Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 22-02-2021 and time 17:14:48 (Italy) in region 2 km SW San Pietro Infine (CE)

A magnitude ML 1.7 earthquake occured in region: 2 km SW San Pietro Infine (CE), on

  • 22-02-2021 16:14:48 (UTC)
  • 22-02-2021 17:14:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.4300, 13.9390 at 8 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
San Pietro Infine CE 2 944 944
San Vittore del Lazio FR 4 2636 3580
Mignano Monte Lungo CE 5 3250 6830
Rocca d'Evandro CE 5 3283 10113
Cervaro FR 6 8109 18222
Sant'Ambrogio sul Garigliano FR 7 966 19188
Conca Casale IS 9 200 19388
Sant'Apollinare FR 9 1919 21307
Galluccio CE 10 2154 23461
Sant'Andrea del Garigliano FR 11 1505 24966
Viticuso FR 11 353 25319
Venafro IS 11 11280 36599
Cassino FR 11 36142 72741
Sesto Campano IS 12 2388 75129
Conca della Campania CE 12 1239 76368
Tora e Piccilli CE 12 910 77278
Pignataro Interamna FR 12 2595 79873
Acquafondata FR 13 263 80136
Vallemaio FR 13 937 81073
Presenzano CE 13 1766 82839
Sant'Elia Fiumerapido FR 14 6166 89005
Pozzilli IS 14 2380 91385
Vallerotonda FR 14 1581 92966
San Giorgio a Liri FR 15 3164 96130
Marzano Appio CE 15 2226 98356
Filignano IS 16 648 99004
Roccamonfina CE 16 3511 102515
Coreno Ausonio FR 16 1644 104159
Castelnuovo Parano FR 16 883 105042
Villa Santa Lucia FR 17 2632 107674
Castelforte LT 17 4386 112060
Piedimonte San Germano FR 17 6535 118595
Santi Cosma e Damiano LT 18 6897 125492
Ausonia FR 18 2619 128111
Capriati a Volturno CE 18 1541 129652
Caianello CE 18 1824 131476
Ciorlano CE 19 426 131902
Terelle FR 19 422 132324
Vairano Patenora CE 19 6594 138918
Belmonte Castello FR 20 739 139657

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km NW of Caserta (76326 inhabitants)
56 Km NW of Aversa (53047 inhabitants)
60 Km NW of Giugliano in Campania (122974 inhabitants)
63 Km NW of Marano di Napoli (59874 inhabitants)
64 Km NW of Afragola (65057 inhabitants)
65 Km NW of Acerra (59573 inhabitants)
65 Km NW of Casoria (77642 inhabitants)
66 Km N of Pozzuoli (81661 inhabitants)
71 Km NW of Napoli (974074 inhabitants)
76 Km NW of Portici (55274 inhabitants)
77 Km NW of Ercolano (53709 inhabitants)
78 Km W of Benevento (60091 inhabitants)
80 Km NW of Torre del Greco (86275 inhabitants)
86 Km E of Latina (125985 inhabitants)
90 Km NW of Scafati (50787 inhabitants)
92 Km NW of Avellino (54857 inhabitants)
94 Km NW of Castellammare di Stabia (66466 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 		ML 1.7 2021-02-22
16:14:48		 41.4302 13.9387 9 2021-07-12
16:55:09		 Bollettino Sismico Italiano INGV 89747261
Reviewed
Rev100 		ML 1.7 2021-02-22
16:14:48		 41.4242 13.916 9 2021-02-22
16:30:53		 Sala Sismica INGV-Roma 87382841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-22 16:14:48 ± 0.14
Latitude 41.4302 ± 0.0090
Longitude 13.9387 ± 0.0108
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89747261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1096
Semi-minor axis of confidence ellipse (meter) 448
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 1100.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.11242
Epicentral distance of station farthest from the epicenter (degree) 0.80759
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 89747261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-03 18:17:52

