Earthquake with magnitude of Md 1.0 on date 23-03-2023 and time 14:59:44 (UTC) in region Campi Flegrei

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

  • 23-03-2023 14:59:44 (UTC)
  • 23-03-2023 15:59:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.8350, 14.1200 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 3 81661 81661
Quarto NA 5 40930 122591
Bacoli NA 5 26560 149151
Monte di Procida NA 7 12886 162037
Marano di Napoli NA 9 59874 221911
Qualiano NA 10 25702 247613
Calvizzano NA 10 12329 259942
Procida NA 11 10530 270472
Napoli NA 11 974074 1244546
Mugnano di Napoli NA 11 34828 1279374
Villaricca NA 12 31122 1310496
Giugliano in Campania NA 13 122974 1433470
Melito di Napoli NA 14 37826 1471296
Parete CE 14 11442 1482738
Sant'Antimo NA 15 33905 1516643
Casavatore NA 15 18661 1535304
Arzano NA 15 34886 1570190
Casandrino NA 16 14336 1584526
Lusciano CE 16 15362 1599888
Casoria NA 16 77642 1677530
Trentola-Ducenta CE 17 19429 1696959
Grumo Nevano NA 17 18061 1715020
Cesa CE 17 8841 1723861
Aversa CE 17 53047 1776908
Casapesenna CE 17 6987 1783895
San Marcellino CE 18 14155 1798050
Frattamaggiore NA 18 30329 1828379
Sant'Arpino CE 18 14307 1842686
San Giorgio a Cremano NA 18 45557 1888243
Ischia NA 18 19915 1908158
San Cipriano d'Aversa CE 19 13653 1921811
Succivo CE 19 8457 1930268
Frignano CE 19 9008 1939276
Frattaminore NA 19 16208 1955484
Villa di Briano CE 19 7087 1962571
Afragola NA 19 65057 2027628
Gricignano di Aversa CE 19 11881 2039509
Carinaro CE 19 7181 2046690
Crispano NA 19 12354 2059044
Ercolano NA 19 53709 2112753
Teverola CE 19 14291 2127044
Casal di Principe CE 19 21389 2148433
Orta di Atella CE 19 27191 2175624
Cardito NA 19 22755 2198379
Volla NA 20 23755 2222134
Casaluce CE 20 10078 2232212
Portici NA 20 55274 2287486
Villa Literno CE 20 11985 2299471

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km SE of Pozzuoli (81661 inhabitants)
9 Km SW of Marano di Napoli (59874 inhabitants)
11 Km W of Napoli (974074 inhabitants)
13 Km SW of Giugliano in Campania (122974 inhabitants)
16 Km SW of Casoria (77642 inhabitants)
17 Km SW of Aversa (53047 inhabitants)
19 Km SW of Afragola (65057 inhabitants)
19 Km W of Ercolano (53709 inhabitants)
20 Km W of Portici (55274 inhabitants)
21 Km W of Torre del Greco (86275 inhabitants)
25 Km SW of Acerra (59573 inhabitants)
32 Km SW of Caserta (76326 inhabitants)
34 Km W of Castellammare di Stabia (66466 inhabitants)
36 Km W of Scafati (50787 inhabitants)
52 Km W of Cava de' Tirreni (53659 inhabitants)
57 Km W of Salerno (135261 inhabitants)
58 Km W of Avellino (54857 inhabitants)
65 Km SW of Benevento (60091 inhabitants)
77 Km W of Battipaglia (50786 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev200
Md 1.0 2023-03-23
14:59:44
40.8348 14.1203 2 2023-03-23
15:05:43
Sala Operativa INGV-OV (Napoli) 115667441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-23 14:59:44
Latitude 40.8348
Longitude 14.1203
Depth (km) 2 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#SiSmi
Event type earthquake
Origin ID 115667441

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) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
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) 0.06
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:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 115667441
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2023-03-23 15:05:43
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download