Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 23-01-2021 and time 14:09:56 (Italy) in region 1 km SE Vicovaro (RM)

A magnitude ML 1.9 earthquake occured in region: 1 km SE Vicovaro (RM), on

  • 23-01-2021 13:09:56 (UTC)
  • 23-01-2021 14:09:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42, 12.9 at 10 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
Vicovaro RM 2 4019 4019
Sambuci RM 4 925 4944
Mandela RM 4 917 5861
Saracinesco RM 4 185 6046
Castel Madama RM 4 7399 13445
Roccagiovine RM 5 263 13708
San Polo dei Cavalieri RM 5 2992 16700
Ciciliano RM 6 1336 18036
Cineto Romano RM 7 601 18637
Anticoli Corrado RM 7 915 19552
Licenza RM 8 1011 20563
Roviano RM 8 1351 21914
Marcellina RM 8 7280 29194
Cerreto Laziale RM 9 1118 30312
Marano Equo RM 10 779 31091
Tivoli RM 10 56533 87624
San Gregorio da Sassola RM 10 1619 89243
Percile RM 10 255 89498
Riofreddo RM 10 781 90279
Arsoli RM 10 1586 91865
Casape RM 11 744 92609
Gerano RM 11 1263 93872
Agosta RM 11 1765 95637
Rocca Canterano RM 11 196 95833
Pisoniano RM 12 770 96603
Vallinfreda RM 12 283 96886
Oricola AQ 12 1244 98130
Poli RM 13 2418 100548
Canterano RM 13 351 100899
Palombara Sabina RM 13 13269 114168
Monteflavio RM 13 1348 115516
Cervara di Roma RM 14 455 115971
Vivaro Romano RM 14 182 116153
Rocca di Botte AQ 14 856 117009
Rocca Santo Stefano RM 15 975 117984
Guidonia Montecelio RM 15 88673 206657
Orvinio RI 15 405 207062
San Vito Romano RM 15 3273 210335
Sant'Angelo Romano RM 16 5018 215353
Gallicano nel Lazio RM 16 6334 221687
Capranica Prenestina RM 16 351 222038
Moricone RM 16 2650 224688
Montorio Romano RM 17 1984 226672
Camerata Nuova RM 17 447 227119
Bellegra RM 17 2887 230006
Turania RI 17 241 230247
Pereto AQ 18 682 230929
Castel San Pietro Romano RM 18 902 231831
Rocca di Cave RM 18 377 232208
Carsoli AQ 18 5396 237604
Pozzaglia Sabina RI 18 360 237964
Palestrina RM 18 21672 259636
Subiaco RM 19 9074 268710
Scandriglia RI 19 3108 271818
Collalto Sabino RI 19 442 272260
Olevano Romano RM 19 6687 278947
Zagarolo RM 19 17843 296790
Roiate RM 20 737 297527
Montelibretti RM 20 5323 302850
Nerola RM 20 1926 304776
Genazzano RM 20 6036 310812

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km E of Tivoli (56533 inhabitants)
15 Km E of Guidonia Montecelio (88673 inhabitants)
37 Km E of Roma (2864731 inhabitants)
37 Km N of Velletri (53303 inhabitants)
50 Km NE of Pomezia (62966 inhabitants)
50 Km NE of Aprilia (73446 inhabitants)
56 Km SW of L'Aquila (69753 inhabitants)
60 Km N of Latina (125985 inhabitants)
61 Km E of Fiumicino (78395 inhabitants)
65 Km SE of Terni (111501 inhabitants)
66 Km NE of Anzio (54211 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
92 Km E of Civitavecchia (52991 inhabitants)
98 Km SW of Teramo (54892 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 2021-01-23
13:09:56		 42 12.9 10 2021-01-23
13:19:49		 Sala Sismica INGV-Roma 86496771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-23 13:09:56 ± 0.08
