Earthquake with magnitude of ML 1.7 on date 17-10-2021 and time 23:39:18 (UTC) in region Costa Siciliana nord orientale (Messina)

A magnitude ML 1.7 earthquake occured in region: Costa Siciliana nord orientale (Messina), on

  • 17-10-2021 23:39:18 (UTC)
  • 18-10-2021 01:39:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.35, 15.387 at 110 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
Villafranca Tirrena ME 13 8584 8584
Spadafora ME 14 5021 13605
Venetico ME 15 3911 17516
Valdina ME 17 1355 18871
Saponara ME 18 3988 22859
Torregrotta ME 18 7431 30290
Roccavaldina ME 19 1133 31423
Milazzo ME 19 31646 63069
Rometta ME 20 6650 69719
CondrĂ² ME 20 493 70212
Pace del Mela ME 20 6239 76451

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Messina (238439 inhabitants)
35 Km NW of Reggio di Calabria (183035 inhabitants)
84 Km N of Acireale (52622 inhabitants)
98 Km N of Catania (314555 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.7 2021-10-17
23:39:18
38.3502 15.3873 110 2021-10-17
23:52:57
Sala Sismica INGV-Roma 96704351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 23:39:18 ± 0.31
Latitude 38.3502 ± 0.0297
Longitude 15.3873 ± 0.0161
Depth (km) 110 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96704351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3332
Semi-minor axis of confidence ellipse (meter) 677
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 344
Circular confidence region, given by single value of horizontal uncertainty (meter) 3330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 0.82917
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 96704351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 23:52:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PLAC.HHZ. 2021-10-17T23:39:53.47 0.3 undecidable manual S 83 0.8292 136 0.58 58
IV.JOPP.HHZ. 2021-10-17T23:39:47.27 0.6 undecidable manual S 56 0.4667 152 -0.52 44
IV.IVPL.HHE. 2021-10-17T23:39:46.58 0.3 undecidable manual S 275 0.3202 160 0.19 73
IV.IVUG.HHE. 2021-10-17T23:39:46.49 0.3 undecidable manual S 278 0.3175 161 0.12 74
IV.MPNC.HHZ. 2021-10-17T23:39:45.29 0.3 undecidable manual S 188 0.205 167 -0.33 72
IV.PLAC.HHZ. 2021-10-17T23:39:38.27 0.1 undecidable manual P 83 0.8292 136 -0.1 89
IV.SOI.EHE. 2021-10-17T23:39:36.14 0.1 undecidable manual P 118 0.5927 146 -0.18 92
IV.JOPP.HHZ. 2021-10-17T23:39:35.15 0.1 undecidable manual P 56 0.4667 152 -0.29 92
IV.MUCR.HHZ. 2021-10-17T23:39:35.82 0.1 undecidable manual P 233 0.5063 150 0.12 95
IV.MTTG.HHZ. 2021-10-17T23:39:35.37 0.1 undecidable manual P 145 0.4245 155 0.19 94
IV.MPNC.HHZ. 2021-10-17T23:39:34.70 0.6 undecidable manual P 188 0.205 167 0.52 46
IV.IVPL.HHE. 2021-10-17T23:39:34.62 0.1 undecidable manual P 275 0.3202 160 -0.01 100
IV.IVUG.HHE. 2021-10-17T23:39:34.72 0.1 undecidable manual P 278 0.3175 161 0.1 99
IV.MILZ.HHE. 2021-10-17T23:39:33.81 0.1 undecidable manual P 237 0.1457 171 -0.21 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLAC.HHE. ML:1.6 2.655E-5 0.12 AML other m 2021-10-17T23:39:38.36
IV.MPNC.HHE. ML:1.7 4.56E-5 0.52 AML other m 2021-10-17T23:39:48.65
IV.JOPP.HHN. ML:1.6 3.2E-5 1.28 AML other m 2021-10-17T23:39:49.32
IV.JOPP.HHE. ML:1.4 1.95E-5 0.44 AML other m 2021-10-17T23:39:50.08
IV.MTTG.HHE. ML:1.7 3.34E-5 0.5 AML other m 2021-10-17T23:39:50.37
IV.MPNC.HHN. ML:1.8 4.82E-5 1.46 AML other m 2021-10-17T23:39:52.95
IV.MTTG.HHN. ML:1.8 4.75E-5 0.38 AML other m 2021-10-17T23:39:52.34
IV.PLAC.HHN. ML:1.6 2.575E-5 0.34 AML other m 2021-10-17T23:39:54.57
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