Earthquake with magnitude of ML 0.8 on date 17-09-2021 and time 01:23:08 (Italy) in region 2 km SW Castelpetroso (IS)

A magnitude ML 0.8 earthquake occured in region: 2 km SW Castelpetroso (IS), on

  • 16-09-2021 23:23:08 (UTC)
  • 17-09-2021 01:23:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.548, 14.336 at 11 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
Castelpetroso IS 2 1680 1680
Santa Maria del Molise IS 3 665 2345
Castelpizzuto IS 5 155 2500
Carpinone IS 5 1157 3657
Cantalupo nel Sannio IS 6 739 4396
Pettoranello del Molise IS 6 460 4856
Roccamandolfi IS 6 938 5794
Macchiagodena IS 6 1854 7648
Longano IS 8 690 8338
Pesche IS 8 1661 9999
San Massimo CB 9 855 10854
Sant'Agapito IS 9 1496 12350
Isernia IS 10 21842 34192
Sessano del Molise IS 10 727 34919
Frosolone IS 11 3170 38089
Sant'Elena Sannita IS 12 275 38364
Letino CE 13 712 39076
Spinete CB 13 1320 40396
Gallo Matese CE 13 579 40975
Miranda IS 13 1047 42022
Bojano CB 13 8058 50080
Monteroduni IS 14 2264 52344
Macchia d'Isernia IS 14 1035 53379
Civitanova del Sannio IS 15 945 54324
Pescolanciano IS 15 855 55179
Valle Agricola CE 15 890 56069
Chiauci IS 15 233 56302
Colle d'Anchise CB 16 807 57109
Duronia CB 16 405 57514
Fontegreca CE 16 811 58325
Molise CB 16 167 58492
San Polo Matese CB 16 470 58962
Casalciprano CB 17 564 59526
Prata Sannita CE 17 1502 61028
Fornelli IS 17 1909 62937
Campochiaro CB 18 646 63583
Capriati a Volturno CE 18 1541 65124
Ciorlano CE 18 426 65550
San Gregorio Matese CE 18 988 66538
Montaquila IS 18 2456 68994
Torella del Sannio CB 19 795 69789
Carovilli IS 19 1359 71148
Baranello CB 19 2673 73821
Roccasicura IS 19 550 74371
Busso CB 19 1273 75644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km N of Caserta (76326 inhabitants)
60 Km NW of Benevento (60091 inhabitants)
65 Km N of Aversa (53047 inhabitants)
67 Km N of Acerra (59573 inhabitants)
70 Km N of Afragola (65057 inhabitants)
70 Km N of Giugliano in Campania (122974 inhabitants)
71 Km N of Casoria (77642 inhabitants)
73 Km N of Marano di Napoli (59874 inhabitants)
79 Km N of Napoli (974074 inhabitants)
80 Km NW of Avellino (54857 inhabitants)
80 Km N of Portici (55274 inhabitants)
81 Km N of Pozzuoli (81661 inhabitants)
82 Km N of Ercolano (53709 inhabitants)
85 Km N of Torre del Greco (86275 inhabitants)
88 Km W of San Severo (53905 inhabitants)
90 Km N of Scafati (50787 inhabitants)
91 Km S of Chieti (51815 inhabitants)
96 Km N of Castellammare di Stabia (66466 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 0.8 2021-09-16
23:23:08
41.5477 14.3355 11 2021-09-16
23:41:00
Sala Sismica INGV-Roma 95526401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-16 23:23:08 ± 0.08
Latitude 41.5477 ± 0.0027
Longitude 14.3355 ± 0.0048
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95526401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 351
Semi-minor axis of confidence ellipse (meter) 272
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 14
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) 0.24282
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95526401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-16 23:41:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-09-16T23:24:35.10 3.0 undecidable manual Sn -4.42 0
OT.OT14.EHZ. 2021-09-16T23:24:00.51 3.0 undecidable manual Sn 0.24 0
IV.MILZ.HHZ. 2021-09-16T23:23:55.26 3.0 undecidable manual Pg 5.68 0
IV.AGLI.HHZ. 2021-09-16T23:23:51.30 3.0 undecidable manual Sn -3.22 0
IV.AGLI.HHZ. 2021-09-16T23:23:25.54 3.0 undecidable manual Pg 0.37 0
IV.CERA.HHZ. 2021-09-16T23:23:18.43 0.3 undecidable manual S 282 0.2428 50 0.3 72
IV.RNI2.HNE. 2021-09-16T23:23:17.48 0.3 undecidable manual S 319 0.2068 50 0.39 70
IV.BSSO.HHZ. 2021-09-16T23:23:17.07 0.3 undecidable manual S 90 0.1934 50 0.4 68
IV.TST01.HHE. 2021-09-16T23:23:17.15 0.3 undecidable manual S 11 0.205 50 0.13 73
IV.VAGA.HHZ. 2021-09-16T23:23:15.46 0.3 undecidable manual S 210 0.152 122 0.11 73
IV.SGG.HHZ. 2021-09-16T23:23:15.71 0.3 undecidable manual S 168 0.1637 120 -0.03 75
IV.APEC.HHZ. 2021-09-16T23:23:14.40 3.0 undecidable manual Pn -0.14 0
IV.MIDA.HHZ. 2021-09-16T23:23:14.13 0.3 undecidable manual S 327 0.1124 131 0.03 74
IV.BSSO.HHZ. 2021-09-16T23:23:13.17 0.1 undecidable manual P 90 0.1934 50 -0.01 100
IV.CERA.HHZ. 2021-09-16T23:23:13.84 0.1 undecidable manual P 282 0.2428 50 -0.18 93
IV.TST01.HHE. 2021-09-16T23:23:13.31 0.1 undecidable manual P 11 0.205 50 -0.06 98
IV.RNI2.HNE. 2021-09-16T23:23:13.30 0.1 undecidable manual P 319 0.2068 50 -0.12 96
IV.VAGA.HHZ. 2021-09-16T23:23:12.47 0.1 undecidable manual P 210 0.152 122 0.05 99
IV.SGG.HHZ. 2021-09-16T23:23:12.48 0.1 undecidable manual P 168 0.1637 120 -0.16 97
IV.MIDA.HHZ. 2021-09-16T23:23:11.57 0.1 undecidable manual P 327 0.1124 131 -0.12 100
IV.CSP1.EHZ. 2021-09-16T23:23:11.26 3.0 positive manual P 0.79 0
IV.MOMA.HHZ. 2021-09-16T23:23:00.96 3.0 undecidable manual P -3.5 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIDA.HHN. ML:0.6 3.785E-5 0.5 AML other m 2021-09-16T23:23:14.74
IV.MIDA.HHE. ML:0.6 3.76E-5 0.26 AML other m 2021-09-16T23:23:15.76
IV.SGG.HHN. ML:0.8 4.87E-5 0.88 AML other m 2021-09-16T23:23:17.86
IV.VAGA.HHE. ML:0.6 3.535E-5 1.28 AML other m 2021-09-16T23:23:18.87
IV.VAGA.HHN. ML:1.1 0.0001155 0.8 AML other m 2021-09-16T23:23:18.28
IV.SGG.HHE. ML:0.8 5.205E-5 0.88 AML other m 2021-09-16T23:23:18.36
IV.BSSO.HHE. ML:1 6.1E-5 0.84 AML other m 2021-09-16T23:23:19.71
IV.BSSO.HHN. ML:0.8 4.515E-5 1.18 AML other m 2021-09-16T23:23:20.82
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