Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-08-2020 and time 13:36:20 (Italy) in region 3 km NE Sant'Arcangelo Trimonte (BN)

A magnitude ML 1.1 earthquake occured in region: 3 km NE Sant'Arcangelo Trimonte (BN), on

  • 23-08-2020 11:36:20 (UTC)
  • 23-08-2020 13:36:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.1900, 14.9660 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
Sant'Arcangelo Trimonte BN 3 573 573
Buonalbergo BN 4 1730 2303
Montecalvo Irpino AV 6 3725 6028
Casalbore AV 6 1800 7828
Paduli BN 7 3978 11806
Apice BN 8 5686 17492
Pietrelcina BN 10 3114 20606
San Giorgio La Molara BN 10 2994 23600
Pago Veiano BN 10 2406 26006
Bonito AV 10 2448 28454
Ariano Irpino AV 11 22700 51154
Ginestra degli Schiavoni BN 12 476 51630
Melito Irpino AV 12 1920 53550
Molinara BN 13 1618 55168
Pesco Sannita BN 14 1972 57140
San Marco dei Cavoti BN 15 3371 60511
Castelfranco in Miscano BN 15 916 61427
Grottaminarda AV 15 8137 69564
Calvi BN 15 2682 72246
Montefalcone di Val Fortore BN 16 1525 73771
Venticano AV 16 2537 76308
Reino BN 17 1210 77518
Mirabella Eclano AV 17 7684 85202
Benevento BN 17 60091 145293
San Giorgio del Sannio BN 17 10022 155315
Fragneto l'Abate BN 17 1049 156364
San Martino Sannita BN 18 1230 157594
San Nicola Manfredi BN 18 3722 161316
Villanova del Battista AV 18 1690 163006
San Nazzaro BN 18 884 163890
Fragneto Monforte BN 18 1840 165730
Pietradefusi AV 18 2348 168078
Foiano di Val Fortore BN 18 1410 169488
Savignano Irpino AV 18 1140 170628
Greci AV 18 691 171319
Montefusco AV 19 1338 172657
Sant'Angelo a Cupolo BN 19 4325 176982
Torre Le Nocelle AV 19 1324 178306
Fontanarosa AV 19 3170 181476

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Benevento (60091 inhabitants)
34 Km NE of Avellino (54857 inhabitants)
55 Km E of Caserta (76326 inhabitants)
57 Km E of Acerra (59573 inhabitants)
57 Km SW of Foggia (151991 inhabitants)
59 Km NE of Cava de' Tirreni (53659 inhabitants)
59 Km N of Salerno (135261 inhabitants)
61 Km NE of Scafati (50787 inhabitants)
63 Km E of Afragola (65057 inhabitants)
65 Km N of Battipaglia (50786 inhabitants)
65 Km NE of Casoria (77642 inhabitants)
65 Km SW of San Severo (53905 inhabitants)
66 Km NE of Portici (55274 inhabitants)
67 Km NE of Ercolano (53709 inhabitants)
67 Km NE of Torre del Greco (86275 inhabitants)
68 Km E of Aversa (53047 inhabitants)
69 Km NE of Castellammare di Stabia (66466 inhabitants)
70 Km E of Giugliano in Campania (122974 inhabitants)
72 Km NE of Napoli (974074 inhabitants)
73 Km E of Marano di Napoli (59874 inhabitants)
79 Km W of Cerignola (58396 inhabitants)
83 Km E of Pozzuoli (81661 inhabitants)
93 Km SW of Manfredonia (57279 inhabitants)
93 Km NW of Potenza (67122 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 1.1 2020-08-23
11:36:20		 41.1905 14.9665 11 2020-11-19
12:37:06		 Bollettino Sismico Italiano INGV 84667121
Reviewed
Rev100 		ML 1.1 2020-08-23
11:36:20		 41.1673 14.9525 10 2020-08-23
12:20:00		 Sala Sismica INGV-Roma 82257541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-23 11:36:20 ± 0.11
Latitude 41.1905 ± 0.0072
Longitude 14.9665 ± 0.0096
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 84667121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 943
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 0.81029
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84667121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-12 11:32:49

