Earthquake with magnitude of ML 1.1 on date 25-07-2021 and time 15:17:06 (Italy) in region 6 km W Zafferana Etnea (CT)

A magnitude ML 1.1 earthquake occured in region: 6 km W Zafferana Etnea (CT), on

  • 25-07-2021 13:17:06 (UTC)
  • 25-07-2021 15:17:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.682, 15.043 at 5 km depth.

The earthquake was located by: Sala Operativa INGV_OE (Catania).

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 6 9517 9517
Pedara CT 7 14102 23619
Nicolosi CT 8 7463 31082
Trecastagni CT 8 10910 41992
Milo CT 8 1087 43079
Santa Venerina CT 9 8592 51671
Viagrande CT 9 8563 60234
Ragalna CT 11 3924 64158
Aci Bonaccorsi CT 11 3524 67682
Aci Sant'Antonio CT 11 17984 85666
Sant'Alfio CT 11 1582 87248
Belpasso CT 12 28108 115356
Tremestieri Etneo CT 12 20589 135945
Mascalucia CT 12 31958 167903
San Pietro Clarenza CT 12 7743 175646
Aci Catena CT 12 29851 205497
San Giovanni la Punta CT 12 23060 228557
Camporotondo Etneo CT 13 5023 233580
Acireale CT 13 52622 286202
Gravina di Catania CT 14 25838 312040
Valverde CT 14 7840 319880
Giarre CT 14 27659 347539
Sant'Agata li Battiati CT 14 9479 357018
San Gregorio di Catania CT 14 11966 368984
Riposto CT 15 14838 383822
Santa Maria di Licodia CT 15 7641 391463
Biancavilla CT 16 24007 415470
Mascali CT 16 14282 429752
Aci Castello CT 17 18723 448475
PaternĂ² CT 17 48228 496703
Misterbianco CT 18 49410 546113
Piedimonte Etneo CT 19 3963 550076
Adrano CT 19 36122 586198
Fiumefreddo di Sicilia CT 19 9623 595821
Motta Sant'Anastasia CT 20 12116 607937
Linguaglossa CT 20 5403 613340

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Acireale (52622 inhabitants)
20 Km N of Catania (314555 inhabitants)
71 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km N of Siracusa (122291 inhabitants)
73 Km SW of Messina (238439 inhabitants)
88 Km N of Ragusa (73313 inhabitants)
89 Km E of Caltanissetta (63360 inhabitants)
93 Km NE of Vittoria (63339 inhabitants)
95 Km N of Modica (54633 inhabitants)
98 Km NE of Gela (75827 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
Rev200
ML 1.1 2021-07-25
13:17:06
37.682 15.043 5 2021-07-25
13:31:35
Sala Operativa INGV_OE (Catania) 93198431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-25 13:17:06
Latitude 37.6820
Longitude 15.0430
Depth (km) 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT#SeismPicker_SO-OE
Event type earthquake
Origin ID 93198431

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 93198431
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-07-25 13:31:35
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