Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 07-08-2021 and time 00:28:47 (Italy) in region 5 km NE Acquafondata (FR)

A magnitude ML 1.1 earthquake occured in region: 5 km NE Acquafondata (FR), on

  • 06-08-2021 22:28:47 (UTC)
  • 07-08-2021 00:28:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5800, 13.9940 at 8 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
Acquafondata FR 5 263 263
Viticuso FR 6 353 616
Filignano IS 7 648 1264
San Biagio Saracinisco FR 7 349 1613
Scapoli IS 7 680 2293
Vallerotonda FR 7 1581 3874
Rocchetta a Volturno IS 9 1113 4987
Pozzilli IS 10 2380 7367
Colli a Volturno IS 10 1349 8716
Conca Casale IS 10 200 8916
Castel San Vincenzo IS 10 516 9432
Pizzone IS 10 329 9761
Montaquila IS 10 2456 12217
Venafro IS 11 11280 23497
Sant'Elia Fiumerapido FR 12 6166 29663
Cerro al Volturno IS 12 1281 30944
Fornelli IS 13 1909 32853
Picinisco FR 13 1218 34071
Cervaro FR 13 8109 42180
Villa Latina FR 14 1241 43421
San Vittore del Lazio FR 14 2636 46057
Macchia d'Isernia IS 15 1035 47092
Belmonte Castello FR 15 739 47831
San Pietro Infine CE 15 944 48775
Settefrati FR 16 728 49503
Montenero Val Cocchiara IS 16 538 50041
Monteroduni IS 17 2264 52305
Cassino FR 17 36142 88447
Acquaviva d'Isernia IS 17 425 88872
Atina FR 17 4316 93188
Alfedena AQ 18 864 94052
Capriati a Volturno CE 18 1541 95593
Terelle FR 18 422 96015
Gallinaro FR 18 1269 97284
Scontrone AQ 19 574 97858
Sesto Campano IS 19 2388 100246
Mignano Monte Lungo CE 19 3250 103496
Rionero Sannitico IS 19 1118 104614
Isernia IS 19 21842 126456
Sant'Agapito IS 20 1496 127952
Barrea AQ 20 726 128678
Ciorlano CE 20 426 129104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
63 Km NW of Caserta (76326 inhabitants)
70 Km N of Aversa (53047 inhabitants)
75 Km N of Giugliano in Campania (122974 inhabitants)
77 Km NW of Acerra (59573 inhabitants)
78 Km N of Marano di Napoli (59874 inhabitants)
78 Km NW of Afragola (65057 inhabitants)
79 Km NW of Casoria (77642 inhabitants)
82 Km N of Pozzuoli (81661 inhabitants)
83 Km NW of Benevento (60091 inhabitants)
85 Km N of Napoli (974074 inhabitants)
87 Km S of Chieti (51815 inhabitants)
89 Km NW of Portici (55274 inhabitants)
91 Km NW of Ercolano (53709 inhabitants)
92 Km E of Latina (125985 inhabitants)
94 Km NW of Torre del Greco (86275 inhabitants)
99 Km SE of L'Aquila (69753 inhabitants)
100 Km NW of Avellino (54857 inhabitants)
100 Km S of Pescara (121014 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 2021-08-06
22:28:47		 41.5805 13.9935 8 2021-08-06
22:34:16		 Sala Sismica INGV-Roma 93772541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-06 22:28:47 ± 0.14
Latitude 41.5805 ± 0.0090
Longitude 13.9935 ± 0.0084
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93772541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 959
Semi-minor axis of confidence ellipse (meter) 484
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39930
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 93772541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-06 22:34:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-08-06T22:29:02.12 0.6 undecidable manual S 316 44.3223 50 -0.22 47
IV.VAGA.HHZ. 2021-08-06T22:28:57.88 0.6 undecidable manual S 132 27.1506 107 0.61 43
IV.POFI.HHZ. 2021-08-06T22:28:57.88 0.3 undecidable manual S 303 27.8499 107 0.37 70
IV.INTR.HHZ. 2021-08-06T22:28:56.81 1.0 negative manual P 0.21 0.57
IV.MIDA.HHZ. 2021-08-06T22:28:55.43 0.3 undecidable manual S 72 22.6551 110 -0.38 70
IV.RNI2.HHZ. 2021-08-06T22:28:55.07 0.3 undecidable manual S 44 18.9699 114 0.46 69
IV.VVLD.HHZ. 2021-08-06T22:28:55.61 0.3 undecidable manual P 316 44.3223 50 -0.43 67
IV.LRP.EHZ. 2021-08-06T22:28:54.50 0.3 undecidable manual P 282 34.5432 50 -0.02 74
IV.POFI.HHZ. 2021-08-06T22:28:53.32 0.3 undecidable manual P 303 27.8499 107 0.07 74
IV.VAGA.HHZ. 2021-08-06T22:28:53.13 0.6 negative manual P 132 27.1506 107 0.02 50
IV.RNI2.HHZ. 2021-08-06T22:28:52.08 0.1 undecidable manual P 44 18.9699 114 0.5 92
IV.MIDA.HHZ. 2021-08-06T22:28:52.04 0.1 undecidable manual P 72 22.6551 110 -0.23 97
IV.MCI.EHE. 2021-08-06T22:28:51.51 0.6 undecidable manual P 237 17.9709 115 0.11 50
IV.CERA.HHZ. 2021-08-06T22:28:50.02 0.3 undecidable manual S 47 2.7972 161 -0.46 71
IV.CERA.HHZ. 2021-08-06T22:28:48.96 0.1 undecidable manual P 47 2.7972 161 -0.23 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIDA.HHE. ML:1.0 0.0000764 0.84 AML other m 2021-08-06T22:28:55.88
IV.RNI2.HHE. ML:0.9 0.00006545 0.52 AML other m 2021-08-06T22:28:56.81
IV.RNI2.HHN. ML:1.3 0.0001615 0.2 AML other m 2021-08-06T22:28:57.45
IV.MIDA.HHN. ML:1.1 0.00008565000000000001 0.6 AML other m 2021-08-06T22:28:58.58
IV.VAGA.HHE. ML:0.9 0.00004124999999999999 0.64 AML other m 2021-08-06T22:28:59.49
IV.POFI.HHN. ML:0.7 0.000026349999999999997 0.76 AML other m 2021-08-06T22:29:00.45
IV.VVLD.HHN. ML:1.1 0.00004215 1.5 AML other m 2021-08-06T22:29:03.95
IV.VAGA.HHN. ML:1.3 0.00011690000000000001 1.56 AML other m 2021-08-06T22:29:03.83
IV.VVLD.HHE. ML:1.2 0.00005555 1.56 AML other m 2021-08-06T22:29:03.96
IV.POFI.HHE. ML:0.7 0.000023199999999999998 0.42 AML other m 2021-08-06T22:29:03.96
IV.INTR.HHE. ML:1.2 0.0000457 0.24 AML other m 2021-08-06T22:29:04.47
IV.INTR.HHN. ML:1.3 0.0000533 1.48 AML other m 2021-08-06T22:29:05.02
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