Earthquake with magnitude of ML 1.7 on date 20-09-2021 and time 15:09:09 (Italy) in region 2 km W Caposele (AV)

A magnitude ML 1.7 earthquake occured in region: 2 km W Caposele (AV), on

  • 20-09-2021 13:09:09 (UTC)
  • 20-09-2021 15:09:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.807, 15.202 at 14 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
Caposele AV 2 3483 3483
Calabritto AV 3 2391 5874
Teora AV 7 1537 7411
Senerchia AV 7 842 8253
Lioni AV 8 6201 14454
Laviano SA 9 1438 15892
Valva SA 9 1643 17535
Santomenna SA 10 443 17978
Castelnuovo di Conza SA 10 619 18597
Bagnoli Irpino AV 12 3217 21814
Colliano SA 12 3638 25452
Conza della Campania AV 13 1373 26825
Oliveto Citra SA 13 3802 30627
Nusco AV 13 4203 34830
Morra De Sanctis AV 14 1297 36127
Sant'Angelo dei Lombardi AV 14 4250 40377
Acerno SA 14 2783 43160
Sant'Andrea di Conza AV 15 1539 44699
Montella AV 16 7780 52479
Cassano Irpino AV 16 982 53461
Rocca San Felice AV 16 851 54312
Guardia Lombardi AV 17 1718 56030
Torella dei Lombardi AV 17 2144 58174
Pescopagano PZ 17 1910 60084
Andretta AV 17 1927 62011
Cairano AV 17 326 62337
Campagna SA 18 16703 79040
Contursi Terme SA 18 3394 82434
Palomonte SA 18 3985 86419
Castelfranci AV 19 2041 88460
Castelgrande PZ 20 943 89403

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Battipaglia (50786 inhabitants)
36 Km E of Avellino (54857 inhabitants)
40 Km E of Salerno (135261 inhabitants)
43 Km E of Cava de' Tirreni (53659 inhabitants)
50 Km SE of Benevento (60091 inhabitants)
54 Km W of Potenza (67122 inhabitants)
57 Km E of Scafati (50787 inhabitants)
62 Km E of Castellammare di Stabia (66466 inhabitants)
70 Km E of Torre del Greco (86275 inhabitants)
71 Km E of Portici (55274 inhabitants)
72 Km E of Acerra (59573 inhabitants)
72 Km E of Ercolano (53709 inhabitants)
76 Km E of Afragola (65057 inhabitants)
77 Km E of Casoria (77642 inhabitants)
78 Km SW of Cerignola (58396 inhabitants)
78 Km SW of Foggia (151991 inhabitants)
79 Km E of Caserta (76326 inhabitants)
80 Km E of Napoli (974074 inhabitants)
85 Km E of Giugliano in Campania (122974 inhabitants)
86 Km E of Marano di Napoli (59874 inhabitants)
86 Km E of Aversa (53047 inhabitants)
94 Km E of Pozzuoli (81661 inhabitants)
99 Km S of San Severo (53905 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 1.7 2021-09-20
13:09:09
40.8068 15.2022 14 2021-09-20
13:20:49
Sala Sismica INGV-Roma 95664331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 13:09:09 ± 0.17
Latitude 40.8068 ± 0.0036
Longitude 15.2022 ± 0.0107
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95664331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 900
Semi-minor axis of confidence ellipse (meter) 40
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 102
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.18076
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 95664331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 13:20:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.CMP3.HNN.02 2021-09-20T13:09:17.77 0.6 undecidable manual S 211 0.1808 110 0.22 48
IX.MNT3.EHZ.02 2021-09-20T13:09:16.90 0.6 undecidable manual S 282 0.1511 116 0.16 48
IX.SALI.HNZ.01 2021-09-20T13:09:16.51 0.6 undecidable manual S 352 0.1241 124 0.45 45
IV.SNAL.HHZ. 2021-09-20T13:09:16.00 0.6 undecidable manual S 3 0.1187 126 0.08 49
IX.SNR3.EHZ.02 2021-09-20T13:09:15.20 0.6 undecidable manual S 186 0.071 144 0.27 48
IV.MCRV.HHZ. 2021-09-20T13:09:14.10 0.6 undecidable manual S 227 0.0351 161 -0.33 47
IX.NSC3.EHZ.02 2021-09-20T13:09:14.80 0.6 undecidable manual S 303 0.0728 143 -0.14 49
IX.CMP3.HNN.02 2021-09-20T13:09:14.17 0.1 undecidable manual P 211 0.1808 110 -0.01 98
IV.SNAL.HHZ. 2021-09-20T13:09:13.14 1.0 negative manual P 3 0.1187 126 -0.1 25
IX.MNT3.EHZ.02 2021-09-20T13:09:13.69 0.1 negative manual P 282 0.1511 116 -0.03 99
IX.SALI.HNZ.01 2021-09-20T13:09:13.25 0.1 undecidable manual P 352 0.1241 124 -0.07 99
IV.MCRV.HHZ. 2021-09-20T13:09:12.32 0.1 negative manual P 227 0.0351 161 -0.06 100
IX.NSC3.EHZ.02 2021-09-20T13:09:12.53 0.1 negative manual P 303 0.0728 143 -0.15 98
IX.SNR3.EHZ.02 2021-09-20T13:09:12.73 0.3 negative manual P 186 0.071 144 0.06 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCRV.HHE. ML:1.6 0.0004425 1.2 AML other m 2021-09-20T13:09:14.15
IX.NSC3.EHE.02 ML:1.6 0.0004175 0.78 AML other m 2021-09-20T13:09:15.17
IX.NSC3.EHN.02 ML:1.7 0.000507 0.1 AML other m 2021-09-20T13:09:15.73
IV.MCRV.HHN. ML:2 0.001235 1 AML other m 2021-09-20T13:09:15.68
IX.SNR3.EHN.02 ML:1.9 0.000841 1.36 AML other m 2021-09-20T13:09:15.24
IV.SNAL.HNN. ML:1.4 0.0002425 0.86 AML other m 2021-09-20T13:09:16.68
IX.SNR3.EHE.02 ML:1.7 0.0006115 1.68 AML other m 2021-09-20T13:09:16.91
IV.SNAL.HNE. ML:1.4 0.000224 1.5 AML other m 2021-09-20T13:09:17.91
IX.MNT3.EHE.02 ML:1.6 0.000291 1.04 AML other m 2021-09-20T13:09:17.91
IX.MNT3.EHN.02 ML:1.9 0.0005595 0.1 AML other m 2021-09-20T13:09:17.69
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