Earthquake with magnitude of ML 1.4 on date 20-07-2021 and time 04:46:59 (Italy) in region 3 km E Pietraroja (BN)

A magnitude ML 1.4 earthquake occured in region: 3 km E Pietraroja (BN), on

  • 20-07-2021 02:46:59 (UTC)
  • 20-07-2021 04:46:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.349, 14.59 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Pietraroja BN 3 545 545
Morcone BN 6 4932 5477
Cusano Mutri BN 7 4091 9568
Sassinoro BN 7 618 10186
Sepino CB 7 1964 12150
Cerreto Sannita BN 8 3940 16090
San Lorenzello BN 9 2227 18317
Guardia Sanframondi BN 10 5078 23395
Guardiaregia CB 10 801 24196
San Lupo BN 11 801 24997
Pontelandolfo BN 11 2167 27164
San Lorenzo Maggiore BN 11 2154 29318
Faicchio BN 12 3634 32952
San Giuliano del Sannio CB 13 1029 33981
Santa Croce del Sannio BN 13 927 34908
Campochiaro CB 13 646 35554
Castelvenere BN 13 2562 38116
Gioia Sannitica CE 13 3638 41754
Casalduni BN 13 1378 43132
Campolattaro BN 14 1072 44204
Cercepiccola CB 14 681 44885
San Polo Matese CB 15 470 45355
San Salvatore Telesino BN 15 3999 49354
Telese Terme BN 15 7486 56840
Vinchiaturo CB 16 3324 60164
San Potito Sannitico CE 16 1925 62089
Cercemaggiore CB 17 3777 65866
Ponte BN 17 2580 68446
Solopaca BN 17 3820 72266
Castello del Matese CE 18 1494 73760
Piedimonte Matese CE 18 11297 85057
Bojano CB 18 8058 93115
Paupisi BN 18 1633 94748
Puglianello BN 18 1349 96097
Circello BN 18 2388 98485
Fragneto Monforte BN 19 1840 100325
San Gregorio Matese CE 19 988 101313
Colle d'Anchise CB 19 807 102120
Amorosi BN 19 2797 104917
Castelpagano BN 19 1483 106400
Fragneto l'Abate BN 19 1049 107449
Torrecuso BN 20 3407 110856
Mirabello Sannitico CB 20 2180 113036
Baranello CB 20 2673 115709

