Earthquake with magnitude of ML 1.5 on date 20-10-2021 and time 11:30:41 (Italy) in region 2 km NW San Gregorio Magno (SA)

A magnitude ML 1.5 earthquake occured in region: 2 km NW San Gregorio Magno (SA), on

  • 20-10-2021 09:30:41 (UTC)
  • 20-10-2021 11:30:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.676, 15.391 at 8 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
San Gregorio Magno SA 2 4286 4286
Buccino SA 5 5047 9333
Romagnano al Monte SA 7 368 9701
Ricigliano SA 8 1144 10845
Palomonte SA 9 3985 14830
Colliano SA 10 3638 18468
Balvano PZ 11 1830 20298
Salvitelle SA 11 560 20858
Muro Lucano PZ 12 5497 26355
Valva SA 12 1643 27998
Castelgrande PZ 13 943 28941
Contursi Terme SA 13 3394 32335
Vietri di Potenza PZ 13 2832 35167
Oliveto Citra SA 13 3802 38969
Auletta SA 13 2336 41305
Laviano SA 14 1438 42743
Sicignano degli Alburni SA 15 3519 46262
Caggiano SA 15 2765 49027
Bella PZ 16 5171 54198
Pertosa SA 16 690 54888
Santomenna SA 16 443 55331
Petina SA 16 1159 56490
Castelnuovo di Conza SA 17 619 57109
Baragiano PZ 17 2671 59780
Senerchia AV 17 842 60622
Pescopagano PZ 18 1910 62532
Savoia di Lucania PZ 18 1127 63659
Calabritto AV 19 2391 66050
Postiglione SA 19 2151 68201
Sant'Andrea di Conza AV 19 1539 69740
Polla SA 20 5279 75019

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Battipaglia (50786 inhabitants)
35 Km W of Potenza (67122 inhabitants)
53 Km E of Salerno (135261 inhabitants)
57 Km E of Avellino (54857 inhabitants)
58 Km E of Cava de' Tirreni (53659 inhabitants)
72 Km SE of Benevento (60091 inhabitants)
73 Km E of Scafati (50787 inhabitants)
77 Km E of Castellammare di Stabia (66466 inhabitants)
79 Km SW of Cerignola (58396 inhabitants)
87 Km E of Torre del Greco (86275 inhabitants)
88 Km S of Foggia (151991 inhabitants)
89 Km E of Portici (55274 inhabitants)
89 Km E of Ercolano (53709 inhabitants)
91 Km E of Acerra (59573 inhabitants)
95 Km E of Afragola (65057 inhabitants)
96 Km E of Casoria (77642 inhabitants)
98 Km SW of Andria (100440 inhabitants)
98 Km E of Napoli (974074 inhabitants)
99 Km W of Altamura (70396 inhabitants)
99 Km E of Caserta (76326 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
ML 1.5 2021-10-20
09:30:41
40.6765 15.3908 8 2021-10-20
09:51:10
Sala Sismica INGV-Roma 96796791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 09:30:41 ± 0.19
Latitude 40.6765 ± 0.0045
Longitude 15.3908 ± 0.0083
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96796791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 718
Semi-minor axis of confidence ellipse (meter) 105
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 86
Circular confidence region, given by single value of horizontal uncertainty (meter) 720
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.28419
