Earthquake with magnitude of ML 1.5 on date 20-07-2021 and time 16:47:11 (Italy) in region Costa Catanese (Catania)

A magnitude ML 1.5 earthquake occured in region: Costa Catanese (Catania), on

  • 20-07-2021 14:47:11 (UTC)
  • 20-07-2021 16:47:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.477, 15.186 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
Catania CT 9 314555 314555
Aci Castello CT 10 18723 333278
San Gregorio di Catania CT 12 11966 345244
Valverde CT 13 7840 353084
Sant'Agata li Battiati CT 13 9479 362563
San Giovanni la Punta CT 14 23060 385623
Gravina di Catania CT 14 25838 411461
Aci Catena CT 15 29851 441312
Tremestieri Etneo CT 15 20589 461901
Aci Bonaccorsi CT 15 3524 465425
Acireale CT 15 52622 518047
Aci Sant'Antonio CT 15 17984 536031
Mascalucia CT 16 31958 567989
Misterbianco CT 17 49410 617399
Viagrande CT 17 8563 625962
San Pietro Clarenza CT 18 7743 633705
Trecastagni CT 18 10910 644615
Camporotondo Etneo CT 19 5023 649638
Pedara CT 19 14102 663740
Motta Sant'Anastasia CT 20 12116 675856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Catania (314555 inhabitants)
15 Km S of Acireale (52622 inhabitants)
47 Km N of Siracusa (122291 inhabitants)
73 Km NE of Ragusa (73313 inhabitants)
78 Km NE of Modica (54633 inhabitants)
81 Km SW of Reggio di Calabria (183035 inhabitants)
82 Km NE of Vittoria (63339 inhabitants)
86 Km SW of Messina (238439 inhabitants)
95 Km NE of Gela (75827 inhabitants)
99 Km E 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 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 1.5 2021-07-20
14:47:11
37.4772 15.1862 10 2021-07-20
14:58:25
Sala Sismica INGV-Roma 92991071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-20 14:47:11 ± 0.19
Latitude 37.4772 ± 0.0072
Longitude 15.1862 ± 0.0147
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92991071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1345
Semi-minor axis of confidence ellipse (meter) 382
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 1340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.60884
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 92991071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-20 14:58:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2021-07-20T14:47:32.28 0.6 undecidable manual S 212 0.6088 50 0 46
IV.HAVL.HHZ. 2021-07-20T14:47:29.55 0.6 undecidable manual S 186 0.5198 50 -0.08 47
IV.HVZN.HHE. 2021-07-20T14:47:29.08 0.3 undecidable manual S 232 0.4784 50 0.66 68
IV.SSY.HHZ. 2021-07-20T14:47:24.27 0.6 undecidable manual S 196 0.3318 50 0.21 47
IV.HMDC.HHZ. 2021-07-20T14:47:23.28 0.6 negative manual P 212 0.6088 50 -0.19 47
IV.ESLN.HHZ. 2021-07-20T14:47:22.70 3.0 undecidable manual S 0
IV.ECZM.HHZ. 2021-07-20T14:47:22.91 3.0 undecidable manual P 0
IV.HLNI.HHZ. 2021-07-20T14:47:22.43 0.6 undecidable manual S 243 0.2806 50 -0.12 48
IV.HVZN.HHE. 2021-07-20T14:47:21.07 0.1 undecidable manual P 232 0.4784 50 -0.16 97
IV.ESML.HHZ. 2021-07-20T14:47:21.71 3.0 undecidable manual S 0
IV.HAVL.HHZ. 2021-07-20T14:47:21.60 0.1 undecidable manual P 186 0.5198 50 -0.34 94
IV.ESPC.HHZ. 2021-07-20T14:47:21.76 3.0 undecidable manual S 0
IV.EMPL.HHZ. 2021-07-20T14:47:21.63 3.0 undecidable manual P 0
IV.HAGA.HHZ. 2021-07-20T14:47:20.31 0.3 undecidable manual S 187 0.1934 114 0.73 39
IV.SSY.HHZ. 2021-07-20T14:47:19.15 0.1 undecidable manual P 196 0.3318 50 0.43 83
IV.ECHR.HHE. 2021-07-20T14:47:18.59 0.1 undecidable manual P 314 0.3004 50 0.4 84
IV.HLNI.HHZ. 2021-07-20T14:47:17.51 0.1 undecidable manual P 243 0.2806 50 -0.33 100
IV.HAGA.HHZ. 2021-07-20T14:47:16.22 0.1 undecidable manual P 187 0.1934 114 0.09 83
IV.EPOZ.HHE. 2021-07-20T14:47:16.16 0.1 undecidable manual P 1 0.1943 114 0.01 89
IV.ESPC.HHZ. 2021-07-20T14:47:13.84 3.0 undecidable manual P 0
IV.ESML.HHZ. 2021-07-20T14:47:12.83 3.0 undecidable manual P 0
IV.ESLN.HHZ. 2021-07-20T14:47:11.40 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAGA.HHE. ML:1.1 8.235E-5 0.34 AML other m 2021-07-20T14:47:20.68
IV.HAGA.HHN. ML:0.9 6.06E-5 0.52 AML other m 2021-07-20T14:47:22.49
IV.HLNI.HHE. ML:1.2 7.715E-5 0.44 AML other m 2021-07-20T14:47:22.77
IV.HLNI.HHN. ML:1.2 7.54E-5 0.68 AML other m 2021-07-20T14:47:23.33
IV.SSY.HHE. ML:1.8 0.000236 0.74 AML other m 2021-07-20T14:47:24.36
IV.SSY.HHN. ML:2.2 0.0006615 0.14 AML other m 2021-07-20T14:47:25.25
IV.HAVL.HHN. ML:1.6 9.69E-5 0.42 AML other m 2021-07-20T14:47:30.59
IV.HAVL.HHE. ML:1.6 8.805E-5 0.7 AML other m 2021-07-20T14:47:31.54
IV.HMDC.HHN. ML:1.9 0.000139 0.86 AML other m 2021-07-20T14:47:33.51
IV.HMDC.HHE. ML:1.7 9.02E-5 1.58 AML other m 2021-07-20T14:47:33.88
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