Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 12-09-2021 and time 06:50:33 (Italy) in region 3 km NE Cassino (FR)

A magnitude ML 1.1 earthquake occured in region: 3 km NE Cassino (FR), on

  • 12-09-2021 04:50:33 (UTC)
  • 12-09-2021 06:50:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5110, 13.8520 at 9 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
Cassino FR 3 36142 36142
Sant'Elia Fiumerapido FR 4 6166 42308
Cervaro FR 6 8109 50417
Villa Santa Lucia FR 7 2632 53049
Vallerotonda FR 7 1581 54630
Terelle FR 8 422 55052
Belmonte Castello FR 8 739 55791
Piedimonte San Germano FR 9 6535 62326
San Vittore del Lazio FR 9 2636 64962
Acquafondata FR 9 263 65225
Pignataro Interamna FR 10 2595 67820
Viticuso FR 10 353 68173
San Pietro Infine CE 11 944 69117
Villa Latina FR 12 1241 70358
Sant'Apollinare FR 12 1919 72277
Aquino FR 12 5370 77647
Atina FR 13 4316 81963
Conca Casale IS 13 200 82163
Castrocielo FR 13 3965 86128
San Biagio Saracinisco FR 13 349 86477
Rocca d'Evandro CE 13 3283 89760
Sant'Ambrogio sul Garigliano FR 13 966 90726
San Giorgio a Liri FR 14 3164 93890
Colle San Magno FR 14 699 94589
Picinisco FR 15 1218 95807
Roccasecca FR 16 7365 103172
Sant'Andrea del Garigliano FR 16 1505 104677
Mignano Monte Lungo CE 16 3250 107927
Casalattico FR 16 574 108501
Venafro IS 16 11280 119781
Vallemaio FR 16 937 120718
Pontecorvo FR 17 13242 133960
Castelnuovo Parano FR 17 883 134843
Gallinaro FR 17 1269 136112
Filignano IS 18 648 136760
Pozzilli IS 18 2380 139140
Casalvieri FR 18 2698 141838
Settefrati FR 18 728 142566
Coreno Ausonio FR 19 1644 144210
Ausonia FR 19 2619 146829
Esperia FR 20 3828 150657

Municipalities with at least 50000 inhabitants

An earthquake occurred to
63 Km NW of Caserta (76326 inhabitants)
67 Km NW of Aversa (53047 inhabitants)
71 Km NW of Giugliano in Campania (122974 inhabitants)
74 Km NW of Marano di Napoli (59874 inhabitants)
76 Km NW of Afragola (65057 inhabitants)
76 Km NW of Acerra (59573 inhabitants)
76 Km N of Pozzuoli (81661 inhabitants)
77 Km NW of Casoria (77642 inhabitants)
79 Km E of Latina (125985 inhabitants)
82 Km NW of Napoli (974074 inhabitants)
87 Km NW of Portici (55274 inhabitants)
88 Km NW of Ercolano (53709 inhabitants)
88 Km W of Benevento (60091 inhabitants)
91 Km NW of Torre del Greco (86275 inhabitants)
91 Km E of Velletri (53303 inhabitants)
97 Km S of Chieti (51815 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 1.1 2021-09-12
04:50:33		 41.5112 13.8523 9 2021-09-12
06:16:22		 Sala Sismica INGV-Roma 95330711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 04:50:33 ± 0.16
Latitude 41.5112 ± 0.0108
Longitude 13.8523 ± 0.0096
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95330711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1151
Semi-minor axis of confidence ellipse (meter) 764
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 201
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
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) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.03597
Epicentral distance of station farthest from the epicenter (degree) 0.39660
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:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 95330711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 06:16:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HNE. 2021-09-12T04:50:48.55 0.6 undecidable manual S 335 44.0226 50 0.24 45
IV.MIDA.HHZ. 2021-09-12T04:50:45.88 0.6 undecidable manual S 66 36.3414 50 -0.37 44
IV.RNI2.HNN. 2021-09-12T04:50:45.88 0.6 undecidable manual S 49 32.745 50 0.58 42
IV.POFI.HHZ. 2021-09-12T04:50:43.56 0.6 undecidable manual S 333 25.6521 109 0.48 44
IV.VVLD.HNE. 2021-09-12T04:50:41.77 0.3 undecidable manual P 335 44.0226 50 -0.34 66
IV.VAGA.HHE. 2021-09-12T04:50:41.16 0.3 undecidable manual P 108 33.4443 50 0.68 61
IV.RNI2.HNN. 2021-09-12T04:50:40.42 0.1 undecidable manual P 49 32.745 50 0.05 96
IV.MIDA.HHZ. 2021-09-12T04:50:40.40 0.3 undecidable manual P 66 36.3414 50 -0.52 64
IV.CERA.HHZ. 2021-09-12T04:50:40.37 0.6 undecidable manual S 55 16.7721 118 0.11 49
IV.POFI.HHZ. 2021-09-12T04:50:39.01 0.1 undecidable manual P 333 25.6521 109 -0.08 96
IV.LRP.EHZ. 2021-09-12T04:50:39.11 0.3 undecidable manual P 304 26.751 109 -0.18 71
IV.CERA.HHZ. 2021-09-12T04:50:37.25 0.1 undecidable manual P 55 16.7721 118 -0.21 95
IV.MCI.EHZ. 2021-09-12T04:50:37.34 0.6 undecidable manual S 236 3.996 156 0.28 48
IV.MCI.EHZ. 2021-09-12T04:50:35.54 0.1 undecidable manual P 236 3.996 156 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCI.EHN. ML:1.9 0.00126 0.26 AML other m 2021-09-12T04:50:39.51
IV.MCI.EHE. ML:1.9 0.0014299999999999998 1.76 AML other m 2021-09-12T04:50:39.03
IV.CERA.HHN. ML:1.5 0.000311 0.28 AML other m 2021-09-12T04:50:42.36
IV.CERA.HNN. ML:1.5 0.0002965 0.28 AML other m 2021-09-12T04:50:42.36
IV.CERA.HNE. ML:1.5 0.000306 0.28 AML other m 2021-09-12T04:50:43.03
IV.CERA.HHE. ML:1.4 0.0001995 0.76 AML other m 2021-09-12T04:50:44.57
IV.LRP.EHN. ML:0.6 0.00002155 1.3 AML other m 2021-09-12T04:50:44.94
IV.LRP.EHE. ML:0.9 0.000046649999999999996 0.22 AML other m 2021-09-12T04:50:44.58
IV.POFI.HHE. ML:0.7 0.0000313 1.28 AML other m 2021-09-12T04:50:44.88
IV.POFI.HHN. ML:0.5 0.0000216 1.58 AML other m 2021-09-12T04:50:45.98
IV.MIDA.HHE. ML:1.0 0.00003335 1.1 AML other m 2021-09-12T04:50:46.79
IV.MIDA.HHN. ML:1.2 0.00005425 0.42 AML other m 2021-09-12T04:50:49.73
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