Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 22-01-2021 and time 09:58:50 (Italy) in region 3 km NE Configni (RI)

A magnitude ML 1.7 earthquake occured in region: 3 km NE Configni (RI), on

  • 22-01-2021 08:58:50 (UTC)
  • 22-01-2021 09:58:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.45, 12.67 at 9 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.

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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
Configni RI 4 633 633
Cottanello RI 5 563 1196
Stroncone TR 6 4917 6113
Montasola RI 7 395 6508
Vacone RI 7 256 6764
Greccio RI 8 1558 8322
Contigliano RI 9 3783 12105
Calvi dell'Umbria TR 10 1856 13961
Colli sul Velino RI 11 533 14494
Montebuono RI 11 883 15377
Torri in Sabina RI 11 1256 16633
Tarano RI 12 1444 18077
Casperia RI 12 1246 19323
Terni TR 13 111501 130824
Labro RI 14 374 131198
Roccantica RI 14 563 131761
Selci RI 15 1106 132867
Narni TR 15 19785 152652
Cantalupo in Sabina RI 16 1685 154337
Collevecchio RI 16 1577 155914
Morro Reatino RI 16 373 156287
Monte San Giovanni in Sabina RI 16 714 157001
Otricoli TR 16 1869 158870
Rieti RI 16 47698 206568
Rivodutri RI 17 1253 207821
Poggio Catino RI 17 1341 209162
Arrone TR 17 2763 211925
Forano RI 18 3179 215104
Magliano Sabina RI 18 3774 218878
Montefranco TR 18 1276 220154
Poggio Bustone RI 19 2055 222209
Stimigliano RI 19 2328 224537
Cantalice RI 19 2755 227292

