Earthquake with magnitude of ML 1.2 on date 24-09-2021 and time 07:41:33 (Italy) in region 3 km W Longano (IS)

A magnitude ML 1.2 earthquake occured in region: 3 km W Longano (IS), on

  • 24-09-2021 05:41:33 (UTC)
  • 24-09-2021 07:41:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.514, 14.214 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Longano IS 3 690 690
Monteroduni IS 3 2264 2954
Sant'Agapito IS 3 1496 4450
Gallo Matese CE 6 579 5029
Macchia d'Isernia IS 7 1035 6064
Castelpizzuto IS 7 155 6219
Fontegreca CE 7 811 7030
Capriati a Volturno CE 7 1541 8571
Letino CE 8 712 9283
Ciorlano CE 8 426 9709
Isernia IS 8 21842 31551
Pettoranello del Molise IS 9 460 32011
Prata Sannita CE 9 1502 33513
Montaquila IS 10 2456 35969
Valle Agricola CE 11 890 36859
Roccamandolfi IS 12 938 37797
Fornelli IS 12 1909 39706
Castelpetroso IS 12 1680 41386
Pesche IS 12 1661 43047
Pratella CE 12 1565 44612
Pozzilli IS 13 2380 46992
Carpinone IS 13 1157 48149
Colli a Volturno IS 13 1349 49498
Filignano IS 14 648 50146
Ailano CE 14 1369 51515
Santa Maria del Molise IS 14 665 52180
Venafro IS 14 11280 63460
Miranda IS 15 1047 64507
Cantalupo nel Sannio IS 15 739 65246
Sesto Campano IS 15 2388 67634
Raviscanina CE 16 1319 68953
Rocchetta a Volturno IS 16 1113 70066
San Massimo CB 17 855 70921
Macchiagodena IS 17 1854 72775
Scapoli IS 17 680 73455
Sessano del Molise IS 17 727 74182
Sant'Angelo d'Alife CE 17 2270 76452
Conca Casale IS 17 200 76652
Cerro al Volturno IS 18 1281 77933
Acquaviva d'Isernia IS 18 425 78358
Presenzano CE 19 1766 80124
San Gregorio Matese CE 20 988 81112

