Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-08-2021 and time 03:49:03 (Italy) in region 2 km SW Sassinoro (BN)

A magnitude ML 0.9 earthquake occured in region: 2 km SW Sassinoro (BN), on

  • 04-08-2021 01:49:03 (UTC)
  • 04-08-2021 03:49:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.3670, 14.6450 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Sassinoro BN 2 618 618
Morcone BN 3 4932 5550
Sepino CB 5 1964 7514
Santa Croce del Sannio BN 8 927 8441
Pietraroja BN 8 545 8986
Pontelandolfo BN 10 2167 11153
San Giuliano del Sannio CB 10 1029 12182
Cercepiccola CB 11 681 12863
Campolattaro BN 11 1072 13935
Guardiaregia CB 12 801 14736
San Lupo BN 12 801 15537
Cerreto Sannita BN 12 3940 19477
Cusano Mutri BN 12 4091 23568
Cercemaggiore CB 12 3777 27345
Casalduni BN 13 1378 28723
Guardia Sanframondi BN 13 5078 33801
San Lorenzo Maggiore BN 13 2154 35955
San Lorenzello BN 13 2227 38182
Circello BN 14 2388 40570
Castelpagano BN 14 1483 42053
Campochiaro CB 15 646 42699
Vinchiaturo CB 15 3324 46023
Colle Sannita BN 16 2431 48454
San Polo Matese CB 16 470 48924
Fragneto Monforte BN 17 1840 50764
Castelvenere BN 17 2562 53326
Mirabello Sannitico CB 17 2180 55506
Fragneto l'Abate BN 17 1049 56555
Faicchio BN 17 3634 60189
Reino BN 17 1210 61399
Ponte BN 18 2580 63979
Gildone CB 18 809 64788
Gioia Sannitica CE 18 3638 68426
Ferrazzano CB 18 3344 71770
Telese Terme BN 19 7486 79256
Paupisi BN 19 1633 80889
Colle d'Anchise CB 19 807 81696
San Salvatore Telesino BN 19 3999 85695
Baranello CB 19 2673 88368
Bojano CB 19 8058 96426

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Benevento (60091 inhabitants)
42 Km NE of Caserta (76326 inhabitants)
52 Km N of Avellino (54857 inhabitants)
52 Km NE of Acerra (59573 inhabitants)
57 Km NE of Afragola (65057 inhabitants)
57 Km NE of Aversa (53047 inhabitants)
59 Km NE of Casoria (77642 inhabitants)
61 Km NE of Giugliano in Campania (122974 inhabitants)
64 Km NE of Marano di Napoli (59874 inhabitants)
65 Km NE of Portici (55274 inhabitants)
67 Km NE of Ercolano (53709 inhabitants)
67 Km NE of Napoli (974074 inhabitants)
69 Km NE of Torre del Greco (86275 inhabitants)
70 Km N of Scafati (50787 inhabitants)
71 Km SW of San Severo (53905 inhabitants)
74 Km NE of Pozzuoli (81661 inhabitants)
74 Km N of Cava de' Tirreni (53659 inhabitants)
76 Km W of Foggia (151991 inhabitants)
76 Km N of Castellammare di Stabia (66466 inhabitants)
77 Km N of Salerno (135261 inhabitants)
89 Km NW of Battipaglia (50786 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
Bulletin
Rev1000 		ML 0.9 2021-08-04
01:49:03		 41.3673 14.6453 11 2021-12-29
11:12:41		 Bollettino Sismico Italiano INGV 97116891
Reviewed
Rev100 		ML 1.0 2021-08-04
01:49:02		 41.3777 14.6743 16 2021-08-04
02:03:17		 Sala Sismica INGV-Roma 93645291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-04 01:49:03 ± 0.11
Latitude 41.3673 ± 0.0072
Longitude 14.6453 ± 0.0084
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97116891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 853
Semi-minor axis of confidence ellipse (meter) 353
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 212
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40110
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 93645291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-04 02:03:17

