Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 01-04-2021 and time 01:10:48 (Italy) in region Campi Flegrei

A magnitude Md 2.2 earthquake occured in region: Campi Flegrei, on

  • 31-03-2021 23:10:48 (UTC)
  • 01-04-2021 01:10:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.8020, 14.1080 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.

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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
Monte di Procida NA 5 12886 39446
Pozzuoli NA 5 81661 121107
Procida NA 8 10530 131637
Quarto NA 9 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 15 31122 1310496
Ischia NA 15 19915 1330411
Giugliano in Campania NA 16 122974 1453385
Melito di Napoli NA 17 37826 1491211
Casamicciola Terme NA 18 8362 1499573
Casavatore NA 18 18661 1518234
Parete CE 18 11442 1529676
Arzano NA 18 34886 1564562
Sant'Antimo NA 18 33905 1598467
Barano d'Ischia NA 19 10113 1608580
Casandrino NA 19 14336 1622916
Casoria NA 19 77642 1700558
San Giorgio a Cremano NA 19 45557 1746115
Lacco Ameno NA 19 4853 1750968
Grumo Nevano NA 20 18061 1769029

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km S of Pozzuoli (81661 inhabitants)
13 Km W of Napoli (974074 inhabitants)
13 Km SW of Marano di Napoli (59874 inhabitants)
16 Km SW of Giugliano in Campania (122974 inhabitants)
19 Km SW of Casoria (77642 inhabitants)
20 Km W of Ercolano (53709 inhabitants)
21 Km SW of Aversa (53047 inhabitants)
21 Km W of Portici (55274 inhabitants)
22 Km SW of Afragola (65057 inhabitants)
22 Km W of Torre del Greco (86275 inhabitants)
28 Km SW of Acerra (59573 inhabitants)
34 Km W of Castellammare di Stabia (66466 inhabitants)
36 Km SW of Caserta (76326 inhabitants)
36 Km W of Scafati (50787 inhabitants)
52 Km W of Cava de' Tirreni (53659 inhabitants)
57 Km W of Salerno (135261 inhabitants)
59 Km W of Avellino (54857 inhabitants)
67 Km SW of Benevento (60091 inhabitants)
77 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 2.2 2021-03-31
23:10:48		 40.8022 14.1075 3 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90291921
Reviewed
Rev200 		Md 2.2 2021-03-31
23:10:49		 40.8045 14.1153 4 2021-05-20
10:54:51		 Sala Operativa INGV_OV (Napoli) 88821201
Reviewed
Rev200 		Md 2.0 2021-03-31
23:10:49		 40.7967 14.1128 4 2021-05-20
10:54:35		 Sala Operativa INGV_OV (Napoli) 88655761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 23:10:48 ± 0.19
Latitude 40.8022 ± 0.0027
Longitude 14.1075 ± 0.0024
Depth (km) 3 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90291921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 19
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.21494
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 16
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 15
Type of magnitude Md
Reference to an origin 90291921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-20 10:54:12

Md:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 88821201
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-04-06 10:16:59

Md:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 88655761
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-03-31 23:34:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.HHZ. 2021-03-31T23:12:22.85 3.0 undecidable manual Sn 0.2 0
IV.MBAL.EHZ. 2021-03-31T23:11:52.84 3.0 positive manual Pn 6.94 0
TV.SF04.EHZ. 2021-03-31T23:11:42.55 3.0 undecidable manual Sn -0.07 0
IV.RM33.HNZ. 2021-03-31T23:10:57.29 3.0 undecidable manual P 0.2 0
IV.VPOB.HHZ. 2021-03-31T23:10:56.12 0.3 undecidable manual P 76 23.8539 50 -3.6 0
IV.IFOR.HHZ. 2021-03-31T23:10:55.53 0.3 undecidable manual P 245 23.4543 50 -4.05 0
IV.CSFT.HHZ. 2021-03-31T23:10:53.33 0.6 undecidable manual S 42 3.996 127 -0.48 45
IV.ICAI.EHN. 2021-03-31T23:10:53.63 0.3 undecidable manual P 237 14.2746 102 -3.23 0
IX.NAPI.HNN.01 2021-03-31T23:10:53.30 0.3 undecidable manual P 55 7.3815 112 0.02 40
IV.IOCA.HHZ. 2021-03-31T23:10:53.77 0.3 undecidable manual P 18.4704 -5.3 0
IV.CPOZ.HHZ. 2021-03-31T23:10:52.61 0.3 undecidable manual S 24 2.2977 143 0 75
IV.CFB3.HHZ. 2021-03-31T23:10:52.94 0.3 undecidable manual S 71 2.2977 142 0.31 70
IV.CBAC.EHE. 2021-03-31T23:10:52.66 0.6 undecidable manual S 292 2.1978 143 0.09 49
IV.CFB2.HHZ. 2021-03-31T23:10:52.46 0.3 undecidable manual S 84 2.1978 144 -0.1 74
IV.CFB1.HHE. 2021-03-31T23:10:52.55 0.6 undecidable manual S 52 1.4985 154 0.37 46
IV.CMIS.HHE. 2021-03-31T23:10:52.41 0.3 undecidable manual S 210 3.0969 134 -0.69 63
IV.CFMN.HHZ. 2021-03-31T23:10:52.86 0.6 undecidable manual S 341 3.5964 130 -0.62 43
IV.CMSN.HHZ. 2021-03-31T23:10:52.75 0.3 undecidable manual P 57 7.3815 112 -0.54 35
IV.CAAM.HHN. 2021-03-31T23:10:52.97 0.6 undecidable manual S 55 3.3966 131 -0.38 46
IV.CAAM.HHN. 2021-03-31T23:10:51.43 0.1 undecidable manual P 55 3.3966 131 0.01 100
IV.CPOZ.HHZ. 2021-03-31T23:10:51.22 0.1 undecidable manual P 24 2.2977 143 0.21 96
IV.CFB3.HHZ. 2021-03-31T23:10:51.29 0.1 undecidable manual P 71 2.2977 142 0.27 95
IV.CBAC.EHE. 2021-03-31T23:10:51.37 0.1 undecidable manual P 292 2.1978 143 0.38 93
IV.CFB2.HHZ. 2021-03-31T23:10:51.05 0.1 undecidable manual P 84 2.1978 144 0.07 99
IV.CSFT.HHZ. 2021-03-31T23:10:51.53 0.1 positive manual P 42 3.996 127 -0.15 97
IV.CFB1.HHE. 2021-03-31T23:10:51.00 0.1 undecidable manual P 52 1.4985 154 0.23 95
IV.CMIS.HHE. 2021-03-31T23:10:51.32 0.1 undecidable manual P 210 3.0969 134 0.04 99
IV.CFMN.HHZ. 2021-03-31T23:10:51.55 0.1 negative manual P 341 3.5964 130 0.05 99
IV.CSOB.HHZ. 2021-03-31T23:10:51.55 0.1 undecidable manual P 48 4.1958 126 -0.2 96
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
Waveforms Seismic signals in miniseed + resp format Download