Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 16-01-2021 and time 14:22:11 (Italy) in region 4 km N Cottanello (RI)

A magnitude ML 1.9 earthquake occured in region: 4 km N Cottanello (RI), on

  • 16-01-2021 13:22:11 (UTC)
  • 16-01-2021 14:22:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.44, 12.7 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
Cottanello RI 4 563 563
Configni RI 5 633 1196
Greccio RI 6 1558 2754
Montasola RI 6 395 3149
Contigliano RI 7 3783 6932
Stroncone TR 7 4917 11849
Vacone RI 8 256 12105
Colli sul Velino RI 9 533 12638
Torri in Sabina RI 11 1256 13894
Calvi dell'Umbria TR 12 1856 15750
Montebuono RI 12 883 16633
Casperia RI 12 1246 17879
Labro RI 13 374 18253
Tarano RI 13 1444 19697
Roccantica RI 14 563 20260
Terni TR 14 111501 131761
Rieti RI 14 47698 179459
Monte San Giovanni in Sabina RI 14 714 180173
Morro Reatino RI 15 373 180546
Selci RI 15 1106 181652
Rivodutri RI 15 1253 182905
Cantalupo in Sabina RI 16 1685 184590
Poggio Catino RI 16 1341 185931
Poggio Bustone RI 17 2055 187986
Collevecchio RI 17 1577 189563
Arrone TR 17 2763 192326
Cantalice RI 17 2755 195081
Narni TR 17 19785 214866
Otricoli TR 18 1869 216735
Forano RI 18 3179 219914
Montefranco TR 18 1276 221190
Stimigliano RI 19 2328 223518
Poggio Mirteto RI 20 6315 229833
Polino TR 20 233 230066
Magliano Sabina RI 20 3774 233840

