Earthquake with magnitude of ML 1.8 on date 20-09-2021 and time 07:12:00 (Italy) in region 3 km N Capriati a Volturno (CE)

A magnitude ML 1.8 earthquake occured in region: 3 km N Capriati a Volturno (CE), on

  • 20-09-2021 05:12:00 (UTC)
  • 20-09-2021 07:12:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.498, 14.143 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Capriati a Volturno CE 3 1541 1541
Monteroduni IS 4 2264 3805
Ciorlano CE 5 426 4231
Fontegreca CE 6 811 5042
Pozzilli IS 7 2380 7422
Macchia d'Isernia IS 8 1035 8457
Gallo Matese CE 8 579 9036
Montaquila IS 8 2456 11492
Venafro IS 8 11280 22772
Sant'Agapito IS 8 1496 24268
Prata Sannita CE 9 1502 25770
Filignano IS 9 648 26418
Longano IS 9 690 27108
Sesto Campano IS 10 2388 29496
Letino CE 10 712 30208
Pratella CE 11 1565 31773
Conca Casale IS 11 200 31973
Colli a Volturno IS 12 1349 33322
Fornelli IS 12 1909 35231
Isernia IS 12 21842 57073
Valle Agricola CE 13 890 57963
Castelpizzuto IS 13 155 58118
Ailano CE 13 1369 59487
Pettoranello del Molise IS 14 460 59947
Presenzano CE 14 1766 61713
Viticuso FR 15 353 62066
Scapoli IS 15 680 62746
Rocchetta a Volturno IS 15 1113 63859
Mignano Monte Lungo CE 16 3250 67109
San Pietro Infine CE 16 944 68053
Raviscanina CE 16 1319 69372
Acquafondata FR 17 263 69635
Pesche IS 17 1661 71296
Roccamandolfi IS 17 938 72234
San Vittore del Lazio FR 18 2636 74870
Cerro al Volturno IS 18 1281 76151
Sant'Angelo d'Alife CE 18 2270 78421
Vairano Patenora CE 18 6594 85015
Castelpetroso IS 18 1680 86695
Carpinone IS 18 1157 87852
Miranda IS 19 1047 88899
Castel San Vincenzo IS 19 516 89415
Acquaviva d'Isernia IS 20 425 89840
Pietravairano CE 20 2984 92824
Cervaro FR 20 8109 100933

