Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 28-07-2021 and time 21:45:20 (UTC) in region 1 km NW Bagnoli Irpino (AV)

A magnitude ML 0.7 earthquake occured in region: 1 km NW Bagnoli Irpino (AV), on

  • 28-07-2021 21:45:20 (UTC)
  • 28-07-2021 23:45:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.8450, 15.0620 at 9 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
Bagnoli Irpino AV 2 3217 3217
Montella AV 4 7780 10997
Cassano Irpino AV 4 982 11979
Nusco AV 5 4203 16182
Castelfranci AV 10 2041 18223
Montemarano AV 10 2851 21074
Lioni AV 11 6201 27275
Castelvetere sul Calore AV 11 1615 28890
Torella dei Lombardi AV 12 2144 31034
Acerno SA 12 2783 33817
Volturara Irpina AV 13 3289 37106
Sant'Angelo dei Lombardi AV 13 4250 41356
Caposele AV 14 3483 44839
Villamaina AV 14 995 45834
Paternopoli AV 15 2384 48218
Rocca San Felice AV 15 851 49069
San Mango sul Calore AV 15 1185 50254
Calabritto AV 15 2391 52645
Chiusano di San Domenico AV 16 2277 54922
Serino AV 16 7034 61956
Teora AV 16 1537 63493
Santa Lucia di Serino AV 16 1402 64895
Salza Irpina AV 17 772 65667
Senerchia AV 17 842 66509
Sorbo Serpico AV 17 583 67092
Luogosano AV 17 1187 68279
Giffoni Valle Piana SA 17 12001 80280
Santo Stefano del Sole AV 17 2208 82488
Guardia Lombardi AV 17 1718 84206
San Michele di Serino AV 18 2530 86736
Morra De Sanctis AV 18 1297 88033
Parolise AV 18 663 88696
Montecorvino Rovella SA 18 12739 101435
Solofra AV 18 12495 113930
Gesualdo AV 18 3516 117446
Lapio AV 18 1572 119018
San Potito Ultra AV 19 1558 120576
Frigento AV 19 3780 124356
Sant'Angelo all'Esca AV 19 801 125157
Candida AV 19 1147 126304
Giffoni Sei Casali SA 19 5264 131568
Montefalcione AV 20 3359 134927
Fontanarosa AV 20 3170 138097

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Avellino (54857 inhabitants)
27 Km N of Battipaglia (50786 inhabitants)
31 Km NE of Salerno (135261 inhabitants)
34 Km E of Cava de' Tirreni (53659 inhabitants)
40 Km SE of Benevento (60091 inhabitants)
46 Km E of Scafati (50787 inhabitants)
52 Km E of Castellammare di Stabia (66466 inhabitants)
59 Km E of Torre del Greco (86275 inhabitants)
59 Km E of Acerra (59573 inhabitants)
60 Km E of Portici (55274 inhabitants)
60 Km E of Ercolano (53709 inhabitants)
64 Km E of Afragola (65057 inhabitants)
65 Km E of Casoria (77642 inhabitants)
66 Km E of Caserta (76326 inhabitants)
67 Km W of Potenza (67122 inhabitants)
68 Km E of Napoli (974074 inhabitants)
73 Km E of Giugliano in Campania (122974 inhabitants)
73 Km E of Aversa (53047 inhabitants)
74 Km E of Marano di Napoli (59874 inhabitants)
80 Km SW of Foggia (151991 inhabitants)
82 Km E of Pozzuoli (81661 inhabitants)
85 Km SW of Cerignola (58396 inhabitants)
97 Km S of San Severo (53905 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 0.7 2021-07-28
21:45:20		 40.8452 15.062 9 2021-12-29
11:12:51		 Bollettino Sismico Italiano INGV 97366161
Reviewed
Rev100 		ML 0.5 2021-07-28
21:45:22		 40.8577 15.1198 5 2021-07-28
21:58:35		 Sala Sismica INGV-Roma 93321891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-28 21:45:20 ± 0.48
Latitude 40.8452 ± 0.0090
Longitude 15.0620 ± 0.0369
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97366161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2965
Semi-minor axis of confidence ellipse (meter) 970
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 2960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 276
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.14749
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 93321891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-28 21:58:35

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 97366161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-09 17:31:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SNR3.EHZ.02 2021-07-28T21:45:27.55 0.6 undecidable manual S 138 16.3725 118 0.37 47
IV.SNAL.HHZ. 2021-07-28T21:45:26.96 0.6 undecidable manual S 54 15.1737 120 0.14 49
IV.MCRV.HHZ. 2021-07-28T21:45:25.13 0.6 undecidable manual S 128 11.2776 128 -0.57 44
IV.SNAL.HHZ. 2021-07-28T21:45:24.29 0.1 undecidable manual P 54 15.1737 120 0.05 100
IX.NSC3.EHZ.02 2021-07-28T21:45:24.45 0.6 undecidable manual S 88 5.0949 150 0.2 49
IX.SNR3.EHZ.02 2021-07-28T21:45:24.90 0.6 undecidable manual P 138 16.3725 118 0.45 46
IX.LIO3.HHZ.02 2021-07-28T21:45:23.39 0.3 undecidable manual P 60 11.4774 128 -0.23 73
IV.MCRV.HHZ. 2021-07-28T21:45:23.31 0.3 undecidable manual P 128 11.2776 128 -0.28 72
IX.NSC3.EHZ.02 2021-07-28T21:45:22.80 0.3 undecidable manual P 88 5.0949 150 0.04 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.NSC3.EHE.02 ML:0.6 0.00007815 0.14 AML other m 2021-07-28T21:45:24.75
IX.NSC3.EHN.02 ML:0.8 0.00010600000000000002 0.1 AML other m 2021-07-28T21:45:24.85
IV.MCRV.HHN. ML:0.8 0.0000765 0.76 AML other m 2021-07-28T21:45:25.23
IV.MCRV.HHE. ML:0.4 0.0000315 0.1 AML other m 2021-07-28T21:45:25.83
IX.SNR3.EHN.02 ML:0.8 0.00005475 0.36 AML other m 2021-07-28T21:45:28.58
IX.SNR3.EHE.02 ML:0.6 0.00004125 0.32 AML other m 2021-07-28T21:45:28.94
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