Earthquake with magnitude of ML 1.1 on date 17-09-2021 and time 16:35:42 (Italy) in region Costa Siciliana nord orientale (Messina)

A magnitude ML 1.1 earthquake occured in region: Costa Siciliana nord orientale (Messina), on

  • 17-09-2021 14:35:42 (UTC)
  • 17-09-2021 16:35:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.33, 15.415 at 10 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 11 8584 8584
Spadafora ME 12 5021 13605
Venetico ME 13 3911 17516
Saponara ME 15 3988 21504
Valdina ME 16 1355 22859
Torregrotta ME 16 7431 30290
Roccavaldina ME 17 1133 31423
Rometta ME 17 6650 38073
CondrĂ² ME 19 493 38566
Pace del Mela ME 19 6239 44805
Milazzo ME 19 31646 76451
Monforte San Giorgio ME 19 2777 79228
Messina ME 19 238439 317667
San Pier Niceto ME 20 2837 320504

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Messina (238439 inhabitants)
32 Km NW of Reggio di Calabria (183035 inhabitants)
83 Km N of Acireale (52622 inhabitants)
96 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 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 1.1 2021-09-17
14:35:42
38.3302 15.4153 10 2021-09-17
14:43:26
Sala Sismica INGV-Roma 95549071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-17 14:35:42 ± 0.14
Latitude 38.3302 ± 0.0180
Longitude 15.4153 ± 0.0080
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95549071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1982
Semi-minor axis of confidence ellipse (meter) 675
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 174
Circular confidence region, given by single value of horizontal uncertainty (meter) 1980
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.09803
Epicentral distance of station farthest from the epicenter (degree) 0.46045
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95549071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-17 14:43:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.JOPP.HHZ. 2021-09-17T14:35:58.29 0.3 undecidable manual S 53 0.4605 50 -0.53 64
IV.IVUG.HHE. 2021-09-17T14:35:54.99 0.6 undecidable manual S 281 0.3426 50 -0.35 46
IV.JOPP.HHZ. 2021-09-17T14:35:52.29 0.3 undecidable manual P 53 0.4605 50 0.35 67
IV.IVUG.HHE. 2021-09-17T14:35:50.33 0.1 undecidable manual P 281 0.3426 50 0.4 90
IV.MPNC.HHZ. 2021-09-17T14:35:50.56 0.6 undecidable manual S 195 0.1898 116 -0.12 49
IV.MILZ.HHZ. 2021-09-17T14:35:49.18 0.3 undecidable manual S 248 0.1556 121 -0.34 71
IV.MPNC.HHZ. 2021-09-17T14:35:47.28 0.3 negative manual P 195 0.1898 116 0.05 75
IV.MSRU.HHZ. 2021-09-17T14:35:47.65 0.3 undecidable manual S 132 0.098 133 -0.09 76
IV.MILZ.HHZ. 2021-09-17T14:35:46.67 0.1 undecidable manual P 248 0.1556 121 0.1 99
IV.MSRU.HHZ. 2021-09-17T14:35:45.67 0.1 positive manual P 132 0.098 133 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSRU.HHN. ML:0.9 9.182231E-5 0.1216 AML other m 2021-09-17T14:35:47.65
IV.MSRU.HHE. ML:1 0.0001207858 0.1344 AML other m 2021-09-17T14:35:47.84
IV.MILZ.HHE. ML:1.9 0.0007304245 0.3008 AML other m 2021-09-17T14:35:49.41
IV.MILZ.HHN. ML:1.5 0.000274 0.24 AML other m 2021-09-17T14:35:49.50
IV.JOPP.HHE. ML:0.8 1.3075E-5 0.1 AML other m 2021-09-17T14:35:52.25
IV.JOPP.HHN. ML:0.8 1.6915E-5 0.6 AML other m 2021-09-17T14:35:58.66
IV.MPNC.HHE. ML:1.1 7.979819E-5 0.1984 AML other m 2021-09-17T14:35:51.63
IV.MPNC.HHN. ML:0.9 5.9573895E-5 0.3776 AML other m 2021-09-17T14:35:56.67
IV.JOPP.HNE. ML:1.4 6.566617E-5 1.0048 AML other m 2021-09-17T14:36:03.12
IV.JOPP.HNN. ML:1.1 3.5825315E-5 0.7552 AML other m 2021-09-17T14:35:53.51
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