Earthquake with magnitude of ML 1.5 on date 23-10-2021 and time 02:08:03 (Italy) in region 4 km E Floresta (ME)

A magnitude ML 1.5 earthquake occured in region: 4 km E Floresta (ME), on

  • 23-10-2021 00:08:03 (UTC)
  • 23-10-2021 02:08:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.985, 14.955 at 34 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
Floresta ME 4 485 485
Montalbano Elicona ME 7 2287 2772
San Piero Patti ME 8 2915 5687
Roccella Valdemone ME 8 666 6353
Santa Domenica Vittoria ME 8 980 7333
Raccuja ME 9 1041 8374
Ucria ME 9 1058 9432
Malvagna ME 11 733 10165
Randazzo CT 12 10900 21065
Tortorici ME 13 6435 27500
Librizzi ME 13 1660 29160
Moio Alcantara ME 13 717 29877
Basicò ME 13 612 30489
Sinagra ME 14 2705 33194
Tripi ME 15 873 34067
Sant'Angelo di Brolo ME 16 3090 37157
Novara di Sicilia ME 16 1337 38494
Montagnareale ME 17 1615 40109
Galati Mamertino ME 17 2627 42736
Castell'Umberto ME 17 3128 45864
Patti ME 17 13431 59295
Ficarra ME 18 1469 60764
Oliveri ME 18 2181 62945
San Salvatore di Fitalia ME 18 1319 64264
Longi ME 18 1473 65737
Francavilla di Sicilia ME 18 3945 69682
Castiglione di Sicilia CT 19 3215 72897
Maniace CT 19 3765 76662
Falcone ME 19 2808 79470
Maletto CT 19 3920 83390
Fondachelli-Fantina ME 19 1019 84409
MazzarrĂ  Sant'Andrea ME 20 1531 85940

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of Acireale (52622 inhabitants)
55 Km N of Catania (314555 inhabitants)
58 Km W of Messina (238439 inhabitants)
62 Km W of Reggio di Calabria (183035 inhabitants)
96 Km NE 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 2021-10-23
00:08:03
37.9847 14.9547 34 2021-10-23
00:15:32
Sala Sismica INGV-Roma 96892931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-23 00:08:03 ± 0.39
Latitude 37.9847 ± 0.0180
Longitude 14.9547 ± 0.0171
Depth (km) 34 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96892931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1605
Semi-minor axis of confidence ellipse (meter) 1399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 5
Circular confidence region, given by single value of horizontal uncertainty (meter) 1600
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
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) 0.63942
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 96892931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-23 00:15:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCPD.HHZ. 2021-10-23T00:08:16.47 0.6 undecidable manual S 308 0.2221 141 0.34 47
IV.AIO.HHE. 2021-10-23T00:08:16.31 0.6 undecidable manual S 93 0.2194 141 0.23 48
IV.HLNI.HHZ. 2021-10-23T00:08:15.76 0.6 undecidable manual P 186 0.6394 111 -1.17 31
IV.EPZF.HHZ. 2021-10-23T00:08:15.75 0.6 undecidable manual S 206 0.1781 147 0.39 47
IV.NOV.HHE. 2021-10-23T00:08:14.90 0.6 undecidable manual S 73 0.1493 152 -0.03 50
IV.MUCR.HHZ. 2021-10-23T00:08:13.47 0.6 undecidable manual S 313 0.0863 163 -0.73 42
IV.GALF.HHZ. 2021-10-23T00:08:13.75 0.6 undecidable manual P 228 0.411 122 0.33 45
IV.AIO.HHE. 2021-10-23T00:08:11.16 0.1 undecidable manual P 93 0.2194 141 0.21 96
IV.ESCV.HHZ. 2021-10-23T00:08:11.63 0.6 negative manual P 205 0.2617 136 0.21 48
IV.MCPD.HHZ. 2021-10-23T00:08:10.99 1.0 negative manual P 308 0.2221 141 0.02 25
IV.EPZF.HHZ. 2021-10-23T00:08:10.36 0.3 negative manual P 206 0.1781 147 -0.17 73
IV.EMSG.HHZ. 2021-10-23T00:08:10.39 3.0 negative manual P -0.05 0
IV.NOV.HHE. 2021-10-23T00:08:10.33 0.3 undecidable manual P 73 0.1493 152 0.05 76
IV.MUCR.HHZ. 2021-10-23T00:08:09.72 0.1 positive manual P 313 0.0863 163 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHE. ML:2.5 0.001122 1.44 AML other m 2021-10-23T00:08:14.22
IV.MUCR.HHN. ML:1.8 0.000298 0.4 AML other m 2021-10-23T00:08:14.93
IV.MUCR.HHE. ML:1.3 8.952779E-5 0.3 AML other m 2021-10-23T00:08:15.03
IV.EPZF.HHN. ML:2.1 0.0005105 1.52 AML other m 2021-10-23T00:08:16.11
IV.EPZF.HHE. ML:2.1 0.0004665 1.64 AML other m 2021-10-23T00:08:16.13
IV.MCPD.HHN. ML:1.2 5.063906E-5 0.32 AML other m 2021-10-23T00:08:17.22
IV.MCPD.HHE. ML:1.3 6.35E-5 0.4 AML other m 2021-10-23T00:08:17.36
IV.EMSG.HHN. ML:2.4 0.001028 0.64 AML other m 2021-10-23T00:08:20.68
IV.ESCV.HHN. ML:2 0.00032749295 0.76 AML other m 2021-10-23T00:08:25.19
IV.GALF.HHE. ML:1.6 9.9868725E-5 0.92 AML other m 2021-10-23T00:08:24.93
IV.GALF.HHN. ML:1.6 9.284554E-5 0.7 AML other m 2021-10-23T00:08:23.88
IV.GALF.HNE. ML:1.8 0.00014148595 0.91 AML other m 2021-10-23T00:08:30.35
IV.GALF.HNN. ML:1.7 0.000117419165 0.89 AML other m 2021-10-23T00:08:29.44
IV.HLNI.HHE. ML:1.4 3.521321E-5 1.02 AML other m 2021-10-23T00:08:39.26
IV.HLNI.HHN. ML:1.2 2.6626965E-5 0.24 AML other m 2021-10-23T00:08:27.33
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