Earthquake with magnitude of ML 1.9 on date 12-10-2021 and time 09:31:48 (Italy) in region 2 km S Zafferana Etnea (CT)

A magnitude ML 1.9 earthquake occured in region: 2 km S Zafferana Etnea (CT), on

  • 12-10-2021 07:31:48 (UTC)
  • 12-10-2021 09:31:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.68, 15.101 at 10 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
Zafferana Etnea CT 2 9517 9517
Santa Venerina CT 4 8592 18109
Milo CT 5 1087 19196
Trecastagni CT 7 10910 30106
Viagrande CT 8 8563 38669
Pedara CT 8 14102 52771
Sant'Alfio CT 8 1582 54353
Aci Sant'Antonio CT 8 17984 72337
Aci Bonaccorsi CT 9 3524 75861
Aci Catena CT 9 29851 105712
Giarre CT 9 27659 133371
Acireale CT 9 52622 185993
Nicolosi CT 10 7463 193456
Riposto CT 11 14838 208294
San Giovanni la Punta CT 11 23060 231354
Valverde CT 11 7840 239194
Tremestieri Etneo CT 12 20589 259783
Mascali CT 12 14282 274065
Mascalucia CT 13 31958 306023
San Gregorio di Catania CT 13 11966 317989
Sant'Agata li Battiati CT 14 9479 327468
Gravina di Catania CT 14 25838 353306
San Pietro Clarenza CT 14 7743 361049
Aci Castello CT 14 18723 379772
Belpasso CT 15 28108 407880
Camporotondo Etneo CT 15 5023 412903
Ragalna CT 15 3924 416827
Piedimonte Etneo CT 16 3963 420790
Fiumefreddo di Sicilia CT 16 9623 430413
Linguaglossa CT 18 5403 435816
Misterbianco CT 19 49410 485226
Catania CT 20 314555 799781
Calatabiano CT 20 5308 805089
Santa Maria di Licodia CT 20 7641 812730

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km NW of Acireale (52622 inhabitants)
20 Km N of Catania (314555 inhabitants)
68 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
71 Km N of Siracusa (122291 inhabitants)
90 Km NE of Ragusa (73313 inhabitants)
94 Km E of Caltanissetta (63360 inhabitants)
95 Km NE of Vittoria (63339 inhabitants)
96 Km N of Modica (54633 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 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 (http://www.haisentitoilterremoto.it/) 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
Reviewed
Rev100
ML 1.9 2021-10-12
07:31:48
37.6797 15.101 10 2021-10-12
07:39:23
Sala Sismica INGV-Roma 96465571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 07:31:48 ± 0.44
Latitude 37.6797 ± 0.0162
Longitude 15.1010 ± 0.0114
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96465571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1566
Semi-minor axis of confidence ellipse (meter) 1033
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 1570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.18526
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96465571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 07:39:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EFIU.HHZ. 2021-10-12T07:31:55.65 0.1 undecidable manual S 38 0.1394 124 0.46 91
IV.EPZF.HHZ. 2021-10-12T07:31:55.61 3.0 undecidable manual P 0
IV.EMPL.HHZ. 2021-10-12T07:31:54.28 0.1 undecidable manual S 270 0.1034 132 0.2 97
IV.EMSG.HHZ. 2021-10-12T07:31:53.41 0.1 undecidable manual P 320 0.1853 117 0.09 97
IV.EVRN.HHZ. 2021-10-12T07:31:52.28 0.1 undecidable manual S 71 0.0288 163 -0.2 98
IV.EFIU.HHZ. 2021-10-12T07:31:52.22 0.1 undecidable manual P 38 0.1394 124 -0.23 96
IV.EPIT.HHZ. 2021-10-12T07:31:52.36 0.1 undecidable manual P 345 0.1358 124 -0.02 100
IV.EMPL.HHZ. 2021-10-12T07:31:51.77 0.1 undecidable manual P 270 0.1034 132 -0.04 100
IV.EPOZ.HHZ. 2021-10-12T07:31:51.75 0.1 undecidable manual P 96 0.0692 143 0.45 92
IV.EVRN.HHZ. 2021-10-12T07:31:50.74 0.1 undecidable manual P 71 0.0288 163 -0.15 99
IV.ESAL.HHZ. 2021-10-12T07:31:50.91 0.1 undecidable manual P 19 0.08 139 -0.54 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPIT.HHE. ML:2.3 0.00208 1.44 AML other m 2021-10-12T07:31:55.78
IV.EFIU.HHN. ML:1.9 0.0007215 0.54 AML other m 2021-10-12T07:31:56.12
IV.EFIU.HHE. ML:1.9 0.000728 0.98 AML other m 2021-10-12T07:31:56.27
IV.EMPL.HHN. ML:2.1 0.001515 0.22 AML other m 2021-10-12T07:31:57.52
IV.EPIT.HHN. ML:2.3 0.00179 0.56 AML other m 2021-10-12T07:31:58.31
IV.EMPL.HHE. ML:1.9 0.0010435 0.38 AML other m 2021-10-12T07:32:00.28
IV.EMSG.HHE. ML:2 0.000662 0.52 AML other m 2021-10-12T07:32:02.01
IV.EMSG.HHN. ML:1.8 0.0004845 0.42 AML other m 2021-10-12T07:32:02.52
IV.EPZF.HHN. ML:1.6 0.000244 1.1 AML other m 2021-10-12T07:32:02.76
IV.EPZF.HHE. ML:1.6 0.000219 0.32 AML other m 2021-10-12T07:32:03.19
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