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SE of Terni (111501 inhabitants)
49 Km E of Viterbo (67173 inhabitants)
49 Km N of Guidonia Montecelio (88673 inhabitants)
54 Km N of Tivoli (56533 inhabitants)
57 Km S of Foligno (57155 inhabitants)
58 Km W of L'Aquila (69753 inhabitants)
64 Km N of Roma (2864731 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
84 Km NE of Fiumicino (78395 inhabitants)
84 Km E of Civitavecchia (52991 inhabitants)
84 Km N of Velletri (53303 inhabitants)
86 Km W of Teramo (54892 inhabitants)
87 Km N of Pomezia (62966 inhabitants)
94 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 1.9 2021-01-16
13:22:11		 42.44 12.7 9 2021-01-16
13:35:39		 Sala Sismica INGV-Roma 86303851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-16 13:22:11 ± 0.11
Latitude 42.44 ± 0.00
Longitude 12.70 ± 0.01
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 86303851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 661
Semi-minor axis of confidence ellipse (meter) 476
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.74734
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 86303851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-16 13:35:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRTC.HHZ. 2021-01-16T13:22:53.83 3.0 undecidable manual S 0.37 0
TV.SF04.EHZ. 2021-01-16T13:22:39.07 3.0 undecidable manual S -2.87 0
IV.PE3.EHZ. 2021-01-16T13:22:37.08 3.0 positive manual P 2.93 0
IV.CSP1.EHZ. 2021-01-16T13:22:37.38 0.6 undecidable manual S 30 0.7473 50 0.86 35
IV.FDMO.HHZ. 2021-01-16T13:22:34.15 0.3 undecidable manual S 26 0.6583 50 0.27 65
IV.CESI.HHZ. 2021-01-16T13:22:31.85 0.6 undecidable manual S 15 0.5819 50 0.24 44
IV.SMA1.EHZ. 2021-01-16T13:22:29.83 0.6 undecidable manual S 68 0.5054 50 0.49 43
IV.NRCA.HHZ. 2021-01-16T13:22:28.69 0.6 undecidable manual S 38 0.4964 50 -0.38 45
IV.RM33.EHZ. 2021-01-16T13:22:26.05 0.6 undecidable manual S 80 0.3858 50 0.23 47
IV.CSP1.EHZ. 2021-01-16T13:22:25.86 0.1 undecidable manual P 30 0.7473 50 -0.1 90
IV.FIAM.HHZ. 2021-01-16T13:22:24.93 0.6 undecidable manual S 119 0.3552 50 0.03 49
IV.FDMO.HHZ. 2021-01-16T13:22:24.19 0.1 undecidable manual P 26 0.6583 50 -0.24 89
IV.MGAB.HHZ. 2021-01-16T13:22:23.97 3.0 undecidable manual P -0.43 0
IV.LNSS.HHZ. 2021-01-16T13:22:22.88 0.6 undecidable manual S 57 0.2986 50 -0.34 47
IV.CESI.HHZ. 2021-01-16T13:22:22.94 0.1 undecidable manual P 15 0.5819 50 -0.18 92
IV.NRCA.HHZ. 2021-01-16T13:22:21.45 0.1 undecidable manual P 38 0.4964 50 -0.21 93
IV.SMA1.EHZ. 2021-01-16T13:22:21.85 0.1 undecidable manual P 68 0.5054 50 0.04 95
IV.SRES.HHZ. 2021-01-16T13:22:21.96 0.6 undecidable manual S 214 0.2482 109 0.33 48
IV.CESX.HHZ. 2021-01-16T13:22:19.26 0.6 undecidable manual S 334 0.1844 114 -0.09 50
IV.FIAM.HHZ. 2021-01-16T13:22:19.21 0.1 undecidable manual P 119 0.3552 50 -0.04 98
IV.RM33.EHZ. 2021-01-16T13:22:19.60 0.1 undecidable manual P 80 0.3858 50 -0.18 95
IV.ARRO.EHZ. 2021-01-16T13:22:18.02 0.3 undecidable manual S 20 0.1448 120 0.04 77
IV.LNSS.HHZ. 2021-01-16T13:22:18.02 0.1 undecidable manual P 57 0.2986 50 -0.26 95
IV.SRES.HHZ. 2021-01-16T13:22:17.52 0.1 undecidable manual P 214 0.2482 109 0.16 99
IV.ARRO.EHZ. 2021-01-16T13:22:15.64 0.1 undecidable manual P 20 0.1448 120 0.39 97
IV.CESX.HHZ. 2021-01-16T13:22:15.95 0.1 undecidable manual P 334 0.1844 114 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1.8 0.0005975 1.2 AML other m 2021-01-16T13:22:18.30
IV.ARRO.EHN. ML:2 0.000904 0.24 AML other m 2021-01-16T13:22:18.45
IV.CESX.HHN. ML:1.6 0.000331 0.4 AML other m 2021-01-16T13:22:19.39
IV.CESX.HHE. ML:1.5 0.0002545 0.48 AML other m 2021-01-16T13:22:21.88
IV.SRES.HHN. ML:1.3 0.0001165 1.46 AML other m 2021-01-16T13:22:23.97
IV.LNSS.HHN. ML:2.3 0.0008385 0.14 AML other m 2021-01-16T13:22:23.51
IV.SRES.HHE. ML:1.5 0.000167 0.38 AML other m 2021-01-16T13:22:23.76
IV.LNSS.HHE. ML:2.2 0.0006865 1.38 AML other m 2021-01-16T13:22:23.99
IV.RM33.EHN. ML:1.7 0.0001605 1.02 AML other m 2021-01-16T13:22:26.39
IV.RM33.EHE. ML:1.8 0.000216 0.96 AML other m 2021-01-16T13:22:26.50
IV.NRCA.HHE. ML:2 0.0002305 0.84 AML other m 2021-01-16T13:22:30.54
IV.FIAM.HHE. ML:1.1 4.43E-5 0.68 AML other m 2021-01-16T13:22:30.88
IV.FIAM.HHN. ML:1.2 5.575E-5 1.02 AML other m 2021-01-16T13:22:30.61
IV.SMA1.EHN. ML:1.7 0.000113 0.42 AML other m 2021-01-16T13:22:30.93
IV.SMA1.EHE. ML:1.9 0.000174 0.24 AML other m 2021-01-16T13:22:30.85
IV.NRCA.HHN. ML:2 0.000234 1.88 AML other m 2021-01-16T13:22:30.04
IV.CESI.HHN. ML:2.1 0.0002285 0.26 AML other m 2021-01-16T13:22:32.33
IV.CESI.HHE. ML:1.9 0.0001615 0.24 AML other m 2021-01-16T13:22:32.36
IV.FDMO.HHN. ML:1.9 0.000125 0.5 AML other m 2021-01-16T13:22:34.51
IV.MGAB.HNE. ML:2.2 0.0002285 1.18 AML other m 2021-01-16T13:22:35.66
IV.MGAB.HNN. ML:2.1 0.000216 0.48 AML other m 2021-01-16T13:22:35.35
IV.FDMO.HHE. ML:2 0.0001655 1.76 AML other m 2021-01-16T13:22:35.11
IV.MGAB.HHN. ML:1.9 0.000122 0.48 AML other m 2021-01-16T13:22:35.35
IV.MGAB.HHE. ML:2 0.0001825 0.66 AML other m 2021-01-16T13:22:37.79
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