Meridionale (MARE)

A magnitude ML 1.6 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 28-06-2021 00:29:35 (UTC)
  • 28-06-2021 02:29:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.355, 15.667 at 5 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
47 Km NE of Siracusa (122291 inhabitants)
53 Km SE of Acireale (52622 inhabitants)
54 Km E of Catania (314555 inhabitants)
84 Km S of Reggio di Calabria (183035 inhabitants)
94 Km S of Messina (238439 inhabitants)
96 Km NE of Ragusa (73313 inhabitants)
97 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 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 ( 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
ML 1.6 2021-06-28
37.3547 15.6672 5 2021-06-28
Sala Sismica INGV-Roma 91981321
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-06-28 00:29:35 ± 0.23
Latitude 37.3547 ± 0.0090
Longitude 15.6672 ± 0.0124
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 91981321


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1146
Semi-minor axis of confidence ellipse (meter) 651
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 312
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 257
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.41279
Epicentral distance of station farthest from the epicenter (degree) 0.70507
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 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 91981321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-28 00:38:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-06-28T00:29:57.05 0.6 undecidable manual S 228 0.5873 50 0.31 61
IV.HLNI.HHZ. 2021-06-28T00:29:57.77 0.6 undecidable manual S 270 0.6313 50 -0.3 60
IV.SSY.HHZ. 2021-06-28T00:29:54.45 0.6 undecidable manual S 248 0.5117 50 -0.05 65
IV.HCRL.HHZ. 2021-06-28T00:29:54.65 0.6 undecidable manual S 262 0.509 50 0.21 63
IV.HSRS.HNZ. 2021-06-28T00:29:52.42 0.6 undecidable manual S 234 0.4407 50 0.02 66
IV.HAGA.HHZ. 2021-06-28T00:29:51.57 0.6 undecidable manual S 260 0.4128 96 0.08 66
IV.AIO.HHE. 2021-06-28T00:29:50.00 0.3 undecidable manual P 331 0.7051 50 0.21 90
IV.HLNI.HHZ. 2021-06-28T00:29:48.21 0.3 undecidable manual P 270 0.6313 50 -0.32 90
IV.HAVL.HHZ. 2021-06-28T00:29:47.64 0.3 undecidable manual P 228 0.5873 50 -0.12 94
IV.SSY.HHZ. 2021-06-28T00:29:46.15 0.3 undecidable manual P 248 0.5117 50 -0.32 92
IV.HCRL.HHZ. 2021-06-28T00:29:46.65 0.3 undecidable manual P 262 0.509 50 0.21 94
IV.HSRS.HNZ. 2021-06-28T00:29:45.37 0.3 undecidable manual P 234 0.4407 50 0.11 98
IV.HAGA.HHZ. 2021-06-28T00:29:44.75 0.3 undecidable manual P 260 0.4128 96 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAGA.HHN. ML:1.2 4.75E-5 0.08 AML other m 2021-06-28T00:29:52.15
IV.HAGA.HHE. ML:1.1 4.1247605E-5 0.14 AML other m 2021-06-28T00:29:51.92
IV.HCRL.HHE. ML:1.6 0.00010125 1.84 AML other m 2021-06-28T00:29:54.93
IV.HCRL.HHN. ML:1.3 4.44E-5 1.34 AML other m 2021-06-28T00:29:57.08
IV.HAVL.HHN. ML:1.6 7.8241235E-5 0.12 AML other m 2021-06-28T00:29:57.85
IV.HAVL.HHE. ML:1.6 7.881769E-5 0.18 AML other m 2021-06-28T00:29:57.62
IV.HLNI.HHE. ML:1.8 9.494556E-5 0.2 AML other m 2021-06-28T00:29:57.94
IV.HLNI.HHN. ML:1.7 8.039484E-5 0.28 AML other m 2021-06-28T00:29:57.96
IV.SSY.HHE. ML:1.6 8.6004485E-5 0.1 AML other m 2021-06-28T00:29:56.35
IV.SSY.HHN. ML:1.9 0.00018792305 0.2 AML other m 2021-06-28T00:29:55.58
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