Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 24-07-2021 and time 00:11:02 (Italy) in region 6 km S Troina (EN)

A magnitude ML 1.9 earthquake occured in region: 6 km S Troina (EN), on

  • 23-07-2021 22:11:02 (UTC)
  • 24-07-2021 00:11:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7320, 14.6200 at 24 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Troina EN 6 9373 9373
Gagliano Castelferrato EN 8 3593 12966
Regalbuto EN 9 7277 20243
Agira EN 12 8345 28588
Cerami EN 13 2006 30594
San Teodoro ME 15 1403 31997
Cesarò ME 15 2439 34436
Centuripe EN 16 5470 39906
Nissoria EN 17 3000 42906
Capizzi ME 18 3176 46082
Catenanuova EN 19 4866 50948
Nicosia EN 20 13899 64847
Bronte CT 20 19172 84019

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NW of Catania (314555 inhabitants)
50 Km W of Acireale (52622 inhabitants)
56 Km NE of Caltanissetta (63360 inhabitants)
81 Km NE of Gela (75827 inhabitants)
87 Km N of Vittoria (63339 inhabitants)
90 Km N of Ragusa (73313 inhabitants)
95 Km NW of Siracusa (122291 inhabitants)
97 Km SW of Messina (238439 inhabitants)
98 Km N of Modica (54633 inhabitants)
99 Km W of Reggio di Calabria (183035 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
Bulletin
Rev1000 		ML 1.9 2021-07-23
22:11:02		 37.7317 14.6203 24 2021-12-29
11:12:51		 Bollettino Sismico Italiano INGV 97364781
Reviewed
Rev100 		ML 1.9 2021-07-23
22:11:03		 37.7478 14.6202 23 2021-07-23
22:27:46		 Sala Sismica INGV-Roma 93124181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-23 22:11:02 ± 0.14
Latitude 37.7317 ± 0.0054
Longitude 14.6203 ± 0.0102
Depth (km) 24 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97364781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 867
Semi-minor axis of confidence ellipse (meter) 292
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 1.07469
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 97364781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-09 15:42:12

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 93124181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-23 22:27:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HPAC.HHZ. 2021-07-23T22:11:22.75 0.3 undecidable manual P 162 119.2917 97 -0.14 64
IV.HLNI.HHZ. 2021-07-23T22:11:19.40 0.3 undecidable manual S 152 47.9187 109 0.61 66
IV.MSRU.HHZ. 2021-07-23T22:11:19.80 0.3 undecidable manual P 52 97.5246 98 0.23 66
IV.HAVL.HHZ. 2021-07-23T22:11:18.88 0.3 undecidable manual P 153 96.4257 98 -0.51 62
IV.IFIL.HHZ. 2021-07-23T22:11:18.27 1.0 undecidable manual P 358 92.4408 99 -0.52 21
IV.MCPD.HHZ. 2021-07-23T22:11:17.78 0.6 undecidable manual S 13 44.1225 111 -0.06 51
IV.HMDC.HHZ. 2021-07-23T22:11:17.71 0.3 undecidable manual P 170 86.8464 100 -0.24 67
IV.HVIT.HHZ. 2021-07-23T22:11:16.99 0.1 undecidable manual P 186 82.4508 100 -0.28 89
