Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 26-08-2021 and time 21:22:50 (Italy) in region 3 km N Palomonte (SA)

A magnitude ML 1.7 earthquake occured in region: 3 km N Palomonte (SA), on

  • 26-08-2021 19:22:50 (UTC)
  • 26-08-2021 21:22:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6920, 15.3000 at 5 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
Palomonte SA 4 3985 3985
Colliano SA 4 3638 7623
Oliveto Citra SA 5 3802 11425
Valva SA 6 1643 13068
Contursi Terme SA 7 3394 16462
Buccino SA 9 5047 21509
San Gregorio Magno SA 9 4286 25795
Senerchia AV 10 842 26637
Laviano SA 10 1438 28075
Calabritto AV 12 2391 30466
Santomenna SA 13 443 30909
Romagnano al Monte SA 13 368 31277
Castelnuovo di Conza SA 14 619 31896
Sicignano degli Alburni SA 15 3519 35415
Caposele AV 15 3483 38898
Castelgrande PZ 15 943 39841
Serre SA 15 3995 43836
Ricigliano SA 16 1144 44980
Postiglione SA 16 2151 47131
Campagna SA 17 16703 63834
Muro Lucano PZ 17 5497 69331
Salvitelle SA 17 560 69891
Sant'Andrea di Conza AV 18 1539 71430
Auletta SA 18 2336 73766
Pescopagano PZ 18 1910 75676
Teora AV 18 1537 77213
Balvano PZ 18 1830 79043
Petina SA 19 1159 80202
Conza della Campania AV 19 1373 81575

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Battipaglia (50786 inhabitants)
43 Km W of Potenza (67122 inhabitants)
46 Km E of Salerno (135261 inhabitants)
49 Km SE of Avellino (54857 inhabitants)
50 Km E of Cava de' Tirreni (53659 inhabitants)
65 Km SE of Benevento (60091 inhabitants)
66 Km E of Scafati (50787 inhabitants)
69 Km E of Castellammare di Stabia (66466 inhabitants)
79 Km E of Torre del Greco (86275 inhabitants)
81 Km E of Portici (55274 inhabitants)
81 Km E of Ercolano (53709 inhabitants)
82 Km SW of Cerignola (58396 inhabitants)
83 Km E of Acerra (59573 inhabitants)
87 Km E of Afragola (65057 inhabitants)
88 Km S of Foggia (151991 inhabitants)
88 Km E of Casoria (77642 inhabitants)
90 Km E of Napoli (974074 inhabitants)
92 Km E of Caserta (76326 inhabitants)
96 Km E of Giugliano in Campania (122974 inhabitants)
96 Km E of Marano di Napoli (59874 inhabitants)
97 Km E of Aversa (53047 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 1.7 2021-08-26
19:22:50		 40.6918 15.3005 5 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 97943681
Reviewed
Rev100 		ML 1.7 2021-08-26
19:22:50		 40.6968 15.3047 4 2021-08-26
19:39:32		 Sala Sismica INGV-Roma 94675911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-26 19:22:50 ± 0.11
Latitude 40.6918 ± 0.0036
Longitude 15.3005 ± 0.0059
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97943681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 60
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
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) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.49553
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 97943681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-29 14:34:04

