Earthquake with magnitude of Md 1.0 on date 23-08-2021 and time 12:17:10 (Italy) in region Vesuvio

A magnitude Md 1.0 earthquake occured in region: Vesuvio, on

  • 23-08-2021 10:17:10 (UTC)
  • 23-08-2021 12:17:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.822, 14.424 at 0 km depth.

The earthquake was located by: Sala Operativa INGV_OV (Napoli).

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
Massa di Somma NA 5 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Sant'Anastasia NA 5 27671 42311
Somma Vesuviana NA 5 35233 77544
Ottaviano NA 6 23860 101404
Pollena Trocchia NA 6 13562 114966
Portici NA 6 55274 170240
Trecase NA 6 9097 179337
Boscotrecase NA 6 10363 189700
Torre del Greco NA 6 86275 275975
Terzigno NA 6 18968 294943
Ercolano NA 7 53709 348652
Boscoreale NA 7 28072 376724
Cercola NA 7 18267 394991
San Giuseppe Vesuviano NA 7 30657 425648
Torre Annunziata NA 7 42789 468437
San Giorgio a Cremano NA 8 45557 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 10 39922 577671
San Gennaro Vesuviano NA 10 11966 589637
Poggiomarino NA 10 21976 611613
Pompei NA 10 25358 636971
Castello di Cisterna NA 11 7869 644840
Brusciano NA 11 16466 661306
Scisciano NA 12 5994 667300
Mariglianella NA 12 7787 675087
Marigliano NA 12 30157 705244
Scafati SA 12 50787 756031
Casalnuovo di Napoli NA 12 49855 805886
Palma Campania NA 12 15978 821864
Saviano NA 12 15982 837846
San Vitaliano NA 12 6461 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Carbonara di Nola NA 14 2429 866855
Nola NA 15 34431 901286
Acerra NA 15 59573 960859
San Paolo Bel Sito NA 15 3513 964372
Casoria NA 15 77642 1042014
Napoli NA 15 974074 2016088
San Marzano sul Sarno SA 15 10442 2026530
Afragola NA 15 65057 2091587
Castellammare di Stabia NA 15 66466 2158053
Angri SA 15 34002 2192055
Sant'Antonio Abate NA 15 19743 2211798
Liveri NA 15 1607 2213405
Domicella AV 15 1862 2215267
San Valentino Torio SA 15 10947 2226214
Casavatore NA 15 18661 2244875
Cimitile NA 16 7280 2252155
Marzano di Nola AV 16 1727 2253882
Arzano NA 16 34886 2288768
Sarno SA 16 31529 2320297
Lettere NA 17 6188 2326485
Casamarciano NA 17 3289 2329774
Casola di Napoli NA 17 3898 2333672
Gragnano NA 17 29136 2362808
Camposano NA 17 5333 2368141
Pago del Vallo di Lauro AV 17 1830 2369971
Vico Equense NA 17 20969 2390940
Cardito NA 18 22755 2413695
Sant'Egidio del Monte Albino SA 18 8909 2422604
Visciano NA 18 4454 2427058
Comiziano NA 18 1814 2428872
Corbara SA 18 2545 2431417
Pimonte NA 18 5980 2437397
Caivano NA 18 37879 2475276
Frattamaggiore NA 18 30329 2505605
Pagani SA 19 35834 2541439
Lauro AV 19 3509 2544948
Cicciano NA 19 12906 2557854
Crispano NA 19 12354 2570208
Grumo Nevano NA 19 18061 2588269
Tufino NA 19 3776 2592045
Taurano AV 19 1546 2593591
Casandrino NA 19 14336 2607927
Quindici AV 19 1938 2609865
Frattaminore NA 20 16208 2626073
Meta NA 20 8015 2634088
Melito di Napoli NA 20 37826 2671914

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Portici (55274 inhabitants)
6 Km NE of Torre del Greco (86275 inhabitants)
7 Km E of Ercolano (53709 inhabitants)
12 Km NW of Scafati (50787 inhabitants)
15 Km SE of Acerra (59573 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km E of Napoli (974074 inhabitants)
15 Km SE of Afragola (65057 inhabitants)
15 Km NW of Castellammare di Stabia (66466 inhabitants)
21 Km E of Marano di Napoli (59874 inhabitants)
22 Km SE of Giugliano in Campania (122974 inhabitants)
25 Km SE of Aversa (53047 inhabitants)
27 Km NW of Cava de' Tirreni (53659 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
29 Km S of Caserta (76326 inhabitants)
33 Km NW of Salerno (135261 inhabitants)
33 Km W of Avellino (54857 inhabitants)
46 Km SW of Benevento (60091 inhabitants)
53 Km W of Battipaglia (50786 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev200
Md 1.0 2021-08-23
10:17:10
40.8223 14.4245 0 2021-08-23
10:23:39
Sala Operativa INGV_OV (Napoli) 94537501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-23 10:17:10
Latitude 40.8223
Longitude 14.4245
Depth (km) 0 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#WinPick
Event type earthquake
Origin ID 94537501

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information

Md:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 94537501
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-08-23 10:23:39
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