Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-10-2021 and time 00:22:59 (UTC) in region 2 km N Roviano (RM)

A magnitude ML 1.5 earthquake occured in region: 2 km N Roviano (RM), on

  • 16-10-2021 00:22:59 (UTC)
  • 16-10-2021 02:22:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0430, 12.9930 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Roviano RM 2 1351 1351
Arsoli RM 2 1586 2937
Riofreddo RM 2 781 3718
Cineto Romano RM 3 601 4319
Anticoli Corrado RM 4 915 5234
Oricola AQ 4 1244 6478
Vallinfreda RM 5 283 6761
Saracinesco RM 5 185 6946
Marano Equo RM 6 779 7725
Mandela RM 6 917 8642
Rocca di Botte AQ 7 856 9498
Vivaro Romano RM 7 182 9680
Agosta RM 7 1765 11445
Sambuci RM 8 925 12370
Roccagiovine RM 8 263 12633
Licenza RM 8 1011 13644
Cervara di Roma RM 9 455 14099
Vicovaro RM 9 4019 18118
Percile RM 9 255 18373
Pereto AQ 9 682 19055
Carsoli AQ 10 5396 24451
Ciciliano RM 10 1336 25787
Camerata Nuova RM 10 447 26234
Rocca Canterano RM 10 196 26430
Turania RI 11 241 26671
Cerreto Laziale RM 11 1118 27789
Orvinio RI 11 405 28194
Collalto Sabino RI 12 442 28636
Canterano RM 12 351 28987
Gerano RM 12 1263 30250
Castel Madama RM 13 7399 37649
San Polo dei Cavalieri RM 13 2992 40641
Pozzaglia Sabina RI 13 360 41001
Nespolo RI 14 246 41247
Rocca Santo Stefano RM 15 975 42222
Pisoniano RM 15 770 42992
Collegiove RI 15 213 43205
Marcellina RM 15 7280 50485
Monteflavio RM 15 1348 51833
Subiaco RM 16 9074 60907
Paganico Sabino RI 16 172 61079
San Gregorio da Sassola RM 17 1619 62698
Ascrea RI 17 234 62932
Casape RM 17 744 63676
San Vito Romano RM 18 3273 66949
Bellegra RM 18 2887 69836
Tivoli RM 18 56533 126369
Scandriglia RI 19 3108 129477
Sante Marie AQ 19 1166 130643
Montorio Romano RM 19 1984 132627
Palombara Sabina RM 19 13269 145896
Poli RM 19 2418 148314
Colle di Tora RI 19 372 148686
Affile RM 20 1548 150234
Castel di Tora RI 20 288 150522
Roiate RM 20 737 151259
Moricone RM 20 2650 153909

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Tivoli (56533 inhabitants)
22 Km E of Guidonia Montecelio (88673 inhabitants)
43 Km NE of Velletri (53303 inhabitants)
45 Km E of Roma (2864731 inhabitants)
48 Km SW of L'Aquila (69753 inhabitants)
57 Km NE of Aprilia (73446 inhabitants)
58 Km NE of Pomezia (62966 inhabitants)
64 Km N of Latina (125985 inhabitants)
64 Km SE of Terni (111501 inhabitants)
69 Km E of Fiumicino (78395 inhabitants)
73 Km NE of Anzio (54211 inhabitants)
84 Km SE of Viterbo (67173 inhabitants)
90 Km SW of Teramo (54892 inhabitants)
99 Km E of Civitavecchia (52991 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.5 2021-10-16
00:22:59		 42.0427 12.993 5 2022-03-30
13:04:14		 Bollettino Sismico Italiano INGV 97269401
Reviewed
Rev100 		ML 1.5 2021-10-16
00:22:59		 42.0458 12.9943 3 2021-10-16
00:29:07		 Sala Sismica INGV-Roma 96630321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-16 00:22:59 ± 0.07
Latitude 42.0427 ± 0.0036
Longitude 12.9930 ± 0.0048
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97269401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 223
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) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.42538
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97269401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-05 08:26:49

