Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-01-2021 and time 12:41:40 (UTC) in region 4 km W San Biagio Saracinisco (FR)

A magnitude ML 1.6 earthquake occured in region: 4 km W San Biagio Saracinisco (FR), on

  • 09-01-2021 12:41:40 (UTC)
  • 09-01-2021 13:41:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.6100, 13.8840 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
Villa Latina FR 4 1241 1241
San Biagio Saracinisco FR 4 349 1590
Picinisco FR 5 1218 2808
Vallerotonda FR 7 1581 4389
Belmonte Castello FR 7 739 5128
Atina FR 7 4316 9444
Settefrati FR 7 728 10172
Sant'Elia Fiumerapido FR 8 6166 16338
Gallinaro FR 9 1269 17607
Acquafondata FR 9 263 17870
Terelle FR 11 422 18292
Viticuso FR 12 353 18645
San Donato Val di Comino FR 13 2107 20752
Casalattico FR 13 574 21326
Cassino FR 14 36142 57468
Casalvieri FR 14 2698 60166
Cervaro FR 14 8109 68275
Pizzone IS 14 329 68604
Villa Santa Lucia FR 15 2632 71236
Alvito FR 15 2713 73949
Scapoli IS 15 680 74629
Castel San Vincenzo IS 16 516 75145
Filignano IS 16 648 75793
Conca Casale IS 16 200 75993
Vicalvi FR 17 783 76776
Piedimonte San Germano FR 17 6535 83311
San Vittore del Lazio FR 17 2636 85947
Colle San Magno FR 17 699 86646
Rocchetta a Volturno IS 17 1113 87759
Castrocielo FR 18 3965 91724
Posta Fibreno FR 18 1139 92863
Civitella Alfedena AQ 18 296 93159
Pozzilli IS 18 2380 95539
Colli a Volturno IS 18 1349 96888
Fontechiari FR 19 1303 98191
Alfedena AQ 19 864 99055
Roccasecca FR 19 7365 106420
Barrea AQ 19 726 107146
Cerro al Volturno IS 19 1281 108427
San Pietro Infine CE 19 944 109371
Villetta Barrea AQ 19 653 110024
Venafro IS 19 11280 121304
Montenero Val Cocchiara IS 19 538 121842
Opi AQ 20 420 122262
Aquino FR 20 5370 127632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
70 Km NW of Caserta (76326 inhabitants)
76 Km NW of Aversa (53047 inhabitants)
80 Km NW of Giugliano in Campania (122974 inhabitants)
83 Km E of Latina (125985 inhabitants)
83 Km NW of Marano di Napoli (59874 inhabitants)
84 Km NW of Acerra (59573 inhabitants)
84 Km NW of Afragola (65057 inhabitants)
85 Km NW of Casoria (77642 inhabitants)
86 Km S of Chieti (51815 inhabitants)
87 Km N of Pozzuoli (81661 inhabitants)
91 Km NW of Napoli (974074 inhabitants)
92 Km SE of L'Aquila (69753 inhabitants)
92 Km NW of Benevento (60091 inhabitants)
92 Km E of Velletri (53303 inhabitants)
96 Km NW of Portici (55274 inhabitants)
97 Km NW of Ercolano (53709 inhabitants)
98 Km E of Tivoli (56533 inhabitants)
99 Km S of Pescara (121014 inhabitants)
100 Km NW of Torre del Greco (86275 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 1.6 2021-01-09
12:41:40		 41.6095 13.8837 8 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88913901
Reviewed
Rev100 		ML 1.6 2021-01-09
12:41:40		 41.6027 13.8852 9 2021-01-09
13:11:41		 Sala Sismica INGV-Roma 86122111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-09 12:41:40 ± 0.05
Latitude 41.6095 ± 0.0036
Longitude 13.8837 ± 0.0036
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88913901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 256
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 194
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.10162
Epicentral distance of station farthest from the epicenter (degree) 0.54679
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:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 86122111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-09 13:11:41