IV.IVPL.HHZ. 2021-07-23T22:11:16.87 0.3 undecidable manual P 24 78.1662 101 0.25 68
IV.MUCR.HHZ. 2021-07-23T22:11:16.84 0.3 undecidable manual S 33 41.0256 113 -0.23 74
IV.MSFR.HHZ. 2021-07-23T22:11:15.21 0.6 undecidable manual S 356 33.6441 118 -0.07 52
IV.HAGA.HHZ. 2021-07-23T22:11:14.76 0.3 undecidable manual P 136 68.2761 103 -0.38 68
IV.RAFF.HHZ. 2021-07-23T22:11:14.56 0.3 undecidable manual P 202 60.8946 104 0.54 67
IV.GIB.HHE. 2021-07-23T22:11:14.51 0.6 undecidable manual P 299 59.3961 105 0.7 42
IV.HCRL.HHZ. 2021-07-23T22:11:13.77 0.3 undecidable manual P 144 61.5939 104 -0.35 69
IV.EPZF.HHZ. 2021-07-23T22:11:13.63 0.6 undecidable manual S 64 23.1546 130 0.69 44
IV.HVZN.HHZ. 2021-07-23T22:11:13.99 0.3 undecidable manual P 172 61.9935 104 -0.19 71
IV.PETRA.HHE. 2021-07-23T22:11:12.26 0.3 undecidable manual P 284 45.7209 110 0.47 70
IV.CSLB.HHE. 2021-07-23T22:11:12.94 0.3 undecidable manual P 295 54.3012 106 -0.11 73
IV.PLLN.EHE. 2021-07-23T22:11:12.80 0.6 undecidable manual P 305 50.8158 108 0.26 48
IV.ESCV.HHZ. 2021-07-23T22:11:11.30 0.6 undecidable manual S 84 17.1717 139 -0.51 49
IV.MCPD.HHZ. 2021-07-23T22:11:11.29 0.1 undecidable manual P 13 44.1225 111 -0.27 97
IV.HLNI.HHZ. 2021-07-23T22:11:11.85 0.1 undecidable manual P 152 47.9187 109 -0.25 96
IV.EPIT.HHZ. 2021-07-23T22:11:11.93 0.3 undecidable manual P 77 39.2274 114 1.07 55
IV.GALF.HHZ. 2021-07-23T22:11:10.12 0.6 undecidable manual S 244 5.2947 166 -0.19 53
IV.MUCR.HHZ. 2021-07-23T22:11:10.79 0.1 undecidable manual P 33 41.0256 113 -0.33 96
IV.EMSG.HHZ. 2021-07-23T22:11:10.32 0.6 undecidable manual P 71 30.5472 121 0.66 44
IV.ESML.HHZ. 2021-07-23T22:11:09.67 0.3 undecidable manual P 119 25.9518 126 0.59 69
IV.EPZF.HHZ. 2021-07-23T22:11:09.01 0.1 undecidable manual P 64 23.1546 130 0.28 100
IV.MSFR.HHZ. 2021-07-23T22:11:09.64 0.3 undecidable manual P 356 33.6441 118 -0.44 71
IV.CAGR.HHZ. 2021-07-23T22:11:08.66 0.1 undecidable manual P 221 16.0728 141 0.69 90
IV.ESCV.HHZ. 2021-07-23T22:11:07.69 0.1 negative manual P 84 17.1717 139 -0.39 99
IV.GALF.HHZ. 2021-07-23T22:11:06.64 0.1 negative manual P 244 5.2947 166 -0.57 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HNN. ML:1.3 0.0001398153 0.2944 AML other m 2021-07-23T22:11:11.92
IV.GALF.HNE. ML:1.3 0.00013802278499999997 0.448 AML other m 2021-07-23T22:11:12.38
IV.GALF.HHE. ML:2.2 0.00099657635 0.1792 AML other m 2021-07-23T22:11:12.38
IV.GALF.HHN. ML:2.2 0.001223088 0.2944 AML other m 2021-07-23T22:11:12.47
IV.ESCV.HHE. ML:2.1 0.000664 1.54 AML other m 2021-07-23T22:11:14.16
IV.CAGR.HHN. ML:1.9 0.0004285 1.14 AML other m 2021-07-23T22:11:15.21
IV.MSFR.HHE. ML:1.2 0.00004894665 0.256 AML other m 2021-07-23T22:11:15.67
IV.CAGR.HHE. ML:2.0 0.0005215 1.4 AML other m 2021-07-23T22:11:15.80
IV.MSFR.HHN. ML:1.2 0.00005206215 0.2688 AML other m 2021-07-23T22:11:16.24