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 87382841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-22 16:30:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-02-22T16:15:06.33 1.0 undecidable manual S 332 55.3002 50 0.12 24
IV.T0110.HHZ. 2021-02-22T16:15:03.74 0.6 undecidable manual P 351 89.6436 50 -0.25 43
IT.OPI.HGZ. 2021-02-22T16:15:02.59 0.6 undecidable manual S 347 39.4272 50 0.62 43
IV.LRP.EHZ. 2021-02-22T16:15:02.28 0.3 undecidable manual S 310 37.8288 50 0.73 61
IV.POFI.HNZ. 2021-02-22T16:15:01.82 0.6 undecidable manual S 330 37.0296 50 0.5 45
IV.PIGN.HHZ. 2021-02-22T16:15:00.72 0.3 undecidable manual S 142 32.5452 105 0.64 64
IV.INTR.HHZ. 2021-02-22T16:14:59.51 0.6 undecidable manual P 358 64.5909 50 -0.6 41
IV.GIUL.HHZ. 2021-02-22T16:14:59.39 0.6 undecidable manual P 284 58.5969 50 0.19 46
IV.VVLD.HHZ. 2021-02-22T16:14:58.02 0.6 undecidable manual P 332 55.3002 50 -0.67 41
IV.VAGA.HHZ. 2021-02-22T16:14:57.93 0.6 undecidable manual S 94 24.6531 109 0.47 46
IV.CERA.HHZ. 2021-02-22T16:14:56.66 0.6 undecidable manual S 20 19.7691 113 0.79 41
IV.LRP.EHZ. 2021-02-22T16:14:55.48 1.0 undecidable manual P 310 37.8288 50 -0.52 22
IV.RNI2.HNE. 2021-02-22T16:14:55.52 0.3 undecidable manual P 30 35.1426 50 -0.06 74
IV.PIGN.HHZ. 2021-02-22T16:14:55.02 0.3 undecidable manual P 142 32.5452 105 -0.13 73
IV.MIDA.HNZ. 2021-02-22T16:14:55.07 0.3 undecidable manual P 48 35.1426 50 -0.52 67
IV.POFI.HNZ. 2021-02-22T16:14:55.76 0.6 undecidable manual P 330 37.0296 50 -0.11 49
IT.OPI.HGZ. 2021-02-22T16:14:55.98 0.6 undecidable manual P 347 39.4272 50 -0.26 47
IV.VAGA.HHZ. 2021-02-22T16:14:53.14 0.6 undecidable manual P 94 24.6531 109 -0.5 46
IV.MCI.EHZ. 2021-02-22T16:14:53.80 0.3 undecidable manual S 303 12.4764 124 0.16 76
IV.CERA.HHZ. 2021-02-22T16:14:52.59 0.1 undecidable manual P 20 19.7691 113 -0.13 100
IV.MCI.EHZ. 2021-02-22T16:14:51.05 0.1 undecidable manual P 303 12.4764 124 -0.38 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCI.EHE. ML:2.3 0.00263 0.2 AML other m 2021-02-22T16:14:55.63
IV.MCI.EHN. ML:2.1 0.0015666629999999998 0.1664 AML other m 2021-02-22T16:14:55.82
IV.CERA.HNN. ML:2.0 0.000873 1.44 AML other m 2021-02-22T16:14:58.78
IV.CERA.HHN. ML:2.0 0.0008865 1.46 AML other m 2021-02-22T16:14:58.78
IV.VAGA.HNE. ML:1.6 0.000263 0.26 AML other m 2021-02-22T16:15:00.43
IV.VAGA.HHE. ML:1.6 0.0002635 0.24 AML other m 2021-02-22T16:15:00.42
IV.PIGN.HNE. ML:1.5 0.00015167635 0.4096 AML other m 2021-02-22T16:15:01.02
IV.VAGA.HHN. ML:1.8 0.0004095 0.28 AML other m 2021-02-22T16:15:01.81
IV.VAGA.HNN. ML:1.8 0.0003905 0.3 AML other m 2021-02-22T16:15:01.82
IV.PIGN.HHE. ML:1.4 0.00012555 1.74 AML other m 2021-02-22T16:15:02.96
IV.CERA.HHE. ML:1.8 0.0005585 0.34 AML other m 2021-02-22T16:15:02.35
IV.CERA.HNE. ML:1.8 0.0005480000000000001 0.32 AML other m 2021-02-22T16:15:02.36
IV.PIGN.HHN. ML:1.2 0.00007415629 0.3584 AML other m 2021-02-22T16:15:02.54
IV.LRP.EHE. ML:1.4 0.00010347253000000001 0.2048 AML other m 2021-02-22T16:15:04.38
IV.LRP.EHN. ML:1.1 0.000048822485 0.2304 AML other m 2021-02-22T16:15:04.47
IV.VVLD.HHN. ML:1.6 0.00008517087500000001 0.2688 AML other m 2021-02-22T16:15:12.47
IV.VVLD.HHE. ML:1.5 0.00008044999999999999 1.54 AML other m 2021-02-22T16:15:13.95
IV.GIUL.HHN. ML:1.3 0.000044000724999999995 0.2816 AML other m 2021-02-22T16:15:14.78
IV.INTR.HNN. ML:2.0 0.0001845227 0.4992 AML other m 2021-02-22T16:15:15.62
IV.INTR.HHN. ML:1.9 0.000135971585 0.3584 AML other m 2021-02-22T16:15:15.38
IV.INTR.HHE. ML:1.8 0.0001215 0.44 AML other m 2021-02-22T16:15:15.89
IV.T0110.HHE. ML:1.8 0.00007726117 0.384 AML other m 2021-02-22T16:15:24.30
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