Earthquake with magnitude of ML 0.5 on date 28-07-2021 and time 23:45:22 (Italy) in region 4 km SE Nusco (AV)

A magnitude ML 0.5 earthquake occured in region: 4 km SE Nusco (AV), on

  • 28-07-2021 21:45:22 (UTC)
  • 28-07-2021 23:45:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.858, 15.12 at 5 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
Nusco AV 4 4203 4203
Bagnoli Irpino AV 5 3217 7420
Lioni AV 6 6201 13621
Cassano Irpino AV 8 982 14603
Montella AV 9 7780 22383
Sant'Angelo dei Lombardi AV 9 4250 26633
Torella dei Lombardi AV 10 2144 28777
Caposele AV 10 3483 32260
Castelfranci AV 11 2041 34301
Rocca San Felice AV 11 851 35152
Teora AV 11 1537 36689
Calabritto AV 12 2391 39080
Montemarano AV 12 2851 41931
Morra De Sanctis AV 13 1297 43228
Villamaina AV 13 995 44223
Guardia Lombardi AV 13 1718 45941
Castelvetere sul Calore AV 14 1615 47556
Acerno SA 14 2783 50339
Senerchia AV 15 842 51181
Paternopoli AV 15 2384 53565
San Mango sul Calore AV 17 1185 54750
Volturara Irpina AV 17 3289 58039
Gesualdo AV 17 3516 61555
Frigento AV 17 3780 65335
Laviano SA 18 1438 66773
Castelnuovo di Conza SA 18 619 67392
Santomenna SA 18 443 67835
Luogosano AV 18 1187 69022
Valva SA 18 1643 70665
Conza della Campania AV 18 1373 72038
Sturno AV 18 3080 75118
Chiusano di San Domenico AV 19 2277 77395
Andretta AV 19 1927 79322
Sant'Angelo all'Esca AV 20 801 80123
Fontanarosa AV 20 3170 83293

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Avellino (54857 inhabitants)
30 Km NE of Battipaglia (50786 inhabitants)
36 Km NE of Salerno (135261 inhabitants)
39 Km E of Cava de' Tirreni (53659 inhabitants)
42 Km SE of Benevento (60091 inhabitants)
51 Km E of Scafati (50787 inhabitants)
57 Km E of Castellammare di Stabia (66466 inhabitants)
63 Km W of Potenza (67122 inhabitants)
64 Km E of Acerra (59573 inhabitants)
64 Km E of Torre del Greco (86275 inhabitants)
64 Km E of Portici (55274 inhabitants)
65 Km E of Ercolano (53709 inhabitants)
68 Km E of Afragola (65057 inhabitants)
70 Km E of Casoria (77642 inhabitants)
70 Km E of Caserta (76326 inhabitants)
73 Km E of Napoli (974074 inhabitants)
76 Km SW of Foggia (151991 inhabitants)
78 Km E of Giugliano in Campania (122974 inhabitants)
78 Km E of Aversa (53047 inhabitants)
78 Km E of Marano di Napoli (59874 inhabitants)
80 Km SW of Cerignola (58396 inhabitants)
87 Km E of Pozzuoli (81661 inhabitants)
95 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 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 21:45:22 ± 0.7
Latitude 40.8577 ± 0.0117
Longitude 15.1198 ± 0.0547
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93321891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4660
Semi-minor axis of confidence ellipse (meter) 1180
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 278
Circular confidence region, given by single value of horizontal uncertainty (meter) 4660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 235
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.134
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.COL3.HHZ.02 2021-07-28T21:45:28.10 3.0 undecidable manual P 0.33 0
IV.MCRV.HHZ. 2021-07-28T21:45:24.20 0.3 undecidable manual P 154 0.0836 118 0.09 74
IV.SNAL.HHZ. 2021-07-28T21:45:24.29 0.1 undecidable manual P 45 0.0953 115 -0.06 100
IX.SNR3.EHZ.02 2021-07-28T21:45:24.90 0.6 undecidable manual P 156 0.134 109 -0.24 48
IX.NSC3.EHZ. 2021-07-28T21:45:23.46 0.6 undecidable manual S 170 0.0108 166 -0.32 48
IX.NSC3.EHZ. 2021-07-28T21:45:22.81 1.0 undecidable manual P 170 0.0108 166 -0.22 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.NSC3.EHE.02 ML:0 7.815E-5 0.14 AML other m 2021-07-28T21:45:24.75
IX.NSC3.EHN.02 ML:0 0.000106 0.1 AML other m 2021-07-28T21:45:24.85
IV.MCRV.HHN. ML:0.6 7.65E-5 0.76 AML other m 2021-07-28T21:45:25.23
IV.MCRV.HHE. ML:0.2 3.15E-5 0.1 AML other m 2021-07-28T21:45:25.83
IX.SNR3.EHN.02 ML:0.7 5.475E-5 0.36 AML other m 2021-07-28T21:45:28.58
IX.SNR3.EHE.02 ML:0.6 4.125E-5 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