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 97116891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-05 16:03:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2021-08-04T01:50:26.53 3.0 undecidable manual Pg 18.280001 0
HL.VLS.HHZ. 2021-08-04T01:50:22.47 3.0 undecidable manual Pg 15.99 0
IV.APEC.HHZ. 2021-08-04T01:50:20.91 3.0 undecidable manual Sn 0.19 0
IV.NDIM.HHZ. 2021-08-04T01:50:14.82 3.0 negative manual Pn 9.25 0
IV.MMGO.HHZ. 2021-08-04T01:50:07.15 3.0 undecidable manual Pg 12.24 0
SL.LJU.BHZ. 2021-08-04T01:50:05.22 3.0 undecidable manual Pn 1.69 0
IV.FIR.HHZ. 2021-08-04T01:50:00.74 3.0 undecidable manual Pn 7.81 0
IV.GIZZ.HHZ. 2021-08-04T01:49:59.71 3.0 undecidable manual Sn -0.64 0
IV.VENT.EHZ. 2021-08-04T01:49:44.02 3.0 undecidable manual Sn 0.77 0
IV.MMUR.HNZ. 2021-08-04T01:49:35.78 3.0 positive manual Pn -1.1 0
IV.GIZZ.HHZ. 2021-08-04T01:49:31.93 3.0 positive manual Pn 1.28 0
IV.MIDA.HNZ. 2021-08-04T01:49:16.99 0.3 undecidable manual S 313 44.5221 50 -0.52 67
IV.MRB1.HHZ. 2021-08-04T01:49:15.51 1.0 undecidable manual S 135 38.2284 50 -0.31 24
IV.VAGA.HHZ. 2021-08-04T01:49:15.21 0.3 undecidable manual S 279 34.6431 50 0.35 74
IV.SGG.HHN. 2021-08-04T01:49:12.24 0.3 undecidable manual S 276 22.2555 50 0.68 67
IV.VITU.HHZ. 2021-08-04T01:49:11.01 0.3 undecidable manual S 184 20.4684 118 -0.06 80
IV.PSB1.HNE. 2021-08-04T01:49:11.78 1.0 undecidable manual S 139 21.0678 50 0.54 23
IV.VAGA.HHZ. 2021-08-04T01:49:10.00 0.6 negative manual P 279 34.6431 50 0.12 51
IV.MTMR.EHZ. 2021-08-04T01:49:10.47 3.0 undecidable manual S -2.98 0
IV.MIDA.HNZ. 2021-08-04T01:49:10.69 0.3 undecidable manual P 313 44.5221 50 -0.71 21
IV.MRB1.HHZ. 2021-08-04T01:49:10.33 0.3 undecidable manual P 135 38.2284 50 -0.1 75
IV.GATE.HNN. 2021-08-04T01:49:09.45 0.3 undecidable manual P 54 27.3504 50 0.7 67
IV.PTRJ.HNN. 2021-08-04T01:49:08.04 0.3 undecidable manual S 268 9.6792 138 -0.02 80
IV.SGG.HHN. 2021-08-04T01:49:07.67 0.1 undecidable manual P 276 22.2555 50 -0.3 100
IV.VITU.HHZ. 2021-08-04T01:49:07.61 0.6 positive manual P 184 20.4684 118 -0.08 53
IV.PSB1.HNE. 2021-08-04T01:49:07.70 0.3 undecidable manual P 139 21.0678 50 -0.09 79
IV.BSSO.HHZ. 2021-08-04T01:49:07.63 0.3 negative manual P 348 20.2686 118 -0.03 79
IV.PTRJ.HNN. 2021-08-04T01:49:05.87 0.3 undecidable manual P 268 9.6792 138 -0.08 81
IV.SACR.HHZ. 2021-08-04T01:49:05.43 0.3 positive manual P 56 5.994 150 -0.09 82
IV.MCRV.HHZ. 2021-08-04T01:49:04.17 3.0 undecidable manual P -0.74 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACR.HHE. ML:0.8 0.000096572275 0.18 AML other m 2021-08-04T01:49:08.21
IV.SACR.HHN. ML:0.8 0.00009744035499999999 0.16 AML other m 2021-08-04T01:49:08.26
IV.BSSO.HHE. ML:0.7 0.00003715 0.64 AML other m 2021-08-04T01:49:11.65
IV.VITU.HHN. ML:1.1 0.00009705 0.26 AML other m 2021-08-04T01:49:13.05
IV.BSSO.HHN. ML:0.6 0.000032060285 0.28 AML other m 2021-08-04T01:49:14.26
IV.VITU.HHE. ML:1.0 0.000071308555 0.22 AML other m 2021-08-04T01:49:11.70
IV.VAGA.HHE. ML:0.8 0.000024689040000000003 0.26 AML other m 2021-08-04T01:49:18.72
IV.VAGA.HHN. ML:1.2 0.00005755 0.36 AML other m 2021-08-04T01:49:20.12
IV.VITU.HNN. ML:1.3 0.00013629789 1.14 AML other m 2021-08-04T01:49:18.41
IV.VAGA.HNE. ML:0.9 0.00003274303 0.3904 AML other m 2021-08-04T01:49:17.73
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