Earthquake with magnitude of Md 2.1 on date 22-04-2023 and time 03:24:34 (UTC) in region Campi Flegrei

A magnitude Md 2.1 earthquake occured in region: Campi Flegrei, on

  • 22-04-2023 03:24:34 (UTC)
  • 22-04-2023 05:24:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.8140, 14.0930 at 3 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 2 26560 26560
Pozzuoli NA 4 81661 108221
Monte di Procida NA 4 12886 121107
Procida NA 8 10530 131637
Quarto NA 8 40930 172567
Marano di Napoli NA 13 59874 232441
Qualiano NA 13 25702 258143
Calvizzano NA 13 12329 270472
Napoli NA 14 974074 1244546
Mugnano di Napoli NA 14 34828 1279374
Villaricca NA 15 31122 1310496
Ischia NA 15 19915 1330411
Giugliano in Campania NA 16 122974 1453385
Parete CE 17 11442 1464827
Melito di Napoli NA 17 37826 1502653
Casamicciola Terme NA 17 8362 1511015
Sant'Antimo NA 18 33905 1544920
Casavatore NA 18 18661 1563581
Arzano NA 18 34886 1598467
Barano d'Ischia NA 19 10113 1608580
Lacco Ameno NA 19 4853 1613433
Casandrino NA 19 14336 1627769
Lusciano CE 19 15362 1643131
Trentola-Ducenta CE 19 19429 1662560
Casoria NA 20 77642 1740202
Grumo Nevano NA 20 18061 1758263
Casapesenna CE 20 6987 1765250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km S of Pozzuoli (81661 inhabitants)
13 Km SW of Marano di Napoli (59874 inhabitants)
14 Km W of Napoli (974074 inhabitants)
16 Km SW of Giugliano in Campania (122974 inhabitants)
20 Km SW of Casoria (77642 inhabitants)
20 Km SW of Aversa (53047 inhabitants)
21 Km W of Ercolano (53709 inhabitants)
22 Km SW of Afragola (65057 inhabitants)
22 Km W of Portici (55274 inhabitants)
23 Km W of Torre del Greco (86275 inhabitants)
28 Km SW of Acerra (59573 inhabitants)
35 Km W of Castellammare di Stabia (66466 inhabitants)
35 Km SW of Caserta (76326 inhabitants)
37 Km W of Scafati (50787 inhabitants)
53 Km W of Cava de' Tirreni (53659 inhabitants)
58 Km W of Salerno (135261 inhabitants)
60 Km W of Avellino (54857 inhabitants)
68 Km SW of Benevento (60091 inhabitants)
79 Km W of Battipaglia (50786 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.1 2023-04-22
03:24:34
40.8142 14.0928 3 2024-03-01
17:18:20
Bollettino Sismico Italiano INGV 125093461
Reviewed
Rev200
Md 1.7 2023-04-22
03:24:35
40.8268 14.0855 3 2024-02-07
11:41:26
Sala Operativa INGV-OV (Napoli) 116593471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-22 03:24:34 ± 0.35
Latitude 40.8142 ± 0.0045
Longitude 14.0928 ± 0.0048
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125093461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 424
Semi-minor axis of confidence ellipse (meter) 369
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.06835
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude Md
Reference to an origin 125093461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-07 11:41:11

Md:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 116593471
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2023-04-22 03:55:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAAM.HHN. 2023-04-22T03:24:39.17 0.6 undecidable manual S 81 4.1958 126 -0.53 45
IV.CSTH.HNE. 2023-04-22T03:24:39.37 0.6 undecidable manual S 70 4.995 121 -1.02 36
IV.CPOZ.HNZ. 2023-04-22T03:24:38.53 0.3 undecidable manual S 71 2.2977 143 0.11 74
IV.CMIS.HHZ. 2023-04-22T03:24:38.95 0.6 undecidable manual S 185 3.996 127 -0.62 43
IV.CBAC.HHN. 2023-04-22T03:24:38.10 0.3 undecidable manual S 251 1.0989 160 0.26 72
IV.PTMR.HHN. 2023-04-22T03:24:38.31 0.1 undecidable manual P 220 7.5813 112 -0.85 78
IV.CNIS.HNN. 2023-04-22T03:24:38.76 0.1 undecidable manual P 107 6.1938 116 0.32 94
IV.CSOB.HNZ. 2023-04-22T03:24:37.59 0.1 undecidable manual P 72 4.4955 124 -0.07 99
IV.CFB3.HHZ. 2023-04-22T03:24:37.67 0.1 undecidable manual P 99 3.4965 131 0.45 92
IV.CPOZ.HNZ. 2023-04-22T03:24:37.19 0.1 undecidable manual P 71 2.2977 143 0.4 93
IV.CAAM.HHN. 2023-04-22T03:24:37.58 0.1 undecidable manual P 81 4.1958 126 0.06 99
IV.CMIS.HHZ. 2023-04-22T03:24:37.59 0.1 undecidable manual P 185 3.996 127 0.15 98
IV.CBAC.HHN. 2023-04-22T03:24:37.04 0.1 undecidable manual P 251 1.0989 160 0.57 89
IV.CFMN.HNZ. 2023-04-22T03:24:37.70 0.3 undecidable manual S 354 2.0979 146 -0.58 66
IV.CSFT.HHN. 2023-04-22T03:24:37.53 0.1 undecidable manual P 67 4.2957 126 -0.02 100
IV.CSTH.HNE. 2023-04-22T03:24:37.71 0.1 undecidable manual P 70 4.995 121 -0.19 96
IV.CFMN.HNZ. 2023-04-22T03:24:36.86 0.1 undecidable manual P 354 2.0979 146 0.14 98
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