Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 09-02-2021 and time 04:43:04 (UTC) in region 1 km NE Stroncone (TR)

A magnitude ML 1.4 earthquake occured in region: 1 km NE Stroncone (TR), on

  • 09-02-2021 04:43:04 (UTC)
  • 09-02-2021 05:43:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5050, 12.6780 at 11 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 1 4917 4917
Terni TR 7 111501 116418
Colli sul Velino RI 9 533 116951
Greccio RI 9 1558 118509
Configni RI 9 633 119142
Labro RI 10 374 119516
Cottanello RI 11 563 120079
Arrone TR 12 2763 122842
Montefranco TR 13 1276 124118
Contigliano RI 13 3783 127901
Morro Reatino RI 13 373 128274
Montasola RI 13 395 128669
Narni TR 13 19785 148454
Vacone RI 14 256 148710
Calvi dell'Umbria TR 15 1856 150566
Rivodutri RI 15 1253 151819
Ferentillo TR 16 1913 153732
San Gemini TR 16 5018 158750
Polino TR 16 233 158983
Montebuono RI 17 883 159866
Torri in Sabina RI 17 1256 161122
Poggio Bustone RI 17 2055 163177
Tarano RI 18 1444 164621
Casperia RI 19 1246 165867
Otricoli TR 19 1869 167736
Rieti RI 19 47698 215434
Cantalice RI 19 2755 218189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km SE of Terni (111501 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
50 Km S of Foligno (57155 inhabitants)
56 Km N of Guidonia Montecelio (88673 inhabitants)
61 Km N of Tivoli (56533 inhabitants)
62 Km W of L'Aquila (69753 inhabitants)
70 Km N of Roma (2864731 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
86 Km W of Teramo (54892 inhabitants)
86 Km NE of Civitavecchia (52991 inhabitants)
89 Km NE of Fiumicino (78395 inhabitants)
91 Km N of Velletri (53303 inhabitants)
94 Km N of Pomezia (62966 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 2021-02-09
04:43:04		 42.5052 12.6775 11 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88410481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-09 04:43:04 ± 0.18
Latitude 42.5052 ± 0.0081
Longitude 12.6775 ± 0.0122
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88410481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 989
Semi-minor axis of confidence ellipse (meter) 898
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 308
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61873
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 88410481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-23 13:45:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMDO.HHZ. 2021-02-09T04:44:00.22 3.0 undecidable manual Sg 11.54 0
IV.CPGN.EHZ. 2021-02-09T04:43:48.25 3.0 undecidable manual Sg 9.02 0
IV.MMO1.EHZ. 2021-02-09T04:43:26.21 1.0 undecidable manual S 50 68.6757 50 0.68 19
IV.CESI.HHZ. 2021-02-09T04:43:23.00 0.3 undecidable manual S 18 58.3971 50 0.19 67
IV.NRCA.HHZ. 2021-02-09T04:43:20.73 0.1 undecidable manual S 44 50.9157 50 -0.08 93
IV.MMO1.EHZ. 2021-02-09T04:43:16.67 0.1 undecidable manual P 50 68.6757 50 -0.03 91
IV.CESI.HHZ. 2021-02-09T04:43:15.07 0.1 undecidable manual P 18 58.3971 50 -0.06 92
IV.LNSS.HHZ. 2021-02-09T04:43:15.58 0.6 undecidable manual S 70 31.5462 50 -0.05 48
IV.AGLI.HHZ. 2021-02-09T04:43:15.29 3.0 positive manual Pn 2.13 0
IV.GAVE.EHZ. 2021-02-09T04:43:14.36 0.3 undecidable manual S 40 27.2505 50 -0.12 72
IV.NRCA.HHZ. 2021-02-09T04:43:13.88 0.1 undecidable manual P 44 50.9157 50 -0.09 93
IV.LNSS.HHZ. 2021-02-09T04:43:11.13 0.1 undecidable manual P 70 31.5462 50 0.14 95
IV.GAVE.EHZ. 2021-02-09T04:43:10.24 0.1 undecidable manual P 40 27.2505 50 -0.08 97
IV.ARRO.EHZ. 2021-02-09T04:43:09.87 0.3 undecidable manual S 41 10.878 134 -0.05 75
IV.ARRO.EHZ. 2021-02-09T04:43:07.76 0.1 undecidable manual P 41 10.878 134 0.08 100
IV.CPGN.EHZ. 2021-02-09T04:43:06.67 3.0 positive manual Pg 8.47 0
IV.GIB.HHZ. 2021-02-09T04:43:05.20 3.0 negative manual Pg 9.23 0
IV.MCEL.HHZ. 2021-02-09T04:42:35.05 3.0 undecidable manual S -4.09 0
IX.SFL3.HNZ.01 2021-02-09T04:42:19.27 3.0 undecidable manual P 3.4 0
IV.MRLC.HHZ. 2021-02-09T04:42:16.28 3.0 undecidable manual P 0.87 0
IV.MCRV.HHZ. 2021-02-09T04:42:13.96 3.0 undecidable manual P 1.04 0
IV.PTRJ.HNZ. 2021-02-09T04:42:13.41 3.0 undecidable manual P -2.52 0
IX.CLT3.HHZ.02 2021-02-09T04:42:11.97 3.0 positive manual P -0.67 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1.5 0.0003735 0.2 AML other m 2021-02-09T04:43:10.44
IV.ARRO.EHN. ML:1.5 0.000365 1.74 AML other m 2021-02-09T04:43:10.87
IV.LNSS.HHE. ML:1.3 0.0000997 0.54 AML other m 2021-02-09T04:43:17.71
IV.LNSS.HHN. ML:1.4 0.0001075 0.64 AML other m 2021-02-09T04:43:18.61
IV.NRCA.HHE. ML:1.4 0.000060700000000000005 0.72 AML other m 2021-02-09T04:43:21.37
IV.CESI.HHN. ML:1.3 0.000046450000000000004 0.42 AML other m 2021-02-09T04:43:23.73
IV.NRCA.HHN. ML:1.2 0.00004233692 4.6784 AML other m 2021-02-09T04:43:23.43
IV.CESI.HHE. ML:1.4 0.00005751076 2.2208 AML other m 2021-02-09T04:43:23.30
IV.GAVE.EHN. ML:1.2 0.000084110295 0.1824 AML other m 2021-02-09T04:43:16.42
IV.GAVE.EHE. ML:1.2 0.00007768499 0.2176 AML other m 2021-02-09T04:43:15.99
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