Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 28-07-2021 and time 00:15:05 (Italy) in region 9 km S San Fratello (ME)

A magnitude ML 0.9 earthquake occured in region: 9 km S San Fratello (ME), on

  • 27-07-2021 22:15:05 (UTC)
  • 28-07-2021 00:15:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9320, 14.6180 at 6 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Fratello ME 9 3707 3707
San Teodoro ME 12 1403 5110
Alcara li Fusi ME 13 1980 7090
Cesarò ME 13 2439 9529
Militello Rosmarino ME 14 1324 10853
Acquedolci ME 14 5744 16597
Capizzi ME 15 3176 19773
Sant'Agata di Militello ME 16 12624 32397
Longi ME 16 1473 33870
Troina EN 16 9373 43243
Cerami EN 17 2006 45249
San Marco d'Alunzio ME 17 1996 47245
Galati Mamertino ME 18 2627 49872
Maniace CT 18 3765 53637
Torrenova ME 19 4386 58023
Caronia ME 19 3364 61387
Frazzanò ME 19 711 62098

Municipalities with at least 50000 inhabitants

An earthquake occurred to
60 Km NW of Acireale (52622 inhabitants)
63 Km NW of Catania (314555 inhabitants)
69 Km NE of Caltanissetta (63360 inhabitants)
87 Km W of Messina (238439 inhabitants)
92 Km W of Reggio di Calabria (183035 inhabitants)
98 Km E of Bagheria (55387 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2021-07-27
22:15:05		 37.9318 14.6182 6 2021-07-27
22:29:25		 Sala Sismica INGV-Roma 93284011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-27 22:15:05 ± 0.1
Latitude 37.9318 ± 0.0045
Longitude 14.6182 ± 0.0080
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93284011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 548
Semi-minor axis of confidence ellipse (meter) 498
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.10432
Epicentral distance of station farthest from the epicenter (degree) 0.47035
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 93284011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-27 22:29:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIB.HHE. 2021-07-27T22:15:16.50 0.6 undecidable manual P 277 52.2033 50 0.51 43
IV.CSLB.HHE. 2021-07-27T22:15:15.40 0.1 undecidable manual P 271 49.0176 50 -0.11 93
IV.GALF.HHZ. 2021-07-27T22:15:14.50 0.6 undecidable manual S 190 24.9528 104 -0.32 47
IV.MUCR.HHZ. 2021-07-27T22:15:14.93 0.6 undecidable manual S 61 25.5522 104 -0.09 49
IV.EPZF.HHZ. 2021-07-27T22:15:14.88 0.3 undecidable manual S 120 24.0537 104 0.34 70
IV.MCPD.HHZ. 2021-07-27T22:15:14.20 0.6 undecidable manual S 25 23.0547 105 0.01 50
IV.EPZF.HHZ. 2021-07-27T22:15:11.13 1.0 undecidable manual P 120 24.0537 104 0.24 24
IV.ESCV.HHZ. 2021-07-27T22:15:11.67 0.6 positive manual P 140 26.8509 103 0.25 47
IV.MCPD.HHZ. 2021-07-27T22:15:10.53 0.1 positive manual P 25 23.0547 105 -0.16 97
IV.GALF.HHZ. 2021-07-27T22:15:10.61 1.0 undecidable manual P 190 24.9528 104 -0.45 23
IV.MSFR.HHZ. 2021-07-27T22:15:10.70 0.6 undecidable manual S 348 11.5773 118 0.25 48
IV.MUCR.HHZ. 2021-07-27T22:15:10.70 0.3 positive manual P 61 25.5522 104 -0.47 68
IV.MSFR.HHZ. 2021-07-27T22:15:08.63 0.1 positive manual P 348 11.5773 118 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSFR.HHE. ML:0.5 0.0000387 0.48 AML other m 2021-07-27T22:15:11.24
IV.MSFR.HHN. ML:0.6 0.00005715 1.06 AML other m 2021-07-27T22:15:11.33
IV.MCPD.HHE. ML:0.8 0.000037749999999999996 0.3 AML other m 2021-07-27T22:15:14.95
IV.MCPD.HHN. ML:0.6 0.00003175 1.04 AML other m 2021-07-27T22:15:15.61
IV.ESCV.HHE. ML:1.3 0.0001088 0.3 AML other m 2021-07-27T22:15:17.82
IV.GALF.HHE. ML:1.2 0.0001115 0.44 AML other m 2021-07-27T22:15:17.75
IV.GALF.HHN. ML:1.3 0.000135 0.88 AML other m 2021-07-27T22:15:18.37
IV.ESCV.HHN. ML:1.2 0.0000998 0.26 AML other m 2021-07-27T22:15:19.34
IV.MUCR.HHE. ML:0.9 0.00004995 0.4 AML other m 2021-07-27T22:15:19.37
IV.MUCR.HHN. ML:0.8 0.00003845 0.38 AML other m 2021-07-27T22:15:19.70
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