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 96796791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 09:51:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.TRI.HHZ. 2021-10-20T09:32:26.53 3.0 undecidable manual Sn -3.41 0
IV.SENA.HHZ. 2021-10-20T09:32:21.92 3.0 undecidable manual Sn -6.65 0
IV.ISPIC.EHZ. 2021-10-20T09:32:19.10 3.0 undecidable manual Sn -8.78 0
IV.ERC.EHZ. 2021-10-20T09:32:12.23 3.0 undecidable manual Sn 0.09 0
IV.BAG8.EHZ. 2021-10-20T09:32:11.61 3.0 positive manual Pg 17.690001 0
IV.SOI.EHZ. 2021-10-20T09:32:08.36 3.0 undecidable manual Sg 11.17 0
GU.GORR.HHZ. 2021-10-20T09:32:07.56 3.0 undecidable manual Pg 16.6 0
IV.FERC.HHZ.00 2021-10-20T09:31:59.58 3.0 undecidable manual Sg 11.22 0
IV.ECTS.HHZ. 2021-10-20T09:31:55.55 3.0 undecidable manual Sn -5.15 0
IV.ISPIC.EHZ. 2021-10-20T09:31:48.50 3.0 undecidable manual Pg 11.79 0
IV.MTL1.HNZ. 2021-10-20T09:31:40.86 3.0 undecidable manual Sn -1.11 0
IV.FIR.HHZ. 2021-10-20T09:31:39.14 3.0 undecidable manual Pg 10.51 0
IV.GAVE.EHZ. 2021-10-20T09:31:35.89 3.0 undecidable manual Sg 1.84 0
IT.FIE.HGZ. 2021-10-20T09:31:34.20 3.0 positive manual Pg 5.59 0
IV.ROM9.HNZ. 2021-10-20T09:31:31.98 3.0 undecidable manual Sn 0.96 0
IV.IMOL.HNZ. 2021-10-20T09:31:31.25 3.0 negative manual Pn 0.6 0
IV.LAV9.HHZ. 2021-10-20T09:31:22.19 3.0 undecidable manual Sn -4.76 0
IV.CAR1.HHZ. 2021-10-20T09:31:11.83 3.0 negative manual Pg 7.69 0
IV.POFI.HHZ. 2021-10-20T09:31:08.22 3.0 undecidable manual Sg -1.09 0
IT.PLTA.HNZ. 2021-10-20T09:30:53.33 3.0 undecidable manual Sn -2.54 0
IV.SNAL.HHZ. 2021-10-20T09:30:52.91 0.6 undecidable manual S 331 0.2842 104 0.47 44
IV.SCHR.EHZ. 2021-10-20T09:30:51.50 3.0 positive manual Pn -0.14 0
IX.CLT3.EHE.02 2021-10-20T09:30:50.62 0.6 undecidable manual S 3 0.2266 107 0.32 46
IX.SRN3.HHZ.02 2021-10-20T09:30:49.24 1.0 undecidable manual S 165 0.197 109 0.03 25
IV.CMPR.HHZ. 2021-10-20T09:30:48.95 3.0 undecidable manual Pg 0.95 0
IV.SGO.HHZ. 2021-10-20T09:30:47.28 0.6 undecidable manual S 209 0.1322 117 0.37 47
IX.NSC3.EHZ. 2021-10-20T09:30:47.07 0.1 undecidable manual P 310 0.2653 104 -0.2 95
IX.RDM3.HNZ.02 2021-10-20T09:30:47.02 1.0 undecidable manual P 29 0.2275 107 0.56 22
IV.SNAL.HHZ. 2021-10-20T09:30:47.63 0.1 undecidable manual P 331 0.2842 104 -0.05 97
IX.BEL3.HNE.01 2021-10-20T09:30:46.52 1.0 undecidable manual P 78 0.1907 110 0.84 20
IX.CLT3.EHE.02 2021-10-20T09:30:46.88 0.6 undecidable manual P 3 0.2266 107 0.44 45
IV.MRLC.HHZ. 2021-10-20T09:30:46.45 0.6 undecidable manual S 43 0.1088 122 0.31 48
IX.CGG3.HNE. 2021-10-20T09:30:45.69 0.1 undecidable manual P 143 0.1673 112 0.49 91
IX.SRN3.HHZ.02 2021-10-20T09:30:45.61 0.3 positive manual P 165 0.197 109 -0.2 72
IV.MCRV.HHZ. 2021-10-20T09:30:45.66 1.0 undecidable manual P 302 0.1988 109 -0.2 24
IX.SNR3.EHZ.02 2021-10-20T09:30:45.05 1.0 positive manual P 292 0.161 113 -0.02 25
IV.SGO.HHZ. 2021-10-20T09:30:44.43 0.1 positive manual P 209 0.1322 117 -0.05 100