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 88913901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-07 01:07:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTQR.HHZ. 2021-01-09T12:42:00.02 0.6 undecidable manual S 319 60.6948 50 0.25 44
IV.GIUL.HHZ. 2021-01-09T12:41:57.99 0.6 undecidable manual S 264 52.503 50 0.41 43
IV.INTR.HHZ. 2021-01-09T12:41:55.78 0.3 undecidable manual S 2 44.622 50 0.31 67
IV.VAGA.HHZ. 2021-01-09T12:41:53.36 0.6 undecidable manual S 126 36.2415 50 0.13 47
IV.VVLD.HHZ. 2021-01-09T12:41:52.68 0.6 undecidable manual S 323 36.0417 50 -0.5 43
IV.MIDA.HHZ. 2021-01-09T12:41:51.33 0.3 undecidable manual S 83 30.9468 105 -0.21 70
IV.PTQR.HHZ. 2021-01-09T12:41:51.52 0.3 undecidable manual P 319 60.6948 50 -0.09 68
IV.LIK.EHN.01 2021-01-09T12:41:51.17 0.6 undecidable manual S 246 29.5482 105 0.09 48
IV.GIUL.HHZ. 2021-01-09T12:41:50.11 0.3 undecidable manual P 264 52.503 50 -0.23 67
IV.SGG.HHN. 2021-01-09T12:41:50.05 0.6 undecidable manual P 121 48.0186 50 0.41 43
IV.INTR.HHZ. 2021-01-09T12:41:49.03 0.3 undecidable manual P 2 44.622 50 -0.09 70
IV.LRP.EHZ. 2021-01-09T12:41:49.61 0.3 undecidable manual S 280 24.9528 108 0.04 73
IV.VAGA.HHZ. 2021-01-09T12:41:47.99 0.3 undecidable manual P 126 36.2415 50 0.16 70
IV.VVLD.HHZ. 2021-01-09T12:41:47.23 0.3 undecidable manual P 323 36.0417 50 -0.57 63
IV.POFI.HNZ. 2021-01-09T12:41:47.67 0.3 undecidable manual S 310 18.5703 114 0.18 72
IT.OPI.HGZ. 2021-01-09T12:41:47.72 0.3 undecidable manual S 347 19.0698 113 0.09 73
IV.MIDA.HHZ. 2021-01-09T12:41:46.51 0.3 undecidable manual P 83 30.9468 105 -0.34 68
IV.LIK.EHN.01 2021-01-09T12:41:46.63 0.3 undecidable manual P 246 29.5482 105 0.04 72
IV.MCI.EHZ. 2021-01-09T12:41:45.91 0.6 undecidable manual S 204 14.3745 119 -0.28 47
IV.CERA.HHZ. 2021-01-09T12:41:45.68 0.6 undecidable manual S 97 11.2776 126 0.42 46
IV.LRP.EHZ. 2021-01-09T12:41:45.60 0.3 undecidable manual P 280 24.9528 108 -0.11 72
IT.OPI.HGZ. 2021-01-09T12:41:44.68 0.3 undecidable manual P 347 19.0698 113 0.09 73
IV.POFI.HNZ. 2021-01-09T12:41:44.54 0.1 undecidable manual P 310 18.5703 114 0.02 98
IV.CERA.HHZ. 2021-01-09T12:41:43.22 0.1 positive manual P 97 11.2776 126 -0.01 100
IV.MCI.EHZ. 2021-01-09T12:41:43.79 0.1 undecidable manual P 204 14.3745 119 0.03 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERA.HNN. ML:1.8 0.0008740194999999999 0.32 AML other m 2021-01-09T12:41:46.34
IV.CERA.HHN. ML:1.8 0.0009093773 0.32 AML other m 2021-01-09T12:41:46.34
IV.MCI.EHE. ML:2.3 0.0020499999999999997 0.2 AML other m 2021-01-09T12:41:47.35
IV.MCI.EHN. ML:2.1 0.00125 1.76 AML other m 2021-01-09T12:41:47.08
IV.CERA.HNE. ML:1.8 0.00077983695 0.3584 AML other m 2021-01-09T12:41:48.34
IV.CERA.HHE. ML:1.8 0.0007933817499999999 0.3584 AML other m 2021-01-09T12:41:48.34
IV.MIDA.HNE. ML:1.2 0.00007763586999999999 0.2176 AML other m 2021-01-09T12:41:52.43
IV.MIDA.HHE. ML:1.1 0.00006572465500000001 0.1984 AML other m 2021-01-09T12:41:53.29
IV.MIDA.HHN. ML:1.2 0.00007708661 0.2176 AML other m 2021-01-09T12:41:53.27
IV.VVLD.HHE. ML:1.2 0.000071801155 0.1216 AML other m 2021-01-09T12:41:54.41
IV.VVLD.HHN. ML:1.2 0.00006134464 0.1792 AML other m 2021-01-09T12:41:55.09
IV.INTR.HNE. ML:1.6 0.00012582121 0.544 AML other m 2021-01-09T12:41:56.80
IV.VVLD.HNN. ML:1.6 0.000152088 2.1376 AML other m 2021-01-09T12:41:56.61
IV.INTR.HHE. ML:1.3 0.00006531508 1.76 AML other m 2021-01-09T12:41:57.79
IV.VVLD.HNE. ML:1.5 0.00012724315 1.0752 AML other m 2021-01-09T12:41:57.81
IV.INTR.HNN. ML:1.6 0.00012482165 0.8704 AML other m 2021-01-09T12:42:05.02
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