Earthquake with magnitude of Md 1.0 on date 12-08-2021 and time 02:52:01 (Italy) in region Campi Flegrei

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

  • 12-08-2021 00:52:01 (UTC)
  • 12-08-2021 02:52:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.834, 14.128 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
Pozzuoli NA 3 81661 81661
Quarto NA 5 40930 122591
Bacoli NA 6 26560 149151
Monte di Procida NA 8 12886 162037
Marano di Napoli NA 9 59874 221911
Calvizzano NA 10 12329 234240
Qualiano NA 10 25702 259942
Napoli NA 10 974074 1234016
Mugnano di Napoli NA 11 34828 1268844
Villaricca NA 11 31122 1299966
Procida NA 12 10530 1310496
Giugliano in Campania NA 12 122974 1433470
Melito di Napoli NA 13 37826 1471296
Parete CE 14 11442 1482738
Sant'Antimo NA 14 33905 1516643
Casavatore NA 15 18661 1535304
Arzano NA 15 34886 1570190
Casandrino NA 16 14336 1584526
Casoria NA 16 77642 1662168
Lusciano CE 16 15362 1677530
Grumo Nevano NA 16 18061 1695591
Trentola-Ducenta CE 16 19429 1715020
Cesa CE 17 8841 1723861
Aversa CE 17 53047 1776908
Frattamaggiore NA 17 30329 1807237
Casapesenna CE 17 6987 1814224
San Giorgio a Cremano NA 17 45557 1859781
Sant'Arpino CE 17 14307 1874088
San Marcellino CE 18 14155 1888243
Succivo CE 18 8457 1896700
Frattaminore NA 18 16208 1912908
Afragola NA 18 65057 1977965
Frignano CE 19 9008 1986973
San Cipriano d'Aversa CE 19 13653 2000626
Ercolano NA 19 53709 2054335
Ischia NA 19 19915 2074250
Villa di Briano CE 19 7087 2081337
Gricignano di Aversa CE 19 11881 2093218
Crispano NA 19 12354 2105572
Carinaro CE 19 7181 2112753
Cardito NA 19 22755 2135508
Orta di Atella CE 19 27191 2162699
Teverola CE 19 14291 2176990
Portici NA 19 55274 2232264
Volla NA 19 23755 2256019
Casal di Principe CE 19 21389 2277408
Casaluce CE 20 10078 2287486
Cercola NA 20 18267 2305753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km E of Pozzuoli (81661 inhabitants)
9 Km SW of Marano di Napoli (59874 inhabitants)
10 Km W of Napoli (974074 inhabitants)
12 Km SW of Giugliano in Campania (122974 inhabitants)
16 Km SW of Casoria (77642 inhabitants)
17 Km SW of Aversa (53047 inhabitants)
18 Km SW of Afragola (65057 inhabitants)
19 Km W of Ercolano (53709 inhabitants)
19 Km W of Portici (55274 inhabitants)
21 Km W of Torre del Greco (86275 inhabitants)
24 Km SW of Acerra (59573 inhabitants)
32 Km SW of Caserta (76326 inhabitants)
34 Km W of Castellammare di Stabia (66466 inhabitants)
35 Km W of Scafati (50787 inhabitants)
51 Km W of Cava de' Tirreni (53659 inhabitants)
56 Km W of Salerno (135261 inhabitants)
57 Km W of Avellino (54857 inhabitants)
64 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 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 2021-08-12
00:52:01
40.8342 14.128 3 2021-08-12
01:09:31
Sala Operativa INGV_OV (Napoli) 93983291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-12 00:52:01
Latitude 40.8342
Longitude 14.1280
Depth (km) 3 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#WinPick
Event type earthquake
Origin ID 93983291

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) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
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) 0.1
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 93983291
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-08-12 01:09:31
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