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 94675911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-26 19:39:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SALI.HNZ.01 2021-08-26T19:23:01.33 0.6 undecidable manual S 339 28.2495 101 0.77 40
IV.SNAL.HNN. 2021-08-26T19:23:00.44 0.6 undecidable manual S 344 27.0507 101 0.31 46
IX.SRN3.HHZ.02 2021-08-26T19:23:00.32 0.6 undecidable manual S 150 26.4513 102 0.4 45
IV.ACER.HHZ. 2021-08-26T19:23:00.80 0.3 undecidable manual P 79 55.0005 50 -0.4 64
IX.CLT3.HNN.02 2021-08-26T19:23:00.56 0.6 undecidable manual S 20 24.9528 102 1.12 34
IX.NSC3.EHZ.02 2021-08-26T19:22:59.01 0.6 undecidable manual S 319 22.755 103 0.31 46
IV.CDRU.HHZ. 2021-08-26T19:22:58.68 0.6 undecidable manual S 179 22.4553 103 0.1 48
IX.CMP3.EHN.02 2021-08-26T19:22:58.22 0.6 undecidable manual S 257 19.0698 106 0.78 40
IV.MRLC.HHZ. 2021-08-26T19:22:57.20 0.6 undecidable manual S 66 17.3715 107 0.32 47
IX.PST3.HNZ.01 2021-08-26T19:22:56.67 0.6 undecidable manual S 198 15.2736 109 0.47 45
IX.RDM3.HHE.02 2021-08-26T19:22:56.72 0.3 undecidable manual P 44 28.3494 101 0.36 68
IX.MNT3.EHN.02 2021-08-26T19:22:56.05 0.3 undecidable manual P 303 29.4483 100 -0.52 65
IX.SALI.HNZ.01 2021-08-26T19:22:56.26 0.3 undecidable manual P 339 28.2495 101 -0.08 72
IX.CLT3.HNN.02 2021-08-26T19:22:55.73 0.3 undecidable manual P 20 24.9528 102 0.04 73
IV.SGO.HNN. 2021-08-26T19:22:55.77 0.6 undecidable manual S 178 14.5743 110 -0.2 48
IX.CGG3.HNZ.01 2021-08-26T19:22:55.94 0.3 undecidable manual P 132 25.0527 102 0.24 70
IV.SNAL.HNN. 2021-08-26T19:22:55.82 0.1 undecidable manual P 344 27.0507 101 -0.27 93
IX.VDS3.HNZ.01 2021-08-26T19:22:55.39 0.6 undecidable manual S 63 11.9769 114 0.28 48
IX.AND3.HHE.02 2021-08-26T19:22:55.89 0.3 undecidable manual P 6 26.5512 101 -0.1 72
IX.SRN3.HHZ.02 2021-08-26T19:22:55.99 0.3 undecidable manual P 150 26.4513 102 0.02 73
IX.CMP3.EHN.02 2021-08-26T19:22:54.43 0.1 undecidable manual P 257 19.0698 106 -0.11 97
IX.SNR3.EHZ.02 2021-08-26T19:22:54.68 0.6 undecidable manual S 298 10.2786 118 0.08 50
IX.PST3.HNZ.01 2021-08-26T19:22:54.52 0.3 undecidable manual P 198 15.2736 109 0.7 62
IX.NSC3.EHZ.02 2021-08-26T19:22:54.84 0.1 undecidable manual P 319 22.755 103 -0.42 90
IV.MRLC.HHZ. 2021-08-26T19:22:54.01 0.1 undecidable manual P 66 17.3715 107 -0.21 95
IV.CDRU.HHZ. 2021-08-26T19:22:54.88 0.1 undecidable manual P 179 22.4553 103 -0.31 93
IV.MCRV.HHZ. 2021-08-26T19:22:53.36 0.3 undecidable manual P 312 14.9739 110 -0.4 69
IV.SGO.HNN. 2021-08-26T19:22:53.74 0.1 undecidable manual P 178 14.5743 110 0.05 99
IX.VDS3.HNZ.01 2021-08-26T19:22:53.19 0.3 undecidable manual P 63 11.9769 114 -0.01 75
IX.SNR3.EHZ.02 2021-08-26T19:22:52.94 0.1 undecidable manual P 298 10.2786 118 0.04 100
IX.COL3.HNE.02 2021-08-26T19:22:52.01 0.6 undecidable manual S 102 2.5974 154 -0.63 44
IX.COL3.HNE.02 2021-08-26T19:22:51.34 0.1 undecidable manual P 102 2.5974 154 -0.42 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.SNR3.EHE.02 ML:1.8 0.0009325 0.68 AML other m 2021-08-26T19:22:57.35
IX.SNR3.HNE.01 ML:1.8 0.0010145 0.68 AML other m 2021-08-26T19:22:57.35
IX.SNR3.EHN.02 ML:2.1 0.0020499999999999997 0.38 AML other m 2021-08-26T19:22:58.78
IX.SNR3.HNN.01 ML:2.1 0.002185 0.38 AML other m 2021-08-26T19:22:58.78
IV.CDRU.HHE. ML:1.5 0.000217 0.6 AML other m 2021-08-26T19:22:59.57
IV.MCRV.HHE. ML:1.5 0.000314 0.5 AML other m 2021-08-26T19:22:59.39
IV.MCRV.HHN. ML:1.7 0.0005635 0.58 AML other m 2021-08-26T19:23:00.62
IV.CDRU.HHN. ML:1.3 0.00014950000000000003 1.24 AML other m 2021-08-26T19:23:01.30
IV.MRLC.HNN. ML:1.6 0.00033299999999999996 0.68 AML other m 2021-08-26T19:23:02.15
IV.MRLC.HHN. ML:1.8 0.0006855 0.68 AML other m 2021-08-26T19:23:02.15
IX.SRN3.HHE.02 ML:1.9 0.000423 0.34 AML other m 2021-08-26T19:23:02.75
IV.MRLC.HHE. ML:1.7 0.000444 0.64 AML other m 2021-08-26T19:23:02.67
IV.MRLC.HNE. ML:1.3 0.00020500000000000002 0.62 AML other m 2021-08-26T19:23:02.36
IX.SRN3.HHN.02 ML:2.0 0.0006544999999999999 0.56 AML other m 2021-08-26T19:23:03.62
IV.ACER.HHN. ML:1.6 0.00010469999999999998 0.96 AML other m 2021-08-26T19:23:14.84
IV.ACER.HHE. ML:1.6 0.0000838 0.48 AML other m 2021-08-26T19:23:20.61
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