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 82257541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-23 12:20:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SGRT.HHE. 2020-08-23T11:36:47.91 0.6 undecidable manual S 46 89.9433 50 0.97 33
IV.BSSO.HHE. 2020-08-23T11:36:37.02 0.6 undecidable manual S 322 50.2164 50 0.69 40
IV.SGRT.HHE. 2020-08-23T11:36:35.12 0.6 undecidable manual P 46 89.9433 50 -0.6 39
IX.LIO3.HHZ.02 2020-08-23T11:36:33.01 0.6 undecidable manual S 151 37.1295 50 0.16 48
IV.APRC.HHZ. 2020-08-23T11:36:33.99 0.6 undecidable manual P 37 79.0653 50 -0.05 45
IV.SNAL.HHZ. 2020-08-23T11:36:32.73 0.3 undecidable manual S 145 35.742 50 0.26 70
IV.SGTA.HNE. 2020-08-23T11:36:32.13 0.6 undecidable manual S 100 33.8439 50 0.16 48
IV.CAFE.HHZ. 2020-08-23T11:36:31.11 0.3 undecidable manual S 129 28.8489 50 0.46 68
IV.VITU.HNZ. 2020-08-23T11:36:30.45 0.6 undecidable manual S 268 28.0497 50 0.02 50
IV.MELA.HHZ. 2020-08-23T11:36:30.27 0.3 undecidable manual P 13 58.6968 50 -0.63 61
IV.BSSO.HHE. 2020-08-23T11:36:29.45 0.3 undecidable manual P 322 50.2164 50 -0.14 70
IX.LIO3.HHZ.02 2020-08-23T11:36:27.16 0.3 undecidable manual P 151 37.1295 50 -0.42 68
IV.SGTA.HNE. 2020-08-23T11:36:27.03 0.1 undecidable manual P 100 33.8439 50 -0.04 98
IV.VITU.HNZ. 2020-08-23T11:36:26.07 0.3 undecidable manual P 268 28.0497 50 -0.12 73
IV.PSB1.HHZ. 2020-08-23T11:36:26.72 0.6 undecidable manual S 286 13.4754 128 0.36 48
IV.SNAL.HHZ. 2020-08-23T11:36:26.77 0.1 undecidable manual P 145 35.742 50 -0.59 86
IV.SACR.HNN. 2020-08-23T11:36:26.90 0.3 undecidable manual P 317 31.6461 50 0.17 72
IV.CAFE.HHZ. 2020-08-23T11:36:26.21 0.3 undecidable manual P 129 28.8489 50 -0.1 74
IV.MRB1.HHZ. 2020-08-23T11:36:25.01 0.6 undecidable manual S 179 7.4814 145 0.09 51
IV.MRB1.HHZ. 2020-08-23T11:36:23.26 0.1 undecidable manual P 179 7.4814 145 0.26 98
IV.PSB1.HHZ. 2020-08-23T11:36:23.70 0.1 undecidable manual P 286 13.4754 128 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PSB1.HNN. ML:1.0 0.00009579152 1.0528 AML other m 2020-08-23T11:36:26.85
IV.PSB1.HHN. ML:0.9 0.00007799986 0.2432 AML other m 2020-08-23T11:36:26.86
IV.PSB1.HHE. ML:0.8 0.00006518888000000001 1.8592 AML other m 2020-08-23T11:36:27.05
IV.PSB1.HNE. ML:1.1 0.00011843206 0.6208 AML other m 2020-08-23T11:36:27.48
IV.SNAL.HNN. ML:1.1 0.000042623745000000006 0.8032 AML other m 2020-08-23T11:36:28.94
IV.MRB1.HHE. ML:1.3 0.00025887495 1.6032 AML other m 2020-08-23T11:36:29.86
IV.MRB1.HNE. ML:1.3 0.0002532857 1.1936 AML other m 2020-08-23T11:36:30.33
IV.MRB1.HHN. ML:1.3 0.0002947167 0.48 AML other m 2020-08-23T11:36:30.28
IV.MRB1.HNN. ML:1.3 0.0002765746 0.4992 AML other m 2020-08-23T11:36:30.30
IV.CAFE.HHN. ML:0.6 0.000021076480000000003 1.3984 AML other m 2020-08-23T11:36:32.09
IV.SNAL.HHE. ML:1.0 0.000034554775 0.5216 AML other m 2020-08-23T11:36:32.01
IV.CAFE.HNN. ML:1.5 0.0001452608 0.688 AML other m 2020-08-23T11:36:34.56
IV.SNAL.HNE. ML:1.2 0.00005423348 0.0992 AML other m 2020-08-23T11:36:36.41
IV.CAFE.HHE. ML:0.7 0.000027459155 0.2176 AML other m 2020-08-23T11:36:39.30
IV.CAFE.HNE. ML:1.6 0.00019029580000000002 0.7648 AML other m 2020-08-23T11:36:40.88
IV.SNAL.HHN. ML:1.0 0.000034323375 1.664 AML other m 2020-08-23T11:36:41.93
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