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km NW of Caserta (76326 inhabitants)
59 Km N of Aversa (53047 inhabitants)
63 Km N of Giugliano in Campania (122974 inhabitants)
64 Km NW of Acerra (59573 inhabitants)
65 Km N of Afragola (65057 inhabitants)
67 Km N of Marano di Napoli (59874 inhabitants)
67 Km N of Casoria (77642 inhabitants)
67 Km NW of Benevento (60091 inhabitants)
72 Km N of Pozzuoli (81661 inhabitants)
74 Km N of Napoli (974074 inhabitants)
77 Km N of Portici (55274 inhabitants)
78 Km N of Ercolano (53709 inhabitants)
81 Km N of Torre del Greco (86275 inhabitants)
85 Km NW of Avellino (54857 inhabitants)
89 Km NW of Scafati (50787 inhabitants)
94 Km NW of Castellammare di Stabia (66466 inhabitants)
95 Km S of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
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 (http://www.haisentitoilterremoto.it/) 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
Reviewed
Rev100
ML 1.8 2021-09-20
05:12:00
41.4982 14.1427 9 2021-09-20
05:22:53
Sala Sismica INGV-Roma 95650381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 05:12:00 ± 0.16
Latitude 41.4982 ± 0.0099
Longitude 14.1427 ± 0.0144
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 95650381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1407
Semi-minor axis of confidence ellipse (meter) 623
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 1410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.54949
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 95650381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 05:22:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-09-20T05:12:19.67 0.6 undecidable manual S 314 0.5369 50 0.25 45
IV.LPEL.HHZ. 2021-09-20T05:12:19.77 1.0 undecidable manual S 3 0.5495 50 -0.02 24
IV.VITU.HNN. 2021-09-20T05:12:19.29 0.6 undecidable manual S 131 0.482 50 1.48 27
IV.INTR.HHZ. 2021-09-20T05:12:19.82 0.6 undecidable manual S 341 0.5432 50 0.22 46
IV.POFI.HNN. 2021-09-20T05:12:15.85 0.6 undecidable manual S 304 0.3894 50 0.8 39
IV.BSSO.HHZ. 2021-09-20T05:12:14.76 0.6 undecidable manual S 82 0.3408 50 1.14 34
IV.INTR.HHZ. 2021-09-20T05:12:11.19 0.1 undecidable manual P 341 0.5432 50 -0.41 88
IV.VVLD.HHZ. 2021-09-20T05:12:11.22 0.1 undecidable manual P 314 0.5369 50 -0.27 90
IV.LPEL.HHZ. 2021-09-20T05:12:11.22 1.0 undecidable manual P 3 0.5495 50 -0.48 22
IV.VITU.HNN. 2021-09-20T05:12:10.21 0.6 undecidable manual P 131 0.482 50 -0.35 45
IV.SGG.HHZ. 2021-09-20T05:12:09.89 0.3 undecidable manual S 122 0.2095 112 0.56 67
IV.POFI.HNN. 2021-09-20T05:12:08.94 0.6 undecidable manual P 304 0.3894 50 -0.03 49
IV.MIDA.HHZ. 2021-09-20T05:12:08.30 0.3 undecidable manual S 30 0.1664 117 0.49 70
IV.BSSO.HHZ. 2021-09-20T05:12:07.59 0.3 undecidable manual P 82 0.3408 50 -0.55 66
IV.PTRJ.HNE. 2021-09-20T05:12:07.60 1.0 undecidable manual P 115 0.3193 50 -0.17 24
IV.TST01.HHE. 2021-09-20T05:12:06.88 0.6 undecidable manual P 36 0.3103 50 -0.73 41
IV.VAGA.HHZ. 2021-09-20T05:12:06.12 0.3 undecidable manual S 140 0.107 128 0.22 75
IV.SGG.HHZ. 2021-09-20T05:12:05.00 0.1 undecidable manual P 122 0.2095 112 -0.67 86
IV.RNI2.HHZ. 2021-09-20T05:12:05.80 0.3 undecidable manual P 2 0.205 112 0.22 73
IV.MIDA.HHZ. 2021-09-20T05:12:04.25 0.1 positive manual P 30 0.1664 117 -0.54 91
IV.CERA.HHZ. 2021-09-20T05:12:04.98 0.3 positive manual P 317 0.1367 121 0.77 63
IV.VAGA.HHZ. 2021-09-20T05:12:03.49 0.1 positive manual P 140 0.107 128 -0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VAGA.HHE. ML:2.1 0.001355 1.02 AML other m 2021-09-20T05:12:07.21
IV.VAGA.HHN. ML:2.6 0.0046 0.8 AML other m 2021-09-20T05:12:07.86
IV.VAGA.HNN. ML:2.6 0.0044 0.8 AML other m 2021-09-20T05:12:07.86
IV.VAGA.HNE. ML:2.2 0.001915 0.38 AML other m 2021-09-20T05:12:07.79
IV.MIDA.HNE. ML:1.8 0.00046 0.8 AML other m 2021-09-20T05:12:08.87
IV.MIDA.HHN. ML:1.8 0.0004775 0.2 AML other m 2021-09-20T05:12:08.87
IV.MIDA.HHE. ML:1.8 0.0005105 1.18 AML other m 2021-09-20T05:12:09.00
IV.MIDA.HNN. ML:1.8 0.0004785 1.18 AML other m 2021-09-20T05:12:09.00
IV.SGG.HHE. ML:2 0.000675 1.48 AML other m 2021-09-20T05:12:10.78
IV.SGG.HHN. ML:2 0.000656 1.48 AML other m 2021-09-20T05:12:11.92
IV.CERA.HNE. ML:1.7 0.0004795 0.58 AML other m 2021-09-20T05:12:12.40
IV.CERA.HHN. ML:1.7 0.0005355 0.88 AML other m 2021-09-20T05:12:12.56
IV.CERA.HNN. ML:1.7 0.000526 0.88 AML other m 2021-09-20T05:12:12.57
IV.CERA.HHE. ML:1.6 0.0004 0.48 AML other m 2021-09-20T05:12:13.35
IV.RNI2.HHN. ML:1.6 0.000267 1.32 AML other m 2021-09-20T05:12:15.71
IV.BSSO.HHN. ML:1.7 0.0002045 0.66 AML other m 2021-09-20T05:12:18.03
IV.BSSO.HHE. ML:1.7 0.0001875 0.42 AML other m 2021-09-20T05:12:21.10
IV.VVLD.HHN. ML:1.5 6.395E-5 1.38 AML other m 2021-09-20T05:12:22.90
IV.VVLD.HHE. ML:1.4 5.595E-5 0.42 AML other m 2021-09-20T05:12:24.26
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