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) 40.802, 14.108 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
Monte di Procida NA 5 12886 39446
Pozzuoli NA 5 81661 121107
Procida NA 8 10530 131637
Quarto NA 9 40930 172567
Marano di Napoli NA 13 59874 232441
Napoli NA 13 974074 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
Sant'Antimo NA 18 33905 1563581
Arzano NA 18 34886 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 SW of Marano di Napoli (59874 inhabitants)
13 Km W of Napoli (974074 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

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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
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
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
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 0.3
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

Field Value
Value 2
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

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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance 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 0.2149 50 -3.6 0
IV.IFOR.HHZ. 2021-03-31T23:10:55.53 0.3 undecidable manual P 245 0.2113 50 -4.05 0
IV.CSFT.HHZ. 2021-03-31T23:10:53.33 0.6 undecidable manual S 42 0.036 127 -0.48 45
IV.ICAI.EHN. 2021-03-31T23:10:53.63 0.3 undecidable manual P 237 0.1286 102 -3.23 0
IX.NAPI.HNN.01 2021-03-31T23:10:53.30 0.3 undecidable manual P 55 0.0665 112 0.02 40
IV.IOCA.HHZ. 2021-03-31T23:10:53.77 0.3 undecidable manual P 0.1664 -5.3 0
IV.CBAC.EHE. 2021-03-31T23:10:52.66 0.6 undecidable manual S 292 0.0198 143 0.09 49
IV.CFB2.HHZ. 2021-03-31T23:10:52.46 0.3 undecidable manual S 84 0.0198 144 -0.1 74
IV.CFB1.HHE. 2021-03-31T23:10:52.55 0.6 undecidable manual S 52 0.0135 154 0.37 46
IV.CMIS.HHE. 2021-03-31T23:10:52.41 0.3 undecidable manual S 210 0.0279 134 -0.69 63
IV.CFMN.HHZ. 2021-03-31T23:10:52.86 0.6 undecidable manual S 341 0.0324 130 -0.62 43
IV.CMSN.HHZ. 2021-03-31T23:10:52.75 0.3 undecidable manual P 57 0.0665 112 -0.54 35
IV.CAAM.HHN. 2021-03-31T23:10:52.97 0.6 undecidable manual S 55 0.0306 131 -0.38 46
IV.CFB3.HHZ. 2021-03-31T23:10:52.94 0.3 undecidable manual S 71 0.0207 142 0.31 70
IV.CPOZ.HHZ. 2021-03-31T23:10:52.61 0.3 undecidable manual S 24 0.0207 143 0 75
IV.CAAM.HHN. 2021-03-31T23:10:51.43 0.1 undecidable manual P 55 0.0306 131 0.01 100
IV.CFB3.HHZ. 2021-03-31T23:10:51.29 0.1 undecidable manual P 71 0.0207 142 0.27 95
IV.CPOZ.HHZ. 2021-03-31T23:10:51.22 0.1 undecidable manual P 24 0.0207 143 0.21 96
IV.CBAC.EHE. 2021-03-31T23:10:51.37 0.1 undecidable manual P 292 0.0198 143 0.38 93
IV.CFB2.HHZ. 2021-03-31T23:10:51.05 0.1 undecidable manual P 84 0.0198 144 0.07 99
IV.CSFT.HHZ. 2021-03-31T23:10:51.53 0.1 positive manual P 42 0.036 127 -0.15 97
IV.CFB1.HHE. 2021-03-31T23:10:51.00 0.1 undecidable manual P 52 0.0135 154 0.23 95
IV.CMIS.HHE. 2021-03-31T23:10:51.32 0.1 undecidable manual P 210 0.0279 134 0.04 99
IV.CFMN.HHZ. 2021-03-31T23:10:51.55 0.1 negative manual P 341 0.0324 130 0.05 99
IV.CSOB.HHZ. 2021-03-31T23:10:51.55 0.1 undecidable manual P 48 0.0378 126 -0.2 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CPOZ.HHZ. Md:1.9 24 END duration s
IV.CSFT.HHZ. Md:2.2 32 END duration s
IV.CFMN.HHZ. Md:2.2 34 END duration s
IV.IFOR.HHZ. Md:2 27 END duration s
IV.CAAM.HHN. Md:2.3 40 END duration s
IV.CBAC.EHE. Md:2.2 36 END duration s
IV.CMIS.HHE. Md:2.2 36 END duration s
IV.CFB1.HHE. Md:2.5 48 END duration s
IV.IOCA.HHZ. Md:2.1 28 END duration s
IV.CFB2.HHZ. Md:2.6 53 END duration s
IV.CMSN.HHZ. Md:2.3 36 END duration s
IV.CFB3.HHZ. Md:2.4 44 END duration s
IX.NAPI.HNN.01 Md:2.1 29 END duration s
IV.ICAI.EHN. Md:2 26 END duration s
IV.CSOB.HHZ. Md:2.3 40 END duration s
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in miniseed + resp format Download