Earthquake with magnitude of Md 1.0 on date 21-07-2021 and time 22:36:41 (Italy) in region Vesuvio

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

  • 21-07-2021 20:36:41 (UTC)
  • 21-07-2021 22:36:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.826, 14.432 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
Ottaviano NA 5 23860 23860
Somma Vesuviana NA 5 35233 59093
Massa di Somma NA 5 5444 64537
San Sebastiano al Vesuvio NA 5 9196 73733
Sant'Anastasia NA 5 27671 101404
Pollena Trocchia NA 6 13562 114966
Terzigno NA 6 18968 133934
Boscotrecase NA 6 10363 144297
Trecase NA 6 9097 153394
San Giuseppe Vesuviano NA 6 30657 184051
Portici NA 7 55274 239325
Boscoreale NA 7 28072 267397
Torre del Greco NA 7 86275 353672
Cercola NA 7 18267 371939
Ercolano NA 7 53709 425648
Torre Annunziata NA 8 42789 468437
San Giorgio a Cremano NA 8 45557 513994
San Gennaro Vesuviano NA 9 11966 525960
Volla NA 9 23755 549715
Pomigliano d'Arco NA 10 39922 589637
Poggiomarino NA 10 21976 611613
Pompei NA 10 25358 636971
Castello di Cisterna NA 10 7869 644840
Brusciano NA 11 16466 661306
Scisciano NA 11 5994 667300
Marigliano NA 11 30157 697457
Mariglianella NA 11 7787 705244
Palma Campania NA 12 15978 721222
Saviano NA 12 15982 737204
Scafati SA 12 50787 787991
San Vitaliano NA 12 6461 794452
Casalnuovo di Napoli NA 12 49855 844307
Striano NA 12 8397 852704
Carbonara di Nola NA 13 2429 855133
Santa Maria la Carità NA 14 11722 866855
Nola NA 14 34431 901286
San Paolo Bel Sito NA 14 3513 904799
Liveri NA 14 1607 906406
San Marzano sul Sarno SA 14 10442 916848
Acerra NA 14 59573 976421
Domicella AV 14 1862 978283
Angri SA 15 34002 1012285
Casoria NA 15 77642 1089927
San Valentino Torio SA 15 10947 1100874
Afragola NA 15 65057 1165931
Sant'Antonio Abate NA 15 19743 1185674
Cimitile NA 15 7280 1192954
Castellammare di Stabia NA 15 66466 1259420
Marzano di Nola AV 15 1727 1261147
Napoli NA 15 974074 2235221
Casavatore NA 16 18661 2253882
Casamarciano NA 16 3289 2257171
Sarno SA 16 31529 2288700
Lettere NA 17 6188 2294888
Camposano NA 17 5333 2300221
Arzano NA 17 34886 2335107
Casola di Napoli NA 17 3898 2339005
Pago del Vallo di Lauro AV 17 1830 2340835
Gragnano NA 17 29136 2369971
Visciano NA 17 4454 2374425
Sant'Egidio del Monte Albino SA 17 8909 2383334
Comiziano NA 17 1814 2385148
Corbara SA 18 2545 2387693
Cardito NA 18 22755 2410448
Lauro AV 18 3509 2413957
Vico Equense NA 18 20969 2434926
Cicciano NA 18 12906 2447832
Pimonte NA 18 5980 2453812
Caivano NA 18 37879 2491691
Tufino NA 18 3776 2495467
Pagani SA 18 35834 2531301
Taurano AV 18 1546 2532847
Frattamaggiore NA 19 30329 2563176
Quindici AV 19 1938 2565114
Crispano NA 19 12354 2577468
Grumo Nevano NA 19 18061 2595529
Casandrino NA 20 14336 2609865
Roccarainola NA 20 7082 2616947
Frattaminore NA 20 16208 2633155
Nocera Inferiore SA 20 46043 2679198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km E of Portici (55274 inhabitants)
7 Km NE of Torre del Greco (86275 inhabitants)
7 Km E of Ercolano (53709 inhabitants)
12 Km NW of Scafati (50787 inhabitants)
14 Km SE of Acerra (59573 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km SE of Afragola (65057 inhabitants)
15 Km N of Castellammare di Stabia (66466 inhabitants)
15 Km E of Napoli (974074 inhabitants)
22 Km E of Marano di Napoli (59874 inhabitants)
23 Km SE of Giugliano in Campania (122974 inhabitants)
25 Km SE of Aversa (53047 inhabitants)
27 Km NW of Cava de' Tirreni (53659 inhabitants)
29 Km E of Pozzuoli (81661 inhabitants)
29 Km S of Caserta (76326 inhabitants)
32 Km NW of Salerno (135261 inhabitants)
32 Km W of Avellino (54857 inhabitants)
45 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 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
Rev200
Md 1.0 2021-07-21
20:36:41
40.8262 14.432 0 2021-07-21
21:07:12
Sala Operativa INGV_OV (Napoli) 93031781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-21 20:36:41
Latitude 40.8262
Longitude 14.4320
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 93031781

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) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
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) 0.13
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 93031781
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-07-21 21:07:12
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