IV.ESML.HNN. ML:1.2 0.00007739323 0.1792 AML other m 2021-07-23T22:11:16.51
IV.ESML.HHE. ML:1.4 0.000098550495 0.1792 AML other m 2021-07-23T22:11:17.25
IV.MUCR.HHN. ML:1.8 0.0001905 0.3 AML other m 2021-07-23T22:11:17.42
IV.MUCR.HHE. ML:1.7 0.000147584 0.256 AML other m 2021-07-23T22:11:17.61
IV.ESML.HNE. ML:1.4 0.00011137679500000001 0.1792 AML other m 2021-07-23T22:11:17.82
IV.ESML.HHN. ML:1.5 0.00012974005 1.8208 AML other m 2021-07-23T22:11:17.07
IV.MCPD.HHE. ML:2.0 0.00027049999999999996 0.36 AML other m 2021-07-23T22:11:18.91
IV.EMSG.HHE. ML:1.8 0.00026257335 0.3584 AML other m 2021-07-23T22:11:19.33
IV.ESCV.HHN. ML:2.2 0.0008674999999999999 0.2 AML other m 2021-07-23T22:11:19.79
IV.HLNI.HHE. ML:1.8 0.000144 0.82 AML other m 2021-07-23T22:11:19.80
IV.MCPD.HHN. ML:1.7 0.00014698345000000002 0.256 AML other m 2021-07-23T22:11:19.96
IV.HLNI.HHN. ML:1.7 0.000119726815 0.1024 AML other m 2021-07-23T22:11:20.18
IV.HCRL.HHE. ML:1.7 0.00010246737999999999 0.1408 AML other m 2021-07-23T22:11:23.55
IV.HAGA.HHN. ML:2.0 0.00016700000000000002 1.42 AML other m 2021-07-23T22:11:25.75
IV.HCRL.HHN. ML:1.8 0.00012392164999999999 0.1152 AML other m 2021-07-23T22:11:25.59
IV.HAGA.HHE. ML:1.9 0.00014171765 0.384 AML other m 2021-07-23T22:11:25.65
IV.RAFF.HHN. ML:1.8 0.0001245 1.72 AML other m 2021-07-23T22:11:26.96
IV.HVZN.HHN. ML:2.1 0.00023310835 0.256 AML other m 2021-07-23T22:11:27.26
IV.HVZN.HNN. ML:2.1 0.0002226256 0.3712 AML other m 2021-07-23T22:11:27.27
IV.RAFF.HHE. ML:1.8 0.0001223048 0.2816 AML other m 2021-07-23T22:11:27.79
IV.HVZN.HNE. ML:2.0 0.00017456157999999998 0.3968 AML other m 2021-07-23T22:11:28.33
IV.HVZN.HHE. ML:2.0 0.00019485084999999998 0.2944 AML other m 2021-07-23T22:11:29.04
IV.IVPL.HHE. ML:1.6 0.000061051225 0.32 AML other m 2021-07-23T22:11:29.43
IV.IVPL.HHN. ML:1.8 0.00009640599499999999 0.3072 AML other m 2021-07-23T22:11:29.52
IV.HVIT.HHN. ML:1.8 0.00007681019999999999 0.2816 AML other m 2021-07-23T22:11:31.81
IV.HVIT.HHE. ML:2.0 0.000135 0.28 AML other m 2021-07-23T22:11:32.05
IV.HMDC.HNE. ML:2.0 0.00011087667500000001 0.1536 AML other m 2021-07-23T22:11:32.55
IV.HMDC.HHE. ML:2.0 0.00011949999999999999 0.2 AML other m 2021-07-23T22:11:33.73
IV.MSRU.HHE. ML:1.9 0.00008185000000000001 0.42 AML other m 2021-07-23T22:11:34.59
IV.HAVL.HHN. ML:2.1 0.00012875767999999998 0.1152 AML other m 2021-07-23T22:11:34.91
IV.HMDC.HHN. ML:2.0 0.000102975045 0.2432 AML other m 2021-07-23T22:11:35.26
IV.HAVL.HHE. ML:2.0 0.000109520065 0.1664 AML other m 2021-07-23T22:11:36.97
IV.MSRU.HHN. ML:1.8 0.00006515 0.44 AML other m 2021-07-23T22:11:37.43
IV.HPAC.HHN. ML:2.2 0.00011819679999999999 1.6928 AML other m 2021-07-23T22:11:41.88
IV.HPAC.HHE. ML:2.3 0.00013697242000000002 1.8208 AML other m 2021-07-23T22:11:42.09
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