Earthquake with magnitude of Md 1.0 on date 25-10-2021 and time 17:02:00 (Italy) in region Campi Flegrei

A magnitude Md 1.0 earthquake occured in region: Campi Flegrei, on

  • 25-10-2021 15:02:00 (UTC)
  • 25-10-2021 17:02:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.819, 14.135 at 2 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
Pozzuoli NA 5 81661 81661
Bacoli NA 5 26560 108221
Quarto NA 7 40930 149151
Monte di Procida NA 7 12886 162037
Napoli NA 10 974074 1136111
Marano di Napoli NA 10 59874 1195985
Procida NA 11 10530 1206515
Calvizzano NA 11 12329 1218844
Qualiano NA 12 25702 1244546
Mugnano di Napoli NA 12 34828 1279374
Villaricca NA 13 31122 1310496
Giugliano in Campania NA 14 122974 1433470
Melito di Napoli NA 14 37826 1471296
Casavatore NA 15 18661 1489957
Arzano NA 15 34886 1524843
Sant'Antimo NA 15 33905 1558748
Parete CE 16 11442 1570190
Casandrino NA 16 14336 1584526
Casoria NA 16 77642 1662168
San Giorgio a Cremano NA 17 45557 1707725
Grumo Nevano NA 17 18061 1725786
Lusciano CE 18 15362 1741148
Ercolano NA 18 53709 1794857
Trentola-Ducenta CE 18 19429 1814286
Cesa CE 18 8841 1823127
Frattamaggiore NA 18 30329 1853456
Aversa CE 18 53047 1906503
Ischia NA 18 19915 1926418
Sant'Arpino CE 19 14307 1940725
Portici NA 19 55274 1995999
Afragola NA 19 65057 2061056
Casapesenna CE 19 6987 2068043
San Marcellino CE 19 14155 2082198
Volla NA 19 23755 2105953
Frattaminore NA 19 16208 2122161
Succivo CE 19 8457 2130618
Cercola NA 20 18267 2148885
Crispano NA 20 12354 2161239
Cardito NA 20 22755 2183994
Torre del Greco NA 20 86275 2270269
Gricignano di Aversa CE 20 11881 2282150
Frignano CE 20 9008 2291158

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km SE of Pozzuoli (81661 inhabitants)
10 Km W of Napoli (974074 inhabitants)
10 Km SW of Marano di Napoli (59874 inhabitants)
14 Km SW of Giugliano in Campania (122974 inhabitants)
16 Km SW of Casoria (77642 inhabitants)
18 Km W of Ercolano (53709 inhabitants)
18 Km SW of Aversa (53047 inhabitants)
19 Km W of Portici (55274 inhabitants)
19 Km SW of Afragola (65057 inhabitants)
20 Km W of Torre del Greco (86275 inhabitants)
25 Km SW of Acerra (59573 inhabitants)
32 Km W of Castellammare di Stabia (66466 inhabitants)
33 Km SW of Caserta (76326 inhabitants)
34 Km W of Scafati (50787 inhabitants)
50 Km W of Cava de' Tirreni (53659 inhabitants)
55 Km W of Salerno (135261 inhabitants)
57 Km W of Avellino (54857 inhabitants)
65 Km SW of Benevento (60091 inhabitants)
75 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 2021-10-25
15:02:00
40.8188 14.135 2 2021-10-25
15:14:21
Sala Operativa INGV-OV (Napoli) 96982961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 15:02:00
Latitude 40.8188
Longitude 14.1350
Depth (km) 2 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#SiSmi
Event type earthquake
Origin ID 96982961

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) 100
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
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) 0.02
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 96982961
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2021-10-25 15:14:21
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