Earthquake with magnitude of ML 1.8 on date 11-08-2021 and time 21:21:57 (Italy) in region 10 km W Milo (CT)

A magnitude ML 1.8 earthquake occured in region: 10 km W Milo (CT), on

  • 11-08-2021 19:21:57 (UTC)
  • 11-08-2021 21:21:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.747, 15.001 at 0 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
Milo CT 11 1087 1087
Zafferana Etnea CT 11 9517 10604
Sant'Alfio CT 13 1582 12186
Santa Venerina CT 14 8592 20778
Ragalna CT 14 3924 24702
Nicolosi CT 15 7463 32165
Maletto CT 15 3920 36085
Pedara CT 15 14102 50187
Randazzo CT 15 10900 61087
Bronte CT 15 19172 80259
Trecastagni CT 16 10910 91169
Giarre CT 16 27659 118828
Biancavilla CT 16 24007 142835
Linguaglossa CT 17 5403 148238
Piedimonte Etneo CT 17 3963 152201
Mascali CT 17 14282 166483
Viagrande CT 17 8563 175046
Belpasso CT 17 28108 203154
Santa Maria di Licodia CT 18 7641 210795
Adrano CT 18 36122 246917
Moio Alcantara ME 18 717 247634
Riposto CT 18 14838 262472
Castiglione di Sicilia CT 19 3215 265687
Aci Bonaccorsi CT 19 3524 269211
Fiumefreddo di Sicilia CT 19 9623 278834
Aci Sant'Antonio CT 19 17984 296818
Santa Domenica Vittoria ME 19 980 297798
San Pietro Clarenza CT 19 7743 305541
Malvagna ME 20 733 306274
Mascalucia CT 20 31958 338232
Camporotondo Etneo CT 20 5023 343255
Tremestieri Etneo CT 20 20589 363844

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
81 Km NW of Siracusa (122291 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 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 1.8 2021-08-11
19:21:57
37.747 15.001 0 2021-08-11
19:37:36
Sala Operativa INGV_OE (Catania) 93978251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-11 19:21:57
Latitude 37.7470
Longitude 15.0010
Depth (km) 0 (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 93978251

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) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
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) 0.32
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:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 93978251
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-08-11 19:37:36
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