IX.COL3.HHZ.02 2021-10-20T09:30:44.67 0.3 undecidable manual S 283 0.0468 146 0.29 73
IV.MRLC.HHZ. 2021-10-20T09:30:43.69 0.3 undecidable manual P 43 0.1088 122 -0.35 71
IV.MSAG.HHZ. 2021-10-20T09:30:43.47 3.0 negative manual Pn -0.17 0
IX.SCL3.EHZ.02 2021-10-20T09:30:43.38 0.1 positive manual P 78 0.0935 126 -0.37 94
IV.SGRT.HHZ. 2021-10-20T09:30:43.74 3.0 positive manual Pg 0.73 0
IX.COL3.HHZ.02 2021-10-20T09:30:42.45 0.3 undecidable manual P 283 0.0468 146 -0.57 67
OT.OT12.EHZ. 2021-10-20T09:30:42.30 3.0 negative manual Pn -0.61 0
IX.VDS3.HNE. 2021-10-20T09:30:42.95 0.1 undecidable manual P 23 0.0701 134 -0.4 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT12.EHN. ML:2 9.04E-5 0.24 AML other m 2021-10-20T09:30:44.37
IX.COL3.HHN.02 ML:2.4 0.004 1.14 AML other m 2021-10-20T09:30:44.87
IX.COL3.HHE.02 ML:2.6 0.00587 0.22 AML other m 2021-10-20T09:30:45.16
OT.OT12.EHE. ML:1.9 5.91E-5 0.28 AML other m 2021-10-20T09:30:45.23
IV.SGRT.HHE. ML:2.2 0.000127 1.54 AML other m 2021-10-20T09:30:46.02
IV.SGRT.HHN. ML:2.3 0.0001415 0.16 AML other m 2021-10-20T09:30:46.85
IV.MSAG.HHE. ML:1.4 2.005E-5 0.22 AML other m 2021-10-20T09:30:47.19
IV.SGO.HHN. ML:1.4 0.0002345 1 AML other m 2021-10-20T09:30:47.18
IX.SCL3.EHE.02 ML:2.2 0.002145 1.16 AML other m 2021-10-20T09:30:47.76
IV.MRLC.HNE. ML:1.3 0.0002325 0.22 AML other m 2021-10-20T09:30:47.73
IV.MRLC.HHE. ML:1.6 0.0004965 0.24 AML other m 2021-10-20T09:30:47.72
IV.MRLC.HNN. ML:1.4 0.0003255 1.44 AML other m 2021-10-20T09:30:48.91
IV.MRLC.HHN. ML:1.7 0.0006825 1.44 AML other m 2021-10-20T09:30:48.91
IV.SGO.HHE. ML:1.3 0.000217 0.24 AML other m 2021-10-20T09:30:48.07
IX.SCL3.EHN.02 ML:2.2 0.0025 0.48 AML other m 2021-10-20T09:30:48.90
IV.MSAG.HHN. ML:1.7 3.445E-5 0.48 AML other m 2021-10-20T09:30:50.34
IV.MCRV.HHN. ML:1.6 0.000296 0.84 AML other m 2021-10-20T09:30:50.45
IV.MCRV.HHE. ML:1.2 0.0001265 0.82 AML other m 2021-10-20T09:30:51.72
IX.SRN3.HHE.02 ML:1.8 0.0004225 0.52 AML other m 2021-10-20T09:30:51.84
IX.NSC3.EHE.02 ML:1.3 9.87E-5 0.36 AML other m 2021-10-20T09:30:54.01
IX.NSC3.EHN.02 ML:1.4 0.000133 1.12 AML other m 2021-10-20T09:30:54.11
IX.SNR3.EHN.02 ML:1.6 0.000372 0.36 AML other m 2021-10-20T09:30:54.77
IX.SRN3.HHN.02 ML:1.8 0.0004035 0.38 AML other m 2021-10-20T09:30:55.54
IX.SNR3.EHE.02 ML:1.6 0.000321 0.3 AML other m 2021-10-20T09:30:55.75
IV.CMPR.HHE. ML:0.9 3.14E-5 1.42 AML other m 2021-10-20T09:31:00.26
IV.SNAL.HHN. ML:1.5 0.000154 0.78 AML other m 2021-10-20T09:31:00.94
IV.SNAL.HHE. ML:1.5 0.0001395 0.58 AML other m 2021-10-20T09:31:02.46
IV.CMPR.HHN. ML:0.9 3.015E-5 1.44 AML other m 2021-10-20T09:31:02.15
IV.GAVE.EHN. ML:2.8 7.015E-5 0.4 AML other m 2021-10-20T09:31:36.42
IV.GAVE.EHE. ML:2.5 4.155E-5 0.08 AML other m 2021-10-20T09:31:40.02
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