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96630321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-16 00:29:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SRES.HHZ. 2021-10-16T00:23:15.13 0.6 undecidable manual S 299 45.2214 97 0.24 46
IV.VIVA.HHZ. 2021-10-16T00:23:12.89 0.6 undecidable manual S 210 37.3293 98 0.73 40
IV.PTQR.HHZ. 2021-10-16T00:23:10.93 0.6 undecidable manual S 94 33.6441 99 0.01 49
IT.MMP1.HGE. 2021-10-16T00:23:09.54 0.6 undecidable manual S 319 30.5472 100 -0.29 46
IV.FIAM.HNN. 2021-10-16T00:23:08.81 0.6 undecidable manual S 22 27.0507 101 0.17 48
IV.SRES.HHZ. 2021-10-16T00:23:08.14 0.3 undecidable manual P 299 45.2214 97 -0.07 71
IV.LAV9.HHZ. 2021-10-16T00:23:08.44 0.6 undecidable manual P 211 47.2194 50 -0.08 47
IV.RCAV.EHZ. 2021-10-16T00:23:07.10 0.6 undecidable manual S 190 22.0668 104 0.15 49
IV.MTCE.HHZ. 2021-10-16T00:23:06.56 0.3 undecidable manual S 264 20.7681 104 0.03 75
IV.VIVA.HHZ. 2021-10-16T00:23:06.91 0.6 undecidable manual P 210 37.3293 98 0.27 46
IV.PTQR.HHZ. 2021-10-16T00:23:05.56 0.3 undecidable manual P 94 33.6441 99 -0.36 68
IT.MMP1.HGE. 2021-10-16T00:23:05.48 0.6 undecidable manual P 319 30.5472 100 0.19 48
IV.FIAM.HNN. 2021-10-16T00:23:04.37 0.3 undecidable manual P 22 27.0507 101 -0.24 71
IV.MTCE.HHZ. 2021-10-16T00:23:03.18 0.1 undecidable manual P 264 20.7681 104 -0.21 96
IT.CSO1.HGZ. 2021-10-16T00:23:03.46 0.6 undecidable manual S 50 10.1787 118 0.39 47
IV.RCAV.EHZ. 2021-10-16T00:23:03.57 0.1 undecidable manual P 190 22.0668 104 -0.06 99
IV.CERT.HHZ. 2021-10-16T00:23:02.93 0.3 undecidable manual S 185 10.3785 117 -0.22 73
IT.CSO1.HGZ. 2021-10-16T00:23:01.65 0.3 undecidable manual P 50 10.1787 118 0.26 73
IV.CERT.HHZ. 2021-10-16T00:23:01.33 0.1 negative manual P 185 10.3785 117 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERT.HNN. ML:1.5 0.000453116675 0.14 AML other m 2021-10-16T00:23:03.68
IV.CERT.HHN. ML:1.5 0.0005309007300000001 0.14 AML other m 2021-10-16T00:23:03.69
IV.MTCE.HHN. ML:1.3 0.0001465 0.28 AML other m 2021-10-16T00:23:07.16
IV.MTCE.HHE. ML:1.2 0.0001275 0.92 AML other m 2021-10-16T00:23:07.75
IV.RCAV.EHE. ML:1.6 0.00026726165000000003 0.34 AML other m 2021-10-16T00:23:07.78
IV.RCAV.EHN. ML:1.5 0.000249 0.44 AML other m 2021-10-16T00:23:08.60
IV.PTQR.HHN. ML:1.0 0.000046313345 0.2 AML other m 2021-10-16T00:23:11.69
IV.PTQR.HHE. ML:1.1 0.00005425605 0.46 AML other m 2021-10-16T00:23:13.70
IV.VIVA.HHN. ML:1.7 0.00017986385 0.38 AML other m 2021-10-16T00:23:13.32
IV.VIVA.HHE. ML:1.7 0.0002065 0.42 AML other m 2021-10-16T00:23:15.26
IV.LAV9.HHN. ML:1.9 0.00020907565 0.74 AML other m 2021-10-16T00:23:21.26
IV.LAV9.HNN. ML:1.9 0.00021785545 0.76 AML other m 2021-10-16T00:23:25.72
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download