Earthquake with magnitude of ML 1.5 on date 18-01-2021 and time 16:56:17 (Italy) in region 8 km W Milo (CT)

A magnitude ML 1.5 earthquake occured in region: 8 km W Milo (CT), on

  • 18-01-2021 15:56:17 (UTC)
  • 18-01-2021 16:56:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7390, 15.0230 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 8 1087 1087
Zafferana Etnea CT 9 9517 10604
Sant'Alfio CT 11 1582 12186
Santa Venerina CT 12 8592 20778
Nicolosi CT 14 7463 28241
Pedara CT 14 14102 42343
Ragalna CT 14 3924 46267
Giarre CT 14 27659 73926
Trecastagni CT 14 10910 84836
Mascali CT 15 14282 99118
Viagrande CT 16 8563 107681
Linguaglossa CT 16 5403 113084
Piedimonte Etneo CT 16 3963 117047
Riposto CT 16 14838 131885
Belpasso CT 17 28108 159993
Randazzo CT 17 10900 170893
Maletto CT 17 3920 174813
Biancavilla CT 17 24007 198820
Aci Bonaccorsi CT 17 3524 202344
Aci Sant'Antonio CT 17 17984 220328
Bronte CT 18 19172 239500
Fiumefreddo di Sicilia CT 18 9623 249123
Santa Maria di Licodia CT 18 7641 256764
Moio Alcantara ME 18 717 257481
Castiglione di Sicilia CT 18 3215 260696
San Pietro Clarenza CT 18 7743 268439
Aci Catena CT 18 29851 298290
Tremestieri Etneo CT 19 20589 318879
Mascalucia CT 19 31958 350837
Adrano CT 19 36122 386959
Acireale CT 19 52622 439581
Camporotondo Etneo CT 19 5023 444604
San Giovanni la Punta CT 19 23060 467664
Valverde CT 20 7840 475504
Gravina di Catania CT 20 25838 501342

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Acireale (52622 inhabitants)
27 Km N of Catania (314555 inhabitants)
68 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
89 Km E of Caltanissetta (63360 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 inhabitants)
100 Km N of Modica (54633 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.5 2021-01-18
15:56:17
37.7392 15.0228 8 2021-07-12
16:55:00
Bollettino Sismico Italiano INGV 87629221
Reviewed
Rev100
ML 1.5 2021-01-18
15:56:17
37.7383 15.0038 8 2021-01-18
16:13:28
Sala Sismica INGV-Roma 86354911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 15:56:17 ± 0.15
Latitude 37.7392 ± 0.0045
Longitude 15.0228 ± 0.0057
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87629221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 514
Semi-minor axis of confidence ellipse (meter) 267
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.32555
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 86354911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 16:13:28

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 87629221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-02 15:48:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.AIO.HHZ. 2021-01-18T15:56:29.28 0.3 undecidable manual S 36 0.2851 104 0.3 68
IV.MUCR.HHE. 2021-01-18T15:56:25.00 1.0 undecidable manual P 339 0.3256 50 -0.06 24
IV.AIO.HHZ. 2021-01-18T15:56:24.16 0.1 undecidable manual P 36 0.2851 104 -0.04 96
IV.EFIU.HHE. 2021-01-18T15:56:24.64 0.6 undecidable manual S 71 0.1565 114 0.36 46
IV.ECTS.HHZ. 2021-01-18T15:56:23.92 0.3 undecidable manual S 28 0.1628 114 -0.57 65
IV.EMSG.HHZ. 2021-01-18T15:56:22.90 0.6 undecidable manual S 325 0.0998 125 0.51 45
IV.ECBD.HHE. 2021-01-18T15:56:21.57 0.3 undecidable manual S 51 0.0648 138 0.2 73
IV.ECTS.HHZ. 2021-01-18T15:56:21.38 0.1 undecidable manual P 28 0.1628 114 -0.23 94
IV.EFIU.HHE. 2021-01-18T15:56:21.75 0.1 undecidable manual P 71 0.1565 114 0.27 94
IV.EMCN.HHZ. 2021-01-18T15:56:21.10 0.3 undecidable manual S 9 0.0531 143 0.03 75
IV.EPZF.HHZ. 2021-01-18T15:56:21.84 1.0 undecidable manual P 303 0.1565 114 0.36 23
IV.ESPC.HHE. 2021-01-18T15:56:20.95 0.3 undecidable manual S 176 0.0468 147 0.01 76
IV.EMFO.HHE. 2021-01-18T15:56:20.93 0.3 undecidable manual S 94 0.0531 143 -0.15 73
IV.EMSG.HHZ. 2021-01-18T15:56:20.32 0.1 undecidable manual P 325 0.0998 125 -0.07 99
IV.ESAL.HHE. 2021-01-18T15:56:20.45 0.1 undecidable manual P 80 0.0899 128 0.24 95
IV.EPIT.HHE. 2021-01-18T15:56:19.95 0.1 undecidable manual P 20 0.0764 133 -0.04 100
IV.EMFS.HHE. 2021-01-18T15:56:19.45 1.0 undecidable manual P 225 0.0279 159 0.09 25
IV.EMCN.HHZ. 2021-01-18T15:56:19.51 0.1 undecidable manual P 9 0.0531 143 -0.12 99
IV.ESPC.HHE. 2021-01-18T15:56:19.50 0.1 undecidable manual P 176 0.0468 147 -0.06 100
IV.ESLN.HHZ. 2021-01-18T15:56:19.86 1.0 undecidable manual P 220 0.0594 140 0.13 25
IV.ECBD.HHE. 2021-01-18T15:56:19.63 0.1 undecidable manual P 51 0.0648 138 -0.17 97
IV.EMFO.HHE. 2021-01-18T15:56:19.41 0.1 undecidable manual P 94 0.0531 143 -0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAGR.HHE. ML:1.9 0.00021462144999999998 0.4768 AML other m 2021-01-18T15:56:19.02
IV.CAGR.HHN. ML:1.7 0.0001546913 0.5024 AML other m 2021-01-18T15:56:21.33
IV.EMSG.HHE. ML:2.0 0.0012726165 0.4992 AML other m 2021-01-18T15:56:21.11
IV.ECTS.HHN. ML:1.3 0.00017715665 0.3072 AML other m 2021-01-18T15:56:25.68
IV.ECTS.HHE. ML:1.3 0.0001536427 0.1792 AML other m 2021-01-18T15:56:25.68
IV.EMCN.HNE. ML:2.1 0.0022827340000000002 0.32 AML other m 2021-01-18T15:56:23.92
IV.EMCN.HHE. ML:2.1 0.0021578405 0.32 AML other m 2021-01-18T15:56:23.92
IV.AIO.HHE. ML:1.1 0.000058928685 0.2944 AML other m 2021-01-18T15:56:31.49
IV.EMCN.HHN. ML:2.0 0.001758786 0.2304 AML other m 2021-01-18T15:56:21.84
IV.EMCN.HNN. ML:2.0 0.0017997885 0.2304 AML other m 2021-01-18T15:56:21.84
IV.EMSG.HHN. ML:1.8 0.00091257095 0.6144 AML other m 2021-01-18T15:56:24.47
IV.AIO.HHN. ML:1.2 0.00007338857 1.8176 AML other m 2021-01-18T15:56:29.64
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download