Earthquake with magnitude of ML 1.4 on date 22-01-2021 and time 09:46:34 (UTC) in region 2 km SE Stroncone (TR)

A magnitude ML 1.4 earthquake occured in region: 2 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) 42.48, 12.67 at 11 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
Stroncone TR 2 4917 4917
Configni RI 7 633 5550
Greccio RI 9 1558 7108
Cottanello RI 9 563 7671
Terni TR 9 111501 119172
Colli sul Velino RI 9 533 119705
Montasola RI 11 395 120100
Contigliano RI 11 3783 123883
Vacone RI 11 256 124139
Labro RI 11 374 124513
Calvi dell'Umbria TR 13 1856 126369
Narni TR 14 19785 146154
Arrone TR 14 2763 148917
Morro Reatino RI 14 373 149290
Montebuono RI 15 883 150173
Montefranco TR 15 1276 151449
Torri in Sabina RI 15 1256 152705
Rivodutri RI 15 1253 153958
Tarano RI 16 1444 155402
Casperia RI 16 1246 156648
Otricoli TR 17 1869 158517
Poggio Bustone RI 18 2055 160572
Rieti RI 18 47698 208270
San Gemini TR 18 5018 213288
Polino TR 18 233 213521
Ferentillo TR 18 1913 215434
Roccantica RI 18 563 215997
Selci RI 19 1106 217103
Cantalice RI 19 2755 219858
Collevecchio RI 19 1577 221435
Monte San Giovanni in Sabina RI 19 714 222149
Cantalupo in Sabina RI 20 1685 223834

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km S of Terni (111501 inhabitants)
47 Km E of Viterbo (67173 inhabitants)
53 Km S of Foligno (57155 inhabitants)
54 Km N of Guidonia Montecelio (88673 inhabitants)
59 Km N of Tivoli (56533 inhabitants)
61 Km W of L'Aquila (69753 inhabitants)
68 Km N of Roma (2864731 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
85 Km NE of Civitavecchia (52991 inhabitants)
87 Km W of Teramo (54892 inhabitants)
87 Km NE of Fiumicino (78395 inhabitants)
89 Km N of Velletri (53303 inhabitants)
92 Km N of Pomezia (62966 inhabitants)
99 Km N of Aprilia (73446 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 2021-01-22
09:46:34
42.49 12.67 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 ± 0.15
Latitude 42.49 ± 0.01
Longitude 12.67 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86450581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1341
Semi-minor axis of confidence ellipse (meter) 685
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 317
Circular confidence region, given by single value of horizontal uncertainty (meter) 1340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.54589
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SMA1.EHN. 2021-01-22T09:46:52.52 0.6 undecidable manual S 73 0.5081 50 0.72 38
IV.RM33.EHZ. 2021-01-22T09:46:48.47 3.0 undecidable manual S 0
IV.RM33.EHZ. 2021-01-22T09:46:46.71 3.0 undecidable manual P 0
IV.MOMA.HHZ. 2021-01-22T09:46:46.57 3.0 undecidable manual P 0
IV.CESI.HNZ. 2021-01-22T09:46:45.16 0.3 undecidable manual P 18 0.5459 50 0.11 68
IV.LNSS.HHZ. 2021-01-22T09:46:45.32 0.3 undecidable manual S 66 0.2941 50 -0.15 71
IV.SRES.HHN. 2021-01-22T09:46:44.75 0.3 undecidable manual S 206 0.2761 50 -0.19 70
IV.SMA1.EHN. 2021-01-22T09:46:44.65 0.6 undecidable manual P 73 0.5081 50 0.26 44
IV.GAVE.EHZ. 2021-01-22T09:46:44.52 0.3 undecidable manual S 38 0.2626 50 -0.02 73
IV.CESX.HHZ. 2021-01-22T09:46:41.04 0.6 undecidable manual S 332 0.1394 125 0.21 48
IV.SRES.HHN. 2021-01-22T09:46:41.71 1.0 undecidable manual P 206 0.2761 50 1.28 15
IV.ARRO.EHZ. 2021-01-22T09:46:40.08 0.3 undecidable manual S 36 0.116 130 -0.04 75
IV.LNSS.HHZ. 2021-01-22T09:46:40.38 0.3 undecidable manual P 66 0.2941 50 -0.35 68
IV.GAVE.EHZ. 2021-01-22T09:46:39.97 0.3 undecidable manual P 38 0.2626 50 -0.23 70
IV.ARRO.EHZ. 2021-01-22T09:46:37.61 0.1 undecidable manual P 36 0.116 130 -0.03 100
IV.CESX.HHZ. 2021-01-22T09:46:37.95 0.6 undecidable manual P 332 0.1394 125 -0.11 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
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.EHE. ML:1.3 0.000100835935 2.624 AML other m 2021-01-22T09:46:44.68
IV.GAVE.EHN. ML:1.3 9.18E-5 0.7 AML other m 2021-01-22T09:46:48.19
IV.ARRO.EHE. ML:0 0 3.264 AML other m 2021-01-22T09:46:41.05
IV.ARRO.EHN. ML:1.2 0.00018688145 1.0816 AML other m 2021-01-22T09:46:41.72
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download