Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.9 on date 07-02-2021 and time 03:13:45 (UTC) in region Campi Flegrei

A magnitude Md 1.9 earthquake occured in region: Campi Flegrei, on

  • 07-02-2021 03:13:45 (UTC)
  • 07-02-2021 04:13:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.8120, 14.1150 at 4 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 3 26560 26560
Pozzuoli NA 5 81661 108221
Monte di Procida NA 5 12886 121107
Quarto NA 8 40930 162037
Procida NA 9 10530 172567
Marano di Napoli NA 12 59874 232441
Napoli NA 12 974074 1206515
Calvizzano NA 13 12329 1218844
Qualiano NA 13 25702 1244546
Mugnano di Napoli NA 13 34828 1279374
Villaricca NA 14 31122 1310496
Giugliano in Campania NA 15 122974 1433470
Melito di Napoli NA 16 37826 1471296
Ischia NA 17 19915 1491211
Casavatore NA 17 18661 1509872
Parete CE 17 11442 1521314
Sant'Antimo NA 17 33905 1555219
Arzano NA 17 34886 1590105
Casandrino NA 18 14336 1604441
Casoria NA 18 77642 1682083
San Giorgio a Cremano NA 19 45557 1727640
Grumo Nevano NA 19 18061 1745701
Lusciano CE 19 15362 1761063
Casamicciola Terme NA 19 8362 1769425
Trentola-Ducenta CE 19 19429 1788854
Cesa CE 20 8841 1797695
Ercolano NA 20 53709 1851404
Aversa CE 20 53047 1904451
Frattamaggiore NA 20 30329 1934780
Casapesenna CE 20 6987 1941767

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km SE of Pozzuoli (81661 inhabitants)
12 Km SW of Marano di Napoli (59874 inhabitants)
12 Km W of Napoli (974074 inhabitants)
15 Km SW of Giugliano in Campania (122974 inhabitants)
18 Km SW of Casoria (77642 inhabitants)
20 Km W of Ercolano (53709 inhabitants)
20 Km SW of Aversa (53047 inhabitants)
20 Km W of Portici (55274 inhabitants)
21 Km SW of Afragola (65057 inhabitants)
21 Km W of Torre del Greco (86275 inhabitants)
26 Km SW of Acerra (59573 inhabitants)
33 Km W of Castellammare di Stabia (66466 inhabitants)
35 Km SW of Caserta (76326 inhabitants)
35 Km W of Scafati (50787 inhabitants)
51 Km W of Cava de' Tirreni (53659 inhabitants)
56 Km W of Salerno (135261 inhabitants)
58 Km W of Avellino (54857 inhabitants)
66 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 1.9 2021-02-07
03:13:45		 40.8118 14.1153 4 2021-07-12
16:55:06		 Bollettino Sismico Italiano INGV 89055711
Reviewed
Rev200 		Md 2.2 2021-02-07
03:13:46		 40.8143 14.13 2 2021-04-19
14:16:40		 Sala Operativa INGV_OV (Napoli) 86897621
Reviewed
Rev200 		Md 2.0 2021-02-07
03:13:46		 40.802 14.118 3 2021-04-19
14:16:29		 Sala Operativa INGV_OV (Napoli) 86930421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-07 03:13:45 ± 0.24
Latitude 40.8118 ± 0.0036
Longitude 14.1153 ± 0.0036
Depth (km) 4 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89055711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00450
Epicentral distance of station farthest from the epicenter (degree) 0.05666
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 11
Type of magnitude Md
Reference to an origin 89055711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-19 14:15:47

Md:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 86930421
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-02-08 10:13:15

Md:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 86897621
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-02-07 04:03:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CFB3.HHZ. 2021-02-07T03:13:49.31 0.1 undecidable manual S 102 1.5984 157 0.32 95
IV.CAAM.HHZ. 2021-02-07T03:13:49.14 0.6 undecidable manual S 67 2.2977 148 -0.18 49
IV.COLB.HHZ. 2021-02-07T03:13:49.04 0.1 undecidable manual S 74 2.7972 142 -0.54 90
IV.CBAC.EHZ. 2021-02-07T03:13:49.15 0.1 undecidable manual S 265 2.7972 143 -0.41 93
IV.CFMN.HHZ. 2021-02-07T03:13:49.19 0.6 undecidable manual S 322 2.997 141 -0.5 45
IV.CFB2.HHZ. 2021-02-07T03:13:48.83 0.1 undecidable manual S 119 1.7982 154 -0.23 97
IX.NAPI.HNZ.01 2021-02-07T03:13:48.20 0.3 undecidable manual P 60 6.2937 120 -0.89 58
IV.CPOZ.HHZ. 2021-02-07T03:13:48.91 0.1 undecidable manual S 15 1.0989 164 0.09 99
IV.CPIS.HHZ. 2021-02-07T03:13:48.06 0.3 undecidable manual P 54 3.2967 138 0.24 72
IV.CFB1.HHZ. 2021-02-07T03:13:48.86 0.3 undecidable manual S 110 0.4995 172 0.15 74
IV.CMSN.HHZ. 2021-02-07T03:13:48.48 0.3 undecidable manual P 62 6.2937 120 -0.63 65
IV.COLB.HHZ. 2021-02-07T03:13:47.76 0.1 positive manual P 74 2.7972 142 0.11 99
IV.CFB1.HHZ. 2021-02-07T03:13:47.35 0.1 negative manual P 110 0.4995 172 0.19 98
IV.CSFT.HHZ. 2021-02-07T03:13:47.80 0.1 undecidable manual P 47 2.7972 142 0.15 98
IV.CBAC.EHZ. 2021-02-07T03:13:47.82 0.1 negative manual P 265 2.7972 143 0.18 97
IV.CFMN.HHZ. 2021-02-07T03:13:47.94 0.1 positive manual P 322 2.997 141 0.23 96
IV.CMIS.HHZ. 2021-02-07T03:13:47.84 0.1 positive manual P 211 4.3956 130 -0.4 93
IV.CAAM.HHZ. 2021-02-07T03:13:47.81 0.1 positive manual P 67 2.2977 148 0.31 95
IV.CFB2.HHZ. 2021-02-07T03:13:47.42 0.1 negative manual P 119 1.7982 154 0.06 100
IV.CFB3.HHZ. 2021-02-07T03:13:47.68 0.1 undecidable manual P 102 1.5984 157 0.36 94
IV.CPOZ.HHZ. 2021-02-07T03:13:47.56 0.1 positive manual P 15 1.0989 164 0.34 94
IV.CSOB.HHZ. 2021-02-07T03:13:47.89 0.1 positive manual P 54 2.997 141 0.17 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
Waveforms Seismic signals in miniseed + resp format Download