Earthquake with magnitude of ML 1.0 on date 10-08-2021 and time 13:30:51 (Italy) in region 3 km N San Giuliano del Sannio (CB)

A magnitude ML 1.0 earthquake occured in region: 3 km N San Giuliano del Sannio (CB), on

  • 10-08-2021 11:30:51 (UTC)
  • 10-08-2021 13:30:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.482, 14.64 at 16 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
San Giuliano del Sannio CB 3 1029 1029
Cercepiccola CB 3 681 1710
Vinchiaturo CB 5 3324 5034
Mirabello Sannitico CB 5 2180 7214
Ferrazzano CB 6 3344 10558
Cercemaggiore CB 7 3777 14335
Baranello CB 8 2673 17008
Sepino CB 8 1964 18972
Campobasso CB 9 49431 68403
Gildone CB 9 809 69212
Guardiaregia CB 10 801 70013
Busso CB 10 1273 71286
Colle d'Anchise CB 11 807 72093
Campochiaro CB 12 646 72739
Sassinoro BN 12 618 73357
San Polo Matese CB 12 470 73827
Campodipietra CB 12 2570 76397
Oratino CB 13 1641 78038
Santa Croce del Sannio BN 13 927 78965
Jelsi CB 14 1781 80746
Bojano CB 14 8058 88804
Spinete CB 14 1320 90124
Casalciprano CB 15 564 90688
Ripalimosani CB 15 3114 93802
Toro CB 15 1391 95193
San Giovanni in Galdo CB 15 580 95773
Morcone BN 16 4932 100705
Matrice CB 16 1115 101820
Riccia CB 17 5262 107082
Castelpagano BN 17 1483 108565
Pietraroja BN 17 545 109110
Castropignano CB 17 947 110057
Sant'Elena Sannita IS 18 275 110332
Montagano CB 19 1086 111418
San Massimo CB 19 855 112273
Cusano Mutri BN 19 4091 116364
Circello BN 20 2388 118752

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km N of Benevento (60091 inhabitants)
52 Km NE of Caserta (76326 inhabitants)
64 Km NE of Acerra (59573 inhabitants)
64 Km N of Avellino (54857 inhabitants)
66 Km W of San Severo (53905 inhabitants)
67 Km NE of Aversa (53047 inhabitants)
68 Km NE of Afragola (65057 inhabitants)
70 Km NE of Casoria (77642 inhabitants)
72 Km NE of Giugliano in Campania (122974 inhabitants)
75 Km NE of Marano di Napoli (59874 inhabitants)
75 Km W of Foggia (151991 inhabitants)
77 Km NE of Portici (55274 inhabitants)
78 Km NE of Napoli (974074 inhabitants)
79 Km NE of Ercolano (53709 inhabitants)
81 Km N of Torre del Greco (86275 inhabitants)
82 Km N of Scafati (50787 inhabitants)
84 Km NE of Pozzuoli (81661 inhabitants)
87 Km N of Cava de' Tirreni (53659 inhabitants)
88 Km N of Castellammare di Stabia (66466 inhabitants)
90 Km N of Salerno (135261 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 1.0 2021-08-10
11:30:51
41.4815 14.6397 16 2021-08-10
11:37:07
Sala Sismica INGV-Roma 93920451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-10 11:30:51 ± 0.23
Latitude 41.4815 ± 0.0108
Longitude 14.6397 ± 0.0120
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93920451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1125
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 331
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
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) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.80489
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

Field Value
Value 1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 93920451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-10 11:37:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LRP.EHZ. 2021-08-10T11:31:17.02 0.6 undecidable manual S 282 0.8049 93 -0.39 40
IV.MELA.HHZ. 2021-08-10T11:31:06.35 0.6 undecidable manual S 58 0.4281 98 0.07 46
IV.LRP.EHZ. 2021-08-10T11:31:06.27 1.0 positive manual P 282 0.8049 93 -0.01 22
IV.LPEL.HHZ. 2021-08-10T11:31:03.15 0.1 undecidable manual P 329 0.6592 94 -0.65 76
IV.CIGN.HHZ. 2021-08-10T11:31:02.04 0.6 undecidable manual S 49 0.2626 105 0.56 43
IV.SGG.HHZ. 2021-08-10T11:31:00.68 0.3 undecidable manual S 244 0.2167 110 0.5 66
IV.MELA.HHZ. 2021-08-10T11:30:59.49 0.6 undecidable manual P 58 0.4281 98 -0.36 43
IV.TRIV.HHZ. 2021-08-10T11:30:58.15 0.6 positive manual P 347 0.2923 103 0.57 42
IV.CIGN.HHZ. 2021-08-10T11:30:57.30 0.1 undecidable manual P 49 0.2626 105 0.22 93
IV.SGG.HHZ. 2021-08-10T11:30:56.81 0.6 positive manual P 244 0.2167 110 0.48 44
IV.BSSO.HHZ. 2021-08-10T11:30:56.53 0.6 undecidable manual S 332 0.0728 147 -0.23 48
IV.SACR.HHZ. 2021-08-10T11:30:56.92 0.6 undecidable manual S 150 0.0971 138 -0.28 47
IV.BSSO.HHZ. 2021-08-10T11:30:54.34 0.1 negative manual P 332 0.0728 147 -0.01 100
IV.SACR.HHZ. 2021-08-10T11:30:54.39 0.1 negative manual P 150 0.0971 138 -0.22 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACR.HHN. ML:1.2 0.000138 1.76 AML other m 2021-08-10T11:30:56.95
IV.SACR.HHE. ML:1.3 0.000166 1.26 AML other m 2021-08-10T11:30:56.96
IV.BSSO.HHE. ML:1.2 0.000143 1.1 AML other m 2021-08-10T11:30:57.75
IV.BSSO.HHN. ML:1 0.00011065 1.6 AML other m 2021-08-10T11:30:59.86
IV.SGG.HHN. ML:0.9 4.315E-5 0.3 AML other m 2021-08-10T11:31:02.44
IV.SGG.HHE. ML:0.8 3.31E-5 0.18 AML other m 2021-08-10T11:31:02.40
IV.MELA.HHE. ML:1.1 3.458314E-5 1.5424 AML other m 2021-08-10T11:31:09.03
IV.MELA.HHN. ML:0.8 1.361586E-5 0.2624 AML other m 2021-08-10T11:31:06.58
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