Earthquake with magnitude of ML 1.2 on date 20-10-2021 and time 22:39:35 (Italy) in region 3 km SW Buonalbergo (BN)

A magnitude ML 1.2 earthquake occured in region: 3 km SW Buonalbergo (BN), on

  • 20-10-2021 20:39:35 (UTC)
  • 20-10-2021 22:39:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.207, 14.949 at 17 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
Buonalbergo BN 3 1730 1730
Sant'Arcangelo Trimonte BN 4 573 2303
Casalbore AV 6 1800 4103
Paduli BN 7 3978 8081
Montecalvo Irpino AV 7 3725 11806
Pago Veiano BN 8 2406 14212
San Giorgio La Molara BN 8 2994 17206
Pietrelcina BN 8 3114 20320
Apice BN 10 5686 26006
Molinara BN 10 1618 27624
Ginestra degli Schiavoni BN 11 476 28100
Pesco Sannita BN 12 1972 30072
Bonito AV 12 2448 32520
San Marco dei Cavoti BN 13 3371 35891
Ariano Irpino AV 13 22700 58591
Reino BN 14 1210 59801
Montefalcone di Val Fortore BN 14 1525 61326
Melito Irpino AV 15 1920 63246
Fragneto l'Abate BN 15 1049 64295
Castelfranco in Miscano BN 15 916 65211
Fragneto Monforte BN 16 1840 67051
Calvi BN 16 2682 69733
Benevento BN 16 60091 129824
Foiano di Val Fortore BN 16 1410 131234
Grottaminarda AV 18 8137 139371
San Giorgio del Sannio BN 18 10022 149393
Venticano AV 18 2537 151930
San Nicola Manfredi BN 18 3722 155652
San Martino Sannita BN 18 1230 156882
Mirabella Eclano AV 19 7684 164566
San Nazzaro BN 19 884 165450
Greci AV 19 691 166141
Savignano Irpino AV 19 1140 167281
Pietradefusi AV 19 2348 169629
Sant'Angelo a Cupolo BN 20 4325 173954
Villanova del Battista AV 20 1690 175644
Colle Sannita BN 20 2431 178075

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Benevento (60091 inhabitants)
35 Km NE of Avellino (54857 inhabitants)
54 Km E of Caserta (76326 inhabitants)
56 Km NE of Acerra (59573 inhabitants)
57 Km SW of Foggia (151991 inhabitants)
60 Km NE of Cava de' Tirreni (53659 inhabitants)
61 Km N of Salerno (135261 inhabitants)
62 Km NE of Scafati (50787 inhabitants)
62 Km NE of Afragola (65057 inhabitants)
64 Km SW of San Severo (53905 inhabitants)
65 Km NE of Casoria (77642 inhabitants)
66 Km NE of Portici (55274 inhabitants)
67 Km N of Battipaglia (50786 inhabitants)
67 Km NE of Ercolano (53709 inhabitants)
67 Km E of Aversa (53047 inhabitants)
68 Km NE of Torre del Greco (86275 inhabitants)
69 Km NE of Castellammare di Stabia (66466 inhabitants)
70 Km E of Giugliano in Campania (122974 inhabitants)
71 Km NE of Napoli (974074 inhabitants)
72 Km E of Marano di Napoli (59874 inhabitants)
80 Km W of Cerignola (58396 inhabitants)
82 Km NE of Pozzuoli (81661 inhabitants)
94 Km SW of Manfredonia (57279 inhabitants)
96 Km NW of Potenza (67122 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
Md 1.6
ML 1.2
2021-10-20
20:39:35
41.2068 14.9493 17 2021-10-20
20:45:40
Sala Sismica INGV-Roma 96810151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 20:39:35 ± 0.33
Latitude 41.2068 ± 0.0180
Longitude 14.9493 ± 0.0179
Depth (km) 17 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96810151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1656
Semi-minor axis of confidence ellipse (meter) 1464
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 335
Circular confidence region, given by single value of horizontal uncertainty (meter) 1660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.80849
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 96810151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 20:45:40

Md:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 3
Type of magnitude Md
Reference to an origin 96810151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 20:45:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SGRT.HHZ. 2021-10-20T20:40:02.19 0.6 undecidable manual S 47 0.8085 94 0.47 39
IV.SGRT.HHZ. 2021-10-20T20:39:50.04 0.1 undecidable manual P 47 0.8085 94 -0.49 78
IV.SNAL.HHZ. 2021-10-20T20:39:47.76 0.3 undecidable manual S 145 0.3426 103 -0.28 67
OT.OT05.EHZ. 2021-10-20T20:39:47.54 0.3 negative manual Pg -0.14 1.13
IV.MTMR.EHZ. 2021-10-20T20:39:46.35 3.0 undecidable manual S -0.43 0
IV.SNAL.HHZ. 2021-10-20T20:39:42.26 0.6 undecidable manual P 145 0.3426 103 -0.38 44
IV.MRB1.HHZ. 2021-10-20T20:39:41.56 0.6 undecidable manual S 170 0.0854 145 0.14 49
IV.PSB1.HHZ. 2021-10-20T20:39:41.03 0.3 undecidable manual S 279 0.1052 139 -0.76 61
IV.VITU.HHE. 2021-10-20T20:39:41.52 0.1 undecidable manual P 265 0.241 111 0.56 85
IV.BIOG.HNZ. 2021-10-20T20:39:40.16 0.1 undecidable manual P 93 0.1376 129 0.73 83
IV.PSB1.HHZ. 2021-10-20T20:39:39.25 0.1 positive manual P 279 0.1052 139 0.22 95
IV.MRB1.HHZ. 2021-10-20T20:39:38.82 0.1 negative manual P 170 0.0854 145 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PSB1.HHE. ML:1.3 0.000176 0.48 AML other m 2021-10-20T20:39:42.32
IV.PSB1.HHN. ML:1 9.13E-5 0.72 AML other m 2021-10-20T20:39:42.51
IV.MRB1.HHE. ML:1.5 0.0003015 0.52 AML other m 2021-10-20T20:39:46.41
IV.MRB1.HHN. ML:1.5 0.00028 0.52 AML other m 2021-10-20T20:39:46.42
IV.SNAL.HHE. ML:0.8 1.8540275E-5 0.2304 AML other m 2021-10-20T20:39:50.82
IV.SNAL.HHN. ML:0.8 1.846722E-5 0.5376 AML other m 2021-10-20T20:39:48.17
IV.MRB1.HHZ. Md:1.6 16 END duration s
IV.PSB1.HHZ. Md:1.4 12 END duration s
IV.SNAL.HHZ. Md:1.7 17 END duration s
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