Earthquake with magnitude of ML 1.6 on date 06-12-2021 and time 04:49:32 (Italy) in region 6 km SE Cassaro (SR)

A magnitude ML 1.6 earthquake occured in region: 6 km SE Cassaro (SR), on

  • 06-12-2021 03:49:32 (UTC)
  • 06-12-2021 04:49:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.056, 14.974 at 27 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cassaro SR 6 821 821
Palazzolo Acreide SR 6 8808 9629
Ferla SR 8 2523 12152
Canicattini Bagni SR 8 7109 19261
Buscemi SR 9 1051 20312
Sortino SR 13 8690 29002
Buccheri SR 14 1999 31001
Solarino SR 14 8091 39092
Giarratana RG 16 3048 42140
Floridia SR 16 22762 64902
Monterosso Almo RG 19 3032 67934
Melilli SR 19 13621 81555
Noto SR 20 23913 105468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NE of Ragusa (73313 inhabitants)
28 Km W of Siracusa (122291 inhabitants)
29 Km NE of Modica (54633 inhabitants)
40 Km E of Vittoria (63339 inhabitants)
51 Km S of Catania (314555 inhabitants)
64 Km E of Gela (75827 inhabitants)
64 Km S of Acireale (52622 inhabitants)
94 Km SE of Caltanissetta (63360 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 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 http://www.hsit.it. 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
Reviewed
Rev100
ML 1.6 2021-12-06
03:49:32
37.0558 14.9735 27 2021-12-06
03:58:02
Sala Sismica INGV-Roma 98200261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-06 03:49:32 ± 0.13
Latitude 37.0558 ± 0.0036
Longitude 14.9735 ± 0.0056
Depth (km) 27 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98200261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 471
Semi-minor axis of confidence ellipse (meter) 185
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 470
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.1295
Epicentral distance of station farthest from the epicenter (degree) 0.36602
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 98200261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-06 03:58:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HVIT.HHZ. 2021-12-06T03:49:46.89 0.3 undecidable manual S 260 0.366 118 0.03 73
IV.ISPIC.EHZ. 2021-12-06T03:49:44.56 0.3 undecidable manual S 192 0.2806 126 -0.15 72
IV.HAGA.HHZ. 2021-12-06T03:49:44.14 0.3 undecidable manual S 32 0.2707 127 -0.33 71
IV.HLNI.HHZ. 2021-12-06T03:49:44.82 0.3 undecidable manual S 345 0.3031 123 -0.44 68
IV.HVZN.HHZ. 2021-12-06T03:49:43.95 0.3 undecidable manual S 301 0.2392 131 0.21 73
IT.LNT.HGZ. 2021-12-06T03:49:43.69 0.3 undecidable manual S 6 0.2338 132 0.08 74
IV.HCRL.HHZ. 2021-12-06T03:49:43.71 0.3 undecidable manual S 12 0.232 132 0.13 73
IV.HSRS.HHZ. 2021-12-06T03:49:42.75 0.3 undecidable manual S 79 0.2014 136 -0.18 74
IV.HMDC.HHZ. 2021-12-06T03:49:42.30 0.3 undecidable manual S 238 0.1799 140 -0.2 73
IV.SSY.HHZ. 2021-12-06T03:49:41.77 0.3 undecidable manual S 38 0.1295 149 0.14 74
IV.HVIT.HHZ. 2021-12-06T03:49:40.70 0.1 undecidable manual P 260 0.366 118 -0.06 96
IV.HLNI.HHZ. 2021-12-06T03:49:39.72 0.1 undecidable manual P 345 0.3031 123 -0.12 96
IV.HVZN.HHZ. 2021-12-06T03:49:39.11 0.1 undecidable manual P 301 0.2392 131 0.14 98
IV.ISPIC.EHZ. 2021-12-06T03:49:39.62 0.1 undecidable manual P 192 0.2806 126 0.09 98
IV.HAGA.HHZ. 2021-12-06T03:49:39.34 0.1 undecidable manual P 32 0.2707 127 -0.05 99
IT.LNT.HGZ. 2021-12-06T03:49:39.06 0.1 undecidable manual P 6 0.2338 132 0.17 97
IV.HCRL.HHZ. 2021-12-06T03:49:38.99 0.1 undecidable manual P 12 0.232 132 0.12 98
IV.HSRS.HHZ. 2021-12-06T03:49:38.56 0.1 undecidable manual P 79 0.2014 136 0.06 99
IV.HMDC.HHZ. 2021-12-06T03:49:38.20 0.1 undecidable manual P 238 0.1799 140 -0.05 100
IV.SSY.HHZ. 2021-12-06T03:49:37.89 0.1 undecidable manual P 38 0.1295 149 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HHN. ML:2 0.00051548215 0.0992 AML other m 2021-12-06T03:49:41.82
IV.HCRL.HHN. ML:1.6 0.00015395 0.56 AML other m 2021-12-06T03:49:43.76
IV.HCRL.HHE. ML:1.9 0.0002795 0.2 AML other m 2021-12-06T03:49:43.87
IV.SSY.HHE. ML:1.6 0.0001805182 0.16 AML other m 2021-12-06T03:49:43.32
IV.HLNI.HHE. ML:1.8 0.000219 0.16 AML other m 2021-12-06T03:49:45.01
IV.HLNI.HHN. ML:1.7 0.00015 0.14 AML other m 2021-12-06T03:49:45.11
IV.SSY.HNE. ML:1.5 0.0001573845 0.1888 AML other m 2021-12-06T03:49:42.04
IV.SSY.HNN. ML:1.5 0.000156473795 0.128 AML other m 2021-12-06T03:49:41.83
IV.HMDC.HHE. ML:1.4 0.00010110454 0.1408 AML other m 2021-12-06T03:49:42.47
IV.HMDC.HHN. ML:1.4 0.00010536842 0.1824 AML other m 2021-12-06T03:49:42.34
IV.HMDC.HNN. ML:1.5 0.000136823455 0.272 AML other m 2021-12-06T03:49:42.34
IV.HSRS.HHE. ML:1.3 8.3156645E-5 0.24 AML other m 2021-12-06T03:49:43.19
IV.HAGA.HHE. ML:1.4 8.8354695E-5 0.0768 AML other m 2021-12-06T03:49:44.70
IV.HAGA.HHN. ML:1.4 8.063913E-5 0.0576 AML other m 2021-12-06T03:49:44.63
IV.ISPIC.EHE. ML:1.6 0.00015588765 0.24 AML other m 2021-12-06T03:49:44.83
IV.ISPIC.EHN. ML:1.7 0.000168898335 0.0832 AML other m 2021-12-06T03:49:44.65
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