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km N of Caserta (76326 inhabitants)
60 Km N of Aversa (53047 inhabitants)
64 Km NW of Benevento (60091 inhabitants)
65 Km N of Acerra (59573 inhabitants)
65 Km N of Giugliano in Campania (122974 inhabitants)
66 Km N of Afragola (65057 inhabitants)
68 Km N of Casoria (77642 inhabitants)
68 Km N of Marano di Napoli (59874 inhabitants)
75 Km N of Pozzuoli (81661 inhabitants)
75 Km N of Napoli (974074 inhabitants)
78 Km N of Portici (55274 inhabitants)
79 Km N of Ercolano (53709 inhabitants)
82 Km N of Torre del Greco (86275 inhabitants)
83 Km NW of Avellino (54857 inhabitants)
89 Km N of Scafati (50787 inhabitants)
93 Km S of Chieti (51815 inhabitants)
94 Km N of Castellammare di Stabia (66466 inhabitants)
99 Km W of San Severo (53905 inhabitants)
99 Km NW of Cava de' Tirreni (53659 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 1.2 2021-09-24
05:41:33
41.5145 14.2135 8 2021-09-24
05:49:34
Sala Sismica INGV-Roma 95810971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 05:41:33 ± 0.2
Latitude 41.5145 ± 0.0036
Longitude 14.2135 ± 0.0072
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95810971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 607
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 57
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 95810971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 05:49:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.FIE.HGZ. 2021-09-24T05:43:16.43 3.0 undecidable manual Sg 16.9 0
IV.AGLI.HHZ. 2021-09-24T05:43:12.87 3.0 undecidable manual Sn 0.99 0
IV.BRSN.EHZ. 2021-09-24T05:43:11.31 3.0 undecidable manual Sg 11.36 0
IV.ACATE.HNZ. 2021-09-24T05:43:08.82 3.0 undecidable manual Sn -0.67 0
IV.SARZ.HHZ. 2021-09-24T05:43:02.62 3.0 positive manual Pg 18.940001 0
IV.CADC.EHZ. 2021-09-24T05:43:01.05 3.0 undecidable manual Pg 20.07 0
GU.RNCA.HHZ. 2021-09-24T05:42:58.71 3.0 undecidable manual Pg 18.629999 0
IV.MBAL.EHZ. 2021-09-24T05:42:55.39 3.0 negative manual Pg 15.9 0
IV.ZEN8.EHZ. 2021-09-24T05:42:49.97 3.0 undecidable manual Pg 10.48 0
IV.EFIU.HHZ. 2021-09-24T05:42:44.05 3.0 undecidable manual Sn -7.36 0
IV.PE3.EHZ. 2021-09-24T05:42:42.95 3.0 undecidable manual Sn -1.16 0
IV.VOBA.EHZ. 2021-09-24T05:42:41.55 3.0 negative manual Pn 0.75 0
IV.SENA.HHZ. 2021-09-24T05:42:27.70 3.0 positive manual Pn 5.96 0
MN.PDG.HHZ. 2021-09-24T05:42:25.99 3.0 negative manual Pg 10.2 0
IV.ALJA.HHZ. 2021-09-24T05:42:12.69 3.0 negative manual Pn -0.81 0
IV.RCAV.EHZ. 2021-09-24T05:42:05.58 3.0 undecidable manual Sn -2.34 0
IV.ARVD.HHZ. 2021-09-24T05:42:04.98 3.0 negative manual Pg 1.56 0
CR.STON.BHZ. 2021-09-24T05:42:04.92 3.0 undecidable manual Pg 0.15 0
IV.ARRO.EHZ. 2021-09-24T05:41:54.26 3.0 negative manual Pn -0.46 0
IV.PTRJ.HHE. 2021-09-24T05:41:44.66 0.6 undecidable manual S 122 0.2797 105 -0.1 51
IV.LRP.EHZ. 2021-09-24T05:41:43.92 3.0 undecidable manual Pg 2.64 0
IV.SGG.HHZ. 2021-09-24T05:41:41.30 0.3 undecidable manual S 136 0.1781 113 0.26 75
IV.PTRJ.HHE. 2021-09-24T05:41:40.21 0.3 undecidable manual P 122 0.2797 105 0.18 75
IV.CERA.HHZ. 2021-09-24T05:41:40.80 0.3 undecidable manual S 300 0.1682 114 0.12 77
IV.MIDA.HHZ. 2021-09-24T05:41:39.38 0.3 undecidable manual S 13 0.1313 120 -0.02 79
IV.RNI2.HHE. 2021-09-24T05:41:38.38 0.3 undecidable manual P 346 0.1943 111 0.17 76
IV.VAGA.HHZ. 2021-09-24T05:41:38.48 0.3 undecidable manual S 171 0.0998 127 0.06 79
IV.SGG.HHZ. 2021-09-24T05:41:37.67 1.0 positive manual P 136 0.1781 113 -0.21 25
IV.CERA.HHZ. 2021-09-24T05:41:37.68 0.3 positive manual P 300 0.1682 114 0 79
IV.VAGA.HHZ. 2021-09-24T05:41:36.05 0.1 negative manual P 171 0.0998 127 -0.32 100
IV.MIDA.HHZ. 2021-09-24T05:41:36.73 0.3 undecidable manual P 13 0.1313 120 -0.21 76
IX.SSB3.HHZ.02 2021-09-24T05:41:34.92 3.0 undecidable manual P -0.24 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VAGA.HNE. ML:1.5 0.00037176955 0.192 AML other m 2021-09-24T05:41:39.86
IV.VAGA.HHN. ML:1.7 0.0006675 0.44 AML other m 2021-09-24T05:41:39.57
IV.VAGA.HNN. ML:1.7 0.0006485 0.44 AML other m 2021-09-24T05:41:39.57
IV.VAGA.HHE. ML:1.4 0.0003023425 0.1408 AML other m 2021-09-24T05:41:40.48
IV.CERA.HHN. ML:1.3 0.0001645 1.68 AML other m 2021-09-24T05:41:41.89
IV.MIDA.HHE. ML:0.9 7.2950955E-5 0.16 AML other m 2021-09-24T05:41:41.54
IV.MIDA.HHN. ML:1 9.564298E-5 0.16 AML other m 2021-09-24T05:41:42.94
IV.SGG.HHE. ML:1.2 0.000121 0.4 AML other m 2021-09-24T05:41:43.25
IV.SGG.HHN. ML:1.2 0.000123 0.34 AML other m 2021-09-24T05:41:43.57
IV.CERA.HHE. ML:1.1 0.00010145 0.46 AML other m 2021-09-24T05:41:44.62
IV.MIDA.HNE. ML:0.9 9.0373485E-5 0.16 AML other m 2021-09-24T05:41:42.94
IV.SGG.HNN. ML:1.3 0.0001448513 0.672 AML other m 2021-09-24T05:41:45.19
IV.CERA.HNE. ML:1.1 0.00010362868 0.5888 AML other m 2021-09-24T05:41:44.42
IV.CERA.HNN. ML:1.3 0.00016102045 0.3104 AML other m 2021-09-24T05:41:40.90
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