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Terni (111501 inhabitants)
47 Km E of Viterbo (67173 inhabitants)
50 Km N of Guidonia Montecelio (88673 inhabitants)
55 Km N of Tivoli (56533 inhabitants)
57 Km S of Foligno (57155 inhabitants)
61 Km W of L'Aquila (69753 inhabitants)
64 Km N of Roma (2864731 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
82 Km E of Civitavecchia (52991 inhabitants)
83 Km NE of Fiumicino (78395 inhabitants)
85 Km N of Velletri (53303 inhabitants)
88 Km N of Pomezia (62966 inhabitants)
88 Km W of Teramo (54892 inhabitants)
95 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 1.7 2021-01-22
08:58:50		 42.45 12.67 9 2021-01-22
09:07:12		 Sala Sismica INGV-Roma 86449501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 08:58:50 ± 0.26
Latitude 42.45 ± 0.01
Longitude 12.67 ± 0.02
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86449501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1674
Semi-minor axis of confidence ellipse (meter) 874
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 1670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 220
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.75273
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86449501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 09:07:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MARS.EHZ. 2021-01-22T09:00:50.05 3.0 undecidable manual Sn -8.72 0
IV.GIZZ.HHZ. 2021-01-22T09:00:50.77 3.0 undecidable manual Sn 0.49 0
IV.SARZ.HHZ. 2021-01-22T09:00:36.13 3.0 undecidable manual Sn 4.08 0
IV.EUCT.HNZ. 2021-01-22T09:00:35.65 3.0 undecidable manual Sn 0.98 0
IV.FREG.EHZ. 2021-01-22T09:00:24.71 3.0 undecidable manual Sn -4.31 0
IV.PTRP.HHZ. 2021-01-22T09:00:22.07 3.0 undecidable manual Sn 1.39 0
IV.PZUN.HHZ. 2021-01-22T09:00:20.29 3.0 undecidable manual Sg 5.18 0
IV.CMPR.HHZ. 2021-01-22T09:00:14.59 3.0 undecidable manual Sn 0.59 0
ST.CARE.EHZ. 2021-01-22T09:00:07.47 3.0 positive manual Pg 11.89 0
NI.VINO.HHZ. 2021-01-22T09:00:01.39 3.0 negative manual Pg 11.52 0
IV.SARZ.HHZ. 2021-01-22T08:59:57.30 3.0 undecidable manual Pg 9.14 0
IV.PTRJ.HNZ. 2021-01-22T08:59:46.32 3.0 undecidable manual Sg 0.6 0
IV.PTRJ.HNZ. 2021-01-22T08:59:21.69 3.0 undecidable manual Pn -0.44 0
IV.LPEL.HHZ. 2021-01-22T08:59:16.37 3.0 undecidable manual P 2.32 0
IV.CSP1.EHZ. 2021-01-22T08:59:16.60 0.3 undecidable manual S 31 0.7527 50 0.68 58
IV.CPGN.HNZ. 2021-01-22T08:59:16.18 3.0 undecidable manual P -0.26 0
IV.FDMO.HHZ. 2021-01-22T08:59:13.61 0.3 undecidable manual S 27 0.6628 50 0.37 65
IV.CESI.HHZ. 2021-01-22T08:59:11.30 0.3 undecidable manual S 17 0.5819 50 0.44 65
IV.NRCA.HHZ. 2021-01-22T08:59:08.29 0.6 undecidable manual S 40 0.5045 50 -0.27 46
IV.CSP1.EHZ. 2021-01-22T08:59:04.82 0.1 undecidable manual P 31 0.7527 50 -0.45 84
IV.FIAM.HHZ. 2021-01-22T08:59:04.99 0.6 undecidable manual S 119 0.375 50 0.27 47
IV.FDMO.HHZ. 2021-01-22T08:59:03.73 0.1 undecidable manual P 27 0.6628 50 0 94
IV.LNSS.HHZ. 2021-01-22T08:59:02.30 0.6 undecidable manual S 60 0.3121 50 -0.57 44
IV.CESI.HHZ. 2021-01-22T08:59:02.30 0.6 undecidable manual P 17 0.5819 50 -0.05 47
IV.GAVE.EHZ. 2021-01-22T08:59:01.68 0.6 undecidable manual S 34 0.2941 50 -0.64 43
IV.NRCA.HHZ. 2021-01-22T08:59:00.82 0.1 undecidable manual P 40 0.5045 50 -0.2 93
IV.FIAM.HHZ. 2021-01-22T08:58:59.10 0.6 undecidable manual P 119 0.375 50 0.29 47
IV.GAVE.EHZ. 2021-01-22T08:58:57.31 0.3 negative manual P 34 0.2941 50 -0.11 74
IV.ARRO.EHZ. 2021-01-22T08:58:57.29 0.6 undecidable manual S 28 0.1484 119 0.04 52
IV.LNSS.HHZ. 2021-01-22T08:58:57.70 0.1 negative manual P 60 0.3121 50 -0.04 100
IV.CESX.HHZ. 2021-01-22T08:58:57.85 0.6 undecidable manual S 339 0.1718 116 -0.22 49
IV.CESX.HHZ. 2021-01-22T08:58:55.21 1.0 positive manual P 339 0.1718 116 0.24 25
IV.ARRO.EHZ. 2021-01-22T08:58:54.79 0.3 positive manual P 28 0.1484 119 0.3 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.6 0.0003865 1.08 AML other m 2021-01-22T08:58:58.94
IV.ARRO.EHE. ML:1.8 0.0005555 0.38 AML other m 2021-01-22T08:58:58.41
IV.CESX.HHN. ML:1.2 0.000132 1.56 AML other m 2021-01-22T08:59:02.01
IV.CESX.HHE. ML:1.2 0.0001185 1.66 AML other m 2021-01-22T08:59:02.96
IV.LNSS.HHE. ML:1.9 0.0003465 0.14 AML other m 2021-01-22T08:59:02.81
IV.LNSS.HHN. ML:1.8 0.000286 0.5 AML other m 2021-01-22T08:59:03.76
IV.GAVE.EHE. ML:1.7 0.0002075 0.16 AML other m 2021-01-22T08:59:04.97
IV.GAVE.EHN. ML:1.6 0.000175 0.72 AML other m 2021-01-22T08:59:05.42
IV.NRCA.HHN. ML:1.9 0.0001725 0.12 AML other m 2021-01-22T08:59:08.52
IV.NRCA.HHE. ML:2.1 0.0002695 0.16 AML other m 2021-01-22T08:59:08.72
IV.CESI.HHE. ML:1.6 7.135E-5 1.4 AML other m 2021-01-22T08:59:12.17
IV.CESI.HHN. ML:1.5 6.525E-5 0.66 AML other m 2021-01-22T08:59:13.43
IV.FDMO.HHE. ML:1.7 7.47E-5 1.84 AML other m 2021-01-22T08:59:13.98
IV.FDMO.HHN. ML:1.5 4.835E-5 0.42 AML other m 2021-01-22T08:59:14.64
IV.PTRJ.HNN. ML:4.1 0.00402 0.58 AML other m 2021-01-22T08:59:50.42
IV.PTRJ.HHN. ML:4.1 0.00427 0.56 AML other m 2021-01-22T08:59:50.42
IV.PTRJ.HNE. ML:3.8 0.00208 0.44 AML other m 2021-01-22T08:59:57.66
IV.PTRJ.HHE. ML:3.9 0.00245 0.86 AML other m 2021-01-22T08:59:58.44
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download