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Benevento (60091 inhabitants)
37 Km NE of Caserta (76326 inhabitants)
48 Km NE of Acerra (59573 inhabitants)
51 Km NW of Avellino (54857 inhabitants)
53 Km NE of Aversa (53047 inhabitants)
53 Km NE of Afragola (65057 inhabitants)
55 Km NE of Casoria (77642 inhabitants)
57 Km NE of Giugliano in Campania (122974 inhabitants)
60 Km NE of Marano di Napoli (59874 inhabitants)
62 Km NE of Portici (55274 inhabitants)
63 Km NE of Napoli (974074 inhabitants)
63 Km NE of Ercolano (53709 inhabitants)
65 Km N of Torre del Greco (86275 inhabitants)
67 Km N of Scafati (50787 inhabitants)
70 Km NE of Pozzuoli (81661 inhabitants)
73 Km N of Cava de' Tirreni (53659 inhabitants)
73 Km N of Castellammare di Stabia (66466 inhabitants)
76 Km N of Salerno (135261 inhabitants)
76 Km SW of San Severo (53905 inhabitants)
81 Km W of Foggia (151991 inhabitants)
89 Km NW of Battipaglia (50786 inhabitants)
Recent and historical seismicity
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
Reviewed
Rev100
ML 1.4 2021-07-20
02:46:59
41.3492 14.5895 9 2021-07-20
02:56:31
Sala Sismica INGV-Roma 92972591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-20 02:46:59 ± 0.1
Latitude 41.3492 ± 0.0054
Longitude 14.5895 ± 0.0084
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92972591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 500
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38581
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 92972591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-20 02:56:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HVIT.HHZ. 2021-07-20T02:48:45.12 3.0 undecidable manual Sn -3.75 0
IV.FNVD.HHZ. 2021-07-20T02:48:40.72 3.0 undecidable manual Sn -1.16 0
IV.QLNO.HHZ. 2021-07-20T02:48:26.83 3.0 undecidable manual Pn 10.1 0
IV.MNTV.EHZ. 2021-07-20T02:48:13.13 3.0 positive manual Pn 5.64 0
OX.VARN.HHZ. 2021-07-20T02:48:09.87 3.0 undecidable manual Pn -2.23 0
IV.MURB.HHZ. 2021-07-20T02:48:09.06 3.0 undecidable manual Sn -0.26 0
OT.CGL1.HHZ. 2021-07-20T02:48:08.44 3.0 undecidable manual Sg 1.04 0
IV.NDIM.HHZ. 2021-07-20T02:48:07.97 3.0 negative manual Pn 4.04 0
IV.LMD.HHZ. 2021-07-20T02:47:59.98 3.0 undecidable manual Pg 9.71 0
IV.COR1.EHZ. 2021-07-20T02:47:47.21 3.0 undecidable manual Pg 8.51 0
IV.LPEL.HHZ. 2021-07-20T02:47:27.64 3.0 undecidable manual S -0.72 0
IV.LPEL.HHZ. 2021-07-20T02:47:14.24 3.0 undecidable manual P 0.8 0
IV.VAGA.HHZ. 2021-07-20T02:47:10.34 0.3 undecidable manual S 284 0.2743 106 -0.22 72
IV.MIDA.HHN. 2021-07-20T02:47:07.62 0.1 undecidable manual P 319 0.3858 50 -0.22 94
IV.BSSO.HHZ. 2021-07-20T02:47:07.82 0.3 undecidable manual S 1 0.197 112 0.09 75
IV.GATE.HHZ. 2021-07-20T02:47:06.83 0.1 undecidable manual P 56 0.2905 50 0.62 83
IV.SGG.HHZ. 2021-07-20T02:47:06.85 0.3 undecidable manual S 283 0.1619 116 0.34 72
IV.VITU.HHZ. 2021-07-20T02:47:06.69 0.3 undecidable manual S 170 0.1691 115 -0.05 75
IV.VAGA.HHZ. 2021-07-20T02:47:05.89 0.1 undecidable manual P 284 0.2743 106 -0.01 99
IV.BSSO.HHZ. 2021-07-20T02:47:04.12 0.3 positive manual P 1 0.197 112 -0.15 73
IV.SACR.HHZ. 2021-07-20T02:47:04.42 0.6 undecidable manual S 61 0.0998 129 -0.05 50
IV.PSB1.HHE. 2021-07-20T02:47:04.67 0.1 undecidable manual P 127 0.2086 111 0.16 97
IV.VITU.HHZ. 2021-07-20T02:47:03.63 0.1 undecidable manual P 170 0.1691 115 -0.07 100
IV.SGG.HHZ. 2021-07-20T02:47:03.87 0.6 positive manual P 283 0.1619 116 0.3 48
IV.SACR.HHZ. 2021-07-20T02:47:01.91 0.1 positive manual P 61 0.0998 129 -0.48 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACR.HHN. ML:1.7 0.0006635 1.3 AML other m 2021-07-20T02:47:04.11
IV.SACR.HHE. ML:1.7 0.00074166415 0.3392 AML other m 2021-07-20T02:47:04.96
IV.SGG.HHN. ML:1.2 0.000149 0.28 AML other m 2021-07-20T02:47:09.71
IV.BSSO.HHE. ML:1.3 0.000134 1.14 AML other m 2021-07-20T02:47:11.09
IV.SGG.HHE. ML:1.1 0.0001106 0.34 AML other m 2021-07-20T02:47:12.17
IV.VAGA.HHE. ML:0.9 4.22E-5 0.56 AML other m 2021-07-20T02:47:16.29
IV.VAGA.HHN. ML:1.4 0.0001075 0.4 AML other m 2021-07-20T02:47:16.52
IV.BSSO.HHN. ML:1.1 9.655E-5 0.56 AML other m 2021-07-20T02:47:17.51
IV.FNVD.HHE. ML:3 4.82E-5 0.76 AML other m 2021-07-20T02:48:19.44
IV.FNVD.HHN. ML:3.1 6.52E-5 0.06 AML other m 2021-07-20T02:48:55.67
IV.SACR.HNE. ML:1.8 0.0008019273 0.3488 AML other m 2021-07-20T02:47:04.80
IV.SACR.HNN. ML:1.7 0.0006473846 0.6992 AML other m 2021-07-20T02:47:04.76
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