Latitude 42.00 ± 0.00
Longitude 12.90 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86496771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 308
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.70237
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 24
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 86496771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-23 13:19:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SACR.HHZ. 2021-01-23T13:10:43.42 3.0 undecidable manual S 0.54 0
IV.SGRT.HHZ. 2021-01-23T13:10:31.22 3.0 negative manual Pn -0.1 0
IV.PTRJ.HNZ. 2021-01-23T13:10:22.05 3.0 undecidable manual P 1.1 0
IV.LRP.EHZ. 2021-01-23T13:10:17.58 0.6 undecidable manual S 125 0.6214 50 0.5 42
IV.GIUL.HHZ. 2021-01-23T13:10:14.00 0.6 undecidable manual S 149 0.5171 50 0.02 47
IV.VVLD.HHZ. 2021-01-23T13:10:14.79 0.6 undecidable manual S 104 0.5522 50 -0.22 45
IV.LATB.EHZ. 2021-01-23T13:10:13.81 0.6 undecidable manual S 175 0.5126 50 -0.03 47
IV.SMA1.EHZ. 2021-01-23T13:10:10.51 0.3 undecidable manual P 27 0.7024 50 0.97 51
IV.GIGS.HHZ. 2021-01-23T13:10:10.31 1.0 undecidable manual P 48 0.6682 50 1.35 14
IV.PTQR.HHZ. 2021-01-23T13:10:10.02 0.6 undecidable manual S 87 0.3696 50 0.42 45
IV.GUAR.HHZ. 2021-01-23T13:10:09.70 0.6 undecidable manual S 125 0.3696 50 0.09 48
IV.T0110.HHZ. 2021-01-23T13:10:09.25 0.3 undecidable manual P 71 0.6853 50 0 69
IV.SAMA.EHZ. 2021-01-23T13:10:08.74 0.6 undecidable manual S 226 0.322 50 0.54 44
IV.CESX.HHZ. 2021-01-23T13:10:08.80 0.3 undecidable manual P 339 0.6466 50 0.2 66
IV.POFI.HNE. 2021-01-23T13:10:08.58 0.3 undecidable manual P 115 0.6673 50 -0.36 64
IV.BARO.EHE. 2021-01-23T13:10:08.24 0.6 undecidable manual P 291 0.6763 50 -0.87 35
IV.VIVA.HHZ. 2021-01-23T13:10:07.09 0.6 undecidable manual S 201 0.2734 50 0.35 46
IV.ARRO.EHE. 2021-01-23T13:10:07.75 0.3 undecidable manual P 350 0.5828 50 0.25 67
IV.FIAM.HHZ. 2021-01-23T13:10:07.75 0.6 undecidable manual S 31 0.3067 50 0 49
IV.LRP.EHZ. 2021-01-23T13:10:07.88 0.3 undecidable manual P 125 0.6214 50 -0.29 65
IV.LNSS.HHZ. 2021-01-23T13:10:07.68 0.3 undecidable manual P 10 0.6061 50 -0.22 67
IV.GIUL.HHZ. 2021-01-23T13:10:06.08 0.3 undecidable manual P 149 0.5171 50 -0.31 67
IV.VVLD.HHZ. 2021-01-23T13:10:06.68 0.1 undecidable manual P 104 0.5522 50 -0.3 89
IV.RM33.EHZ. 2021-01-23T13:10:06.17 0.6 undecidable manual P 24 0.554 50 -0.84 37
IT.MMP1.HGE. 2021-01-23T13:10:06.27 0.6 undecidable manual S 335 0.2698 50 -0.38 46
IV.LATB.EHZ. 2021-01-23T13:10:05.94 0.3 undecidable manual P 175 0.5126 50 -0.36 66
IV.SAMA.EHZ. 2021-01-23T13:10:03.51 0.3 undecidable manual P 226 0.322 50 0.47 67
IV.SRES.HHZ. 2021-01-23T13:10:03.72 0.3 undecidable manual P 309 0.3723 50 -0.19 70
IV.PTQR.HHZ. 2021-01-23T13:10:03.75 0.1 undecidable manual P 87 0.3696 50 -0.11 96
IV.GUAR.HHZ. 2021-01-23T13:10:03.67 0.3 undecidable manual P 125 0.3696 50 -0.19 70
