Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 22-01-2021 and time 10:46:34 (Italy) in region 4 km SE Stroncone (TR)

A magnitude ML 1.4 earthquake occured in region: 4 km SE Stroncone (TR), on

  • 22-01-2021 09:46:34 (UTC)
  • 22-01-2021 10:46:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4710, 12.6840 at 10 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
Stroncone TR 4 4917 4917
Configni RI 6 633 5550
Cottanello RI 7 563 6113
Greccio RI 7 1558 7671
Colli sul Velino RI 9 533 8204
Montasola RI 9 395 8599
Contigliano RI 10 3783 12382
Vacone RI 10 256 12638
Terni TR 11 111501 124139
Labro RI 11 374 124513
Calvi dell'Umbria TR 12 1856 126369
Torri in Sabina RI 14 1256 127625
Montebuono RI 14 883 128508
Morro Reatino RI 14 373 128881
Arrone TR 15 2763 131644
Tarano RI 15 1444 133088
Casperia RI 15 1246 134334
Narni TR 15 19785 154119
Rivodutri RI 15 1253 155372
Montefranco TR 16 1276 156648
Rieti RI 16 47698 204346
Roccantica RI 17 563 204909
Poggio Bustone RI 17 2055 206964
Selci RI 17 1106 208070
Monte San Giovanni in Sabina RI 18 714 208784
Otricoli TR 18 1869 210653
Cantalice RI 18 2755 213408
Cantalupo in Sabina RI 18 1685 215093
Polino TR 18 233 215326
Collevecchio RI 18 1577 216903
Ferentillo TR 19 1913 218816
Poggio Catino RI 19 1341 220157
San Gemini TR 20 5018 225175

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Terni (111501 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
52 Km N of Guidonia Montecelio (88673 inhabitants)
54 Km S of Foligno (57155 inhabitants)
57 Km N of Tivoli (56533 inhabitants)
60 Km W of L'Aquila (69753 inhabitants)
66 Km N of Roma (2864731 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
84 Km NE of Civitavecchia (52991 inhabitants)
86 Km NE of Fiumicino (78395 inhabitants)
86 Km W of Teramo (54892 inhabitants)
87 Km N of Velletri (53303 inhabitants)
90 Km N of Pomezia (62966 inhabitants)
97 Km N of Aprilia (73446 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 1.4 2021-01-22
09:46:34		 42.4707 12.6843 10 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87942921
Reviewed
Rev100 		ML 1.4 2021-01-22
09:46:34		 42.485 12.6743 11 2021-01-22
10:13:07		 Sala Sismica INGV-Roma 86450581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 09:46:34 ± 0.09
Latitude 42.4707 ± 0.0036
Longitude 12.6843 ± 0.0073
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87942921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 588
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.12411
Epicentral distance of station farthest from the epicenter (degree) 0.57557
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 86450581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 10:13:07

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 87942921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-09 12:01:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MC2.EHZ. 2021-01-22T09:46:54.67 0.6 undecidable manual S 40 63.8916 50 0.76 38
IV.SMA1.EHN. 2021-01-22T09:46:52.19 0.6 undecidable manual S 71 56.0994 50 0.37 44
IV.RM33.EHZ. 2021-01-22T09:46:48.50 0.6 undecidable manual S 84 43.623 50 0.01 48
IV.MOMA.HHZ. 2021-01-22T09:46:47.02 0.6 undecidable manual S 346 38.1285 50 -0.01 48
IV.FIAM.HNN. 2021-01-22T09:46:47.79 0.6 undecidable manual S 122 42.0246 50 -0.28 46
IV.MC2.EHZ. 2021-01-22T09:46:45.92 0.3 undecidable manual P 40 63.8916 50 0.39 64
IV.LNSS.HHZ. 2021-01-22T09:46:45.32 0.3 undecidable manual S 63 32.5452 50 -0.24 70
IV.CESI.HNZ. 2021-01-22T09:46:45.16 0.3 undecidable manual P 17 61.8936 50 -0.07 69
IV.SRES.HHN. 2021-01-22T09:46:44.57 0.3 undecidable manual S 209 29.6481 50 -0.19 71
IV.GAVE.EHZ. 2021-01-22T09:46:44.52 0.3 undecidable manual S 35 29.9478 50 -0.34 69
IV.SMA1.EHN. 2021-01-22T09:46:44.65 0.6 undecidable manual P 71 56.0994 50 0.32 44
IT.MMP1.HGE. 2021-01-22T09:46:43.09 0.6 undecidable manual S 168 25.1526 111 -0.34 46
IV.FIAM.HNN. 2021-01-22T09:46:42.08 0.3 undecidable manual P 122 42.0246 50 -0.08 71
IV.RM33.EHZ. 2021-01-22T09:46:42.46 0.3 undecidable manual P 84 43.623 50 0.06 71
IV.MOMA.HHZ. 2021-01-22T09:46:41.97 0.6 undecidable manual P 346 38.1285 50 0.41 45
IV.LNSS.HHZ. 2021-01-22T09:46:40.38 0.3 undecidable manual P 63 32.5452 50 -0.33 69
IV.CESX.HHZ. 2021-01-22T09:46:40.74 0.6 undecidable manual S 332 17.2716 119 -0.2 48
IV.SRES.HHN. 2021-01-22T09:46:40.64 0.6 undecidable manual P 209 29.6481 50 0.39 45
IV.ARRO.EHZ. 2021-01-22T09:46:39.89 0.3 undecidable manual S 29 13.7751 125 -0.03 76
IT.MMP1.HGE. 2021-01-22T09:46:39.92 0.3 undecidable manual P 168 25.1526 111 0.44 68
IV.GAVE.EHZ. 2021-01-22T09:46:39.97 0.3 undecidable manual P 35 29.9478 50 -0.34 69
IV.ARRO.EHZ. 2021-01-22T09:46:37.52 0.1 undecidable manual P 29 13.7751 125 0.07 100
IV.CESX.HHZ. 2021-01-22T09:46:37.91 0.3 undecidable manual P 332 17.2716 119 -0.13 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.2 0.00018688145 1.0816 AML other m 2021-01-22T09:46:41.72
IV.GAVE.EHE. ML:1.3 0.000100835935 0.624 AML other m 2021-01-22T09:46:44.68
IV.LNSS.HHE. ML:1.6 0.000169 0.12 AML other m 2021-01-22T09:46:45.58
IV.LNSS.HHN. ML:1.4 0.0001205 0.44 AML other m 2021-01-22T09:46:45.46
IV.GAVE.EHN. ML:1.3 0.0000918 0.7 AML other m 2021-01-22T09:46:48.19
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