Earthquake with magnitude of ML 1.9 on date 22-01-2021 and time 23:39:44 (Italy) in region 2 km W Saracinesco (RM)

A magnitude ML 1.9 earthquake occured in region: 2 km W Saracinesco (RM), on

  • 22-01-2021 22:39:44 (UTC)
  • 22-01-2021 23:39:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.01, 12.92 at 8 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
Saracinesco RM 2 185 185
Mandela RM 3 917 1102
Sambuci RM 3 925 2027
Vicovaro RM 3 4019 6046
Roccagiovine RM 5 263 6309
Ciciliano RM 5 1336 7645
Anticoli Corrado RM 6 915 8560
Cineto Romano RM 6 601 9161
Castel Madama RM 6 7399 16560
Roviano RM 6 1351 17911
San Polo dei Cavalieri RM 7 2992 20903
Licenza RM 8 1011 21914
Marano Equo RM 8 779 22693
Arsoli RM 9 1586 24279
Riofreddo RM 9 781 25060
Cerreto Laziale RM 9 1118 26178
Agosta RM 9 1765 27943
Percile RM 10 255 28198
Marcellina RM 10 7280 35478
Gerano RM 10 1263 36741
Rocca Canterano RM 10 196 36937
Vallinfreda RM 10 283 37220
Oricola AQ 11 1244 38464
San Gregorio da Sassola RM 11 1619 40083
Pisoniano RM 12 770 40853
Tivoli RM 12 56533 97386
Casape RM 12 744 98130
Canterano RM 12 351 98481
Cervara di Roma RM 12 455 98936
Rocca di Botte AQ 12 856 99792
Vivaro Romano RM 12 182 99974
Rocca Santo Stefano RM 14 975 100949
Poli RM 14 2418 103367
Monteflavio RM 14 1348 104715
Orvinio RI 14 405 105120
Palombara Sabina RM 15 13269 118389
San Vito Romano RM 15 3273 121662
Camerata Nuova RM 15 447 122109
Pereto AQ 16 682 122791
Turania RI 16 241 123032
Guidonia Montecelio RM 16 88673 211705
Capranica Prenestina RM 16 351 212056
Carsoli AQ 16 5396 217452
Bellegra RM 17 2887 220339
Pozzaglia Sabina RI 17 360 220699
Moricone RM 17 2650 223349
Subiaco RM 17 9074 232423
Montorio Romano RM 17 1984 234407
Gallicano nel Lazio RM 18 6334 240741
Sant'Angelo Romano RM 18 5018 245759
Collalto Sabino RI 18 442 246201
Rocca di Cave RM 18 377 246578
Castel San Pietro Romano RM 18 902 247480
Olevano Romano RM 19 6687 254167
Scandriglia RI 19 3108 257275
Roiate RM 19 737 258012
Palestrina RM 19 21672 279684
Affile RM 20 1548 281232
Genazzano RM 20 6036 287268

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Tivoli (56533 inhabitants)
16 Km E of Guidonia Montecelio (88673 inhabitants)
38 Km NE of Velletri (53303 inhabitants)
39 Km E of Roma (2864731 inhabitants)
51 Km NE of Pomezia (62966 inhabitants)
51 Km NE of Aprilia (73446 inhabitants)
55 Km SW of L'Aquila (69753 inhabitants)
60 Km N of Latina (125985 inhabitants)
63 Km E of Fiumicino (78395 inhabitants)
66 Km SE of Terni (111501 inhabitants)
67 Km NE of Anzio (54211 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
94 Km E of Civitavecchia (52991 inhabitants)
97 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 2021-01-22
22:39:44
42.01 12.92 8 2021-01-22
22:52:50
Sala Sismica INGV-Roma 86472591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 22:39:44 ± 0.11
Latitude 42.01 ± 0.01
Longitude 12.92 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86472591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 750
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 11
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) 0.51531
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:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86472591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 22:52:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VOBA.HNZ. 2021-01-22T22:41:35.24 3.0 undecidable manual Sn 2.62 0
IV.NDIM.HHZ. 2021-01-22T22:41:24.81 3.0 undecidable manual Sg 11.77 0
IV.CRE.HHZ. 2021-01-22T22:40:36.71 3.0 undecidable manual Sn -0.47 0
IV.CIGN.HHZ. 2021-01-22T22:40:19.03 3.0 undecidable manual Pg 5.52 0
IV.CSP1.EHZ. 2021-01-22T22:40:16.56 3.0 undecidable manual S -5.86 0
IV.PTRJ.HNZ. 2021-01-22T22:40:12.84 3.0 undecidable manual P 1.48 0
IV.LATB.EHZ. 2021-01-22T22:40:02.73 0.1 undecidable manual S 177 0.5153 50 -0.37 90
IV.LRP.EHZ. 2021-01-22T22:39:59.51 3.0 positive manual P 0 0
IV.T0110.HHZ. 2021-01-22T22:39:59.64 3.0 undecidable manual P -0.51 0
IV.SAMA.EHZ. 2021-01-22T22:39:58.02 0.1 undecidable manual S 227 0.3363 50 0.24 96
IV.GAVE.EHZ. 2021-01-22T22:39:57.97 3.0 negative manual P -0.28 0
IV.LNSS.HHZ. 2021-01-22T22:39:56.35 3.0 undecidable manual P -0.69 0
IV.FIAM.HHE. 2021-01-22T22:39:56.64 0.6 undecidable manual S 29 0.2959 104 0.22 49
IV.LATB.EHZ. 2021-01-22T22:39:54.90 0.6 positive manual P 177 0.5153 50 -0.42 45
IV.SAMA.EHZ. 2021-01-22T22:39:52.51 0.1 undecidable manual P 227 0.3363 50 0.26 96
IV.FIAM.HHE. 2021-01-22T22:39:51.39 0.1 undecidable manual P 29 0.2959 104 -0.08 100
IV.RCAV.EHZ. 2021-01-22T22:39:51.51 0.3 undecidable manual S 174 0.1628 114 -0.05 77
IT.MMP1.HGZ. 2021-01-22T22:39:50.76 0.6 undecidable manual P 332 0.2734 105 -0.22 49
IV.MTCE.HHZ. 2021-01-22T22:39:50.34 0.3 undecidable manual S 276 0.1358 118 -0.29 74
IV.MTCE.HHZ. 2021-01-22T22:39:48.23 0.6 positive manual P 276 0.1358 118 0.1 51
IV.RCAV.EHZ. 2021-01-22T22:39:48.96 0.1 undecidable manual P 174 0.1628 114 0.3 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:2 0.000973 0.38 AML other m 2021-01-22T22:39:50.69
IV.MTCE.HHN. ML:1.8 0.0006065 0.38 AML other m 2021-01-22T22:39:50.53
IV.RCAV.EHN. ML:2 0.000893 0.22 AML other m 2021-01-22T22:39:52.53
IV.RCAV.EHE. ML:2 0.0009885 0.36 AML other m 2021-01-22T22:39:53.54
IV.LNSS.HHN. ML:1.8 0.00010875 0.36 AML other m 2021-01-22T22:40:10.54
IV.LNSS.HHE. ML:1.9 0.0001307 1.52 AML other m 2021-01-22T22:40:11.86
IV.LRP.EHE. ML:2.2 0.0002975 0.42 AML other m 2021-01-22T22:40:18.81
IV.LRP.EHN. ML:1.8 9.985E-5 0.38 AML other m 2021-01-22T22:40:19.71
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