Earthquake with magnitude of ML 1.6 on date 23-05-2021 and time 23:18:50 (Italy) in region Costa Siciliana nord orientale (Messina)

A magnitude ML 1.6 earthquake occured in region: Costa Siciliana nord orientale (Messina), on

  • 23-05-2021 21:18:50 (UTC)
  • 23-05-2021 23:18:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.362, 14.594 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
86 Km W of Messina (238439 inhabitants)
96 Km W of Reggio di Calabria (183035 inhabitants)
97 Km NW of Acireale (52622 inhabitants)
100 Km E of Bagheria (55387 inhabitants)
Recent and historical seismicity
Seismic hazard
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 ( 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
ML 1.6 2021-05-23
38.362 14.5942 10 2021-05-23
Sala Sismica INGV-Roma 90429741
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-05-23 21:18:50 ± 0.18
Latitude 38.3620 ± 0.0126
Longitude 14.5942 ± 0.0229
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 90429741


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2306
Semi-minor axis of confidence ellipse (meter) 629
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
Circular confidence region, given by single value of horizontal uncertainty (meter) 2310
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.20235
Epicentral distance of station farthest from the epicenter (degree) 0.60884
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information


Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 90429741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-23 21:27:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-05-23T21:19:04.13 0.6 undecidable manual S 145 0.3867 50 -0.09 49
IV.EMSG.HHZ. 2021-05-23T21:19:02.68 0.6 undecidable manual P 153 0.6088 50 0.63 41
IV.MSFR.HHZ. 2021-05-23T21:19:02.66 0.3 undecidable manual S 180 0.3283 50 0.19 73
IV.MCPD.HHZ. 2021-05-23T21:19:00.70 0.6 undecidable manual S 156 0.2644 50 0.11 50
IV.IACL.HHZ. 2021-05-23T21:19:00.17 0.3 undecidable manual S 312 0.2536 50 -0.09 76
IV.IFIL.HHZ. 2021-05-23T21:18:59.18 0.6 undecidable manual S 356 0.2023 115 0.48 47
IV.MUCR.HHZ. 2021-05-23T21:18:58.21 0.1 undecidable manual P 145 0.3867 50 -0.05 100
IV.MSFR.HHZ. 2021-05-23T21:18:57.16 0.1 undecidable manual P 180 0.3283 50 -0.09 100
IV.IACL.HHZ. 2021-05-23T21:18:56.07 0.3 undecidable manual P 312 0.2536 50 0.1 76
IV.MCPD.HHZ. 2021-05-23T21:18:55.79 0.3 negative manual P 156 0.2644 50 -0.38 72
IV.IFIL.HHZ. 2021-05-23T21:18:54.82 0.1 undecidable manual P 356 0.2023 115 -0.25 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IACL.HHE. ML:1.9 0.000408 0.18 AML other m 2021-05-23T21:19:00.75
IV.IFIL.HHE. ML:2.1 0.000936 0.98 AML other m 2021-05-23T21:19:01.82
IV.IACL.HHN. ML:1.9 0.0004345 0.22 AML other m 2021-05-23T21:19:01.67
IV.IFIL.HHN. ML:1.7 0.000311 0.12 AML other m 2021-05-23T21:19:01.66
IV.MCPD.HHN. ML:1.4 0.000115 0.38 AML other m 2021-05-23T21:19:02.42
IV.MCPD.HHE. ML:1.2 7.025E-5 0.5 AML other m 2021-05-23T21:19:02.97
IV.MUCR.HHN. ML:1.6 0.00011575 0.62 AML other m 2021-05-23T21:19:06.42
IV.MUCR.HHE. ML:1.2 5.2781515E-5 0.6784 AML other m 2021-05-23T21:19:06.08
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download