IT.CSO1.HGE. 2021-01-23T13:10:03.53 0.6 undecidable manual S 55 0.1673 119 0.17 49
IV.RCAV.EHZ. 2021-01-23T13:10:02.80 0.6 undecidable manual S 169 0.161 120 -0.34 47
IV.VIVA.HHZ. 2021-01-23T13:10:02.14 0.3 undecidable manual P 201 0.2734 50 -0.06 74
IV.FIAM.HHZ. 2021-01-23T13:10:02.92 0.3 undecidable manual P 31 0.3067 50 0.14 72
IT.MMP1.HGE. 2021-01-23T13:10:01.90 0.3 undecidable manual P 335 0.2698 50 -0.25 71
IV.RMP.HHZ. 2021-01-23T13:10:01.99 0.3 undecidable manual P 217 0.2428 50 0.3 71
IV.MTCE.HHZ. 2021-01-23T13:10:01.74 0.3 undecidable manual S 279 0.1214 127 -0.13 75
IV.RCAV.EHZ. 2021-01-23T13:10:00.27 0.3 undecidable manual P 169 0.161 120 0.14 74
IT.CSO1.HGE. 2021-01-23T13:10:00.51 0.1 undecidable manual P 55 0.1673 119 0.25 96
IV.MTCE.HHZ. 2021-01-23T13:09:59.51 0.1 undecidable manual P 279 0.1214 127 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:2.2 0.001755 0.34 AML other m 2021-01-23T13:10:02.06
IV.MTCE.HHN. ML:1.7 0.00059094965 0.256 AML other m 2021-01-23T13:10:02.47
IV.RCAV.EHN. ML:2.2 0.001192012 0.1792 AML other m 2021-01-23T13:10:03.80
IV.RCAV.EHE. ML:2.1 0.0010485 0.4 AML other m 2021-01-23T13:10:05.66
IV.FIAM.HHN. ML:1.6 0.00018066505 0.4032 AML other m 2021-01-23T13:10:09.14
IV.VIVA.HHE. ML:2.3 0.00093943085 0.2624 AML other m 2021-01-23T13:10:10.47
IV.FIAM.HNN. ML:2 0.0003855 0.52 AML other m 2021-01-23T13:10:10.47
IV.PTQR.HHN. ML:1.9 0.000285 0.3 AML other m 2021-01-23T13:10:10.65
IV.GUAR.HHE. ML:2.1 0.0003918754 0.4032 AML other m 2021-01-23T13:10:11.19
IV.GUAR.HHN. ML:2.1 0.0003777308 0.2176 AML other m 2021-01-23T13:10:11.94
IV.PTQR.HHE. ML:2 0.000299 0.4 AML other m 2021-01-23T13:10:11.97
IV.FIAM.HHE. ML:1.6 0.0001535 0.6 AML other m 2021-01-23T13:10:13.21
IV.VIVA.HHN. ML:2.4 0.001364203 0.4032 AML other m 2021-01-23T13:10:14.05
IV.LRP.EHE. ML:1.8 0.00012201954 0.4416 AML other m 2021-01-23T13:10:25.35
IV.LRP.EHN. ML:1.4 3.7616035E-5 0.2048 AML other m 2021-01-23T13:10:18.63
IV.VVLD.HHE. ML:1.7 0.000104603825 0.4352 AML other m 2021-01-23T13:10:22.76
IV.VVLD.HNN. ML:1.9 0.00017022105 0.4608 AML other m 2021-01-23T13:10:23.48
IV.VVLD.HHN. ML:1.9 0.0001463545 0.3776 AML other m 2021-01-23T13:10:22.45
IV.VVLD.HNE. ML:1.8 0.0001421442 0.7808 AML other m 2021-01-23T13:10:26.26
IV.GIUL.HHE. ML:1.7 0.00010242494 0.1984 AML other m 2021-01-23T13:10:18.25
IV.GIUL.HHN. ML:1.7 0.00011124518 0.1408 AML other m 2021-01-23T13:10:16.78
IV.LNSS.HHE. ML:1.8 0.00010745065 0.2624 AML other m 2021-01-23T13:10:24.83
IV.LNSS.HHN. ML:1.8 0.000110619255 0.256 AML other m 2021-01-23T13:10:21.94
IV.LNSS.HNE. ML:1.9 0.00012869006 0.32 AML other m 2021-01-23T13:10:21.51
IV.CESX.HHE. ML:2 0.000147230535 0.4224 AML other m 2021-01-23T13:10:21.80
IV.CESX.HHN. ML:1.9 0.00014185195 0.32 AML other m 2021-01-23T13:10:20.52
IV.T0110.HHE. ML:2 0.00015733971 0.5632 AML other m 2021-01-23T13:10:28.92
IV.T0110.HHN. ML:2 0.00015912885 0.48 AML other m 2021-01-23T13:10:26.47
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