Earthquake with magnitude of Md 1.0 on date 25-11-2021 and time 06:59:22 (Italy) in region Campi Flegrei

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

  • 25-11-2021 05:59:22 (UTC)
  • 25-11-2021 06:59:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.797, 14.113 at 3 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
Bacoli NA 3 26560 26560
Monte di Procida NA 5 12886 39446
Pozzuoli NA 6 81661 121107
Procida NA 8 10530 131637
Quarto NA 10 40930 172567
Napoli NA 13 974074 1146641
Marano di Napoli NA 13 59874 1206515
Calvizzano NA 14 12329 1218844
Qualiano NA 14 25702 1244546
Mugnano di Napoli NA 15 34828 1279374
Villaricca NA 16 31122 1310496
Ischia NA 16 19915 1330411
Giugliano in Campania NA 17 122974 1453385
Melito di Napoli NA 18 37826 1491211
Casavatore NA 18 18661 1509872
Casamicciola Terme NA 18 8362 1518234
Parete CE 18 11442 1529676
Arzano NA 18 34886 1564562
Sant'Antimo NA 19 33905 1598467
Barano d'Ischia NA 19 10113 1608580
San Giorgio a Cremano NA 19 45557 1654137
Casoria NA 19 77642 1731779
Casandrino NA 20 14336 1746115
Ercolano NA 20 53709 1799824
Lacco Ameno NA 20 4853 1804677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km S of Pozzuoli (81661 inhabitants)
13 Km W of Napoli (974074 inhabitants)
13 Km SW of Marano di Napoli (59874 inhabitants)
17 Km SW of Giugliano in Campania (122974 inhabitants)
19 Km SW of Casoria (77642 inhabitants)
20 Km W of Ercolano (53709 inhabitants)
21 Km W of Portici (55274 inhabitants)
21 Km SW of Aversa (53047 inhabitants)
21 Km W of Torre del Greco (86275 inhabitants)
22 Km SW of Afragola (65057 inhabitants)
27 Km SW of Acerra (59573 inhabitants)
33 Km W of Castellammare di Stabia (66466 inhabitants)
35 Km W of Scafati (50787 inhabitants)
36 Km SW of Caserta (76326 inhabitants)
51 Km W of Cava de' Tirreni (53659 inhabitants)
56 Km W of Salerno (135261 inhabitants)
59 Km W of Avellino (54857 inhabitants)
67 Km SW of Benevento (60091 inhabitants)
76 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 2021-11-25
05:59:22
40.797 14.1127 3 2021-11-25
06:14:20
Sala Operativa INGV-OV (Napoli) 97774001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-25 05:59:22
Latitude 40.7970
Longitude 14.1127
Depth (km) 3 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#SiSmi
Event type earthquake
Origin ID 97774001

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) 163
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) 0.07
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 97774001
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2021-11-25 06:14:20
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