Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 19-12-2020 and time 16:25:58 (UTC) in region 2 km S Mandela (RM)

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

  • 19-12-2020 16:25:58 (UTC)
  • 19-12-2020 17:25:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0140, 12.9200 at 10 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.

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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
Mandela RM 2 917 917
Vicovaro RM 2 4019 4936
Saracinesco RM 3 185 5121
Sambuci RM 3 925 6046
Roccagiovine RM 4 263 6309
Cineto Romano RM 6 601 6910
Castel Madama RM 6 7399 14309
Anticoli Corrado RM 6 915 15224
Ciciliano RM 6 1336 16560
Roviano RM 6 1351 17911
San Polo dei Cavalieri RM 7 2992 20903
Licenza RM 7 1011 21914
Marano Equo RM 8 779 22693
Riofreddo RM 9 781 23474
Arsoli RM 9 1586 25060
Percile RM 9 255 25315
Cerreto Laziale RM 9 1118 26433
Marcellina RM 9 7280 33713
Agosta RM 10 1765 35478
Vallinfreda RM 10 283 35761
Oricola AQ 11 1244 37005
Rocca Canterano RM 11 196 37201
Gerano RM 11 1263 38464
San Gregorio da Sassola RM 11 1619 40083
Tivoli RM 11 56533 96616
Vivaro Romano RM 12 182 96798
Pisoniano RM 12 770 97568
Casape RM 12 744 98312
Rocca di Botte AQ 12 856 99168
Canterano RM 13 351 99519
Cervara di Roma RM 13 455 99974
Monteflavio RM 13 1348 101322
Orvinio RI 13 405 101727
Palombara Sabina RM 14 13269 114996
Poli RM 14 2418 117414
Rocca Santo Stefano RM 14 975 118389
San Vito Romano RM 16 3273 121662
Camerata Nuova RM 16 447 122109
Turania RI 16 241 122350
Pereto AQ 16 682 123032
Guidonia Montecelio RM 16 88673 211705
Carsoli AQ 16 5396 217101
Montorio Romano RM 17 1984 219085
Moricone RM 17 2650 221735
Pozzaglia Sabina RI 17 360 222095
Capranica Prenestina RM 17 351 222446
Bellegra RM 17 2887 225333
Sant'Angelo Romano RM 17 5018 230351
Collalto Sabino RI 17 442 230793
Gallicano nel Lazio RM 18 6334 237127
Subiaco RM 18 9074 246201
Scandriglia RI 18 3108 249309
Castel San Pietro Romano RM 19 902 250211
Rocca di Cave RM 19 377 250588
Olevano Romano RM 19 6687 257275
Palestrina RM 20 21672 278947
Roiate RM 20 737 279684
Nerola RM 20 1926 281610

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km E of Tivoli (56533 inhabitants)
16 Km E of Guidonia Montecelio (88673 inhabitants)
38 Km NE of Velletri (53303 inhabitants)
38 Km E of Roma (2864731 inhabitants)
52 Km NE of Pomezia (62966 inhabitants)
52 Km NE of Aprilia (73446 inhabitants)
55 Km SW of L'Aquila (69753 inhabitants)
61 Km N of Latina (125985 inhabitants)
63 Km E of Fiumicino (78395 inhabitants)
65 Km SE of Terni (111501 inhabitants)
67 Km NE of Anzio (54211 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
93 Km E of Civitavecchia (52991 inhabitants)
97 Km SW of Teramo (54892 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 2020-12-19
16:25:58		 42.0142 12.9198 10 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86207841
Reviewed
Rev100 		ML 1.5 2020-12-19
16:25:58		 42.0138 12.9143 10 2020-12-19
16:34:08		 Sala Sismica INGV-Roma 85551091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-19 16:25:58 ± 0.05
Latitude 42.0142 ± 0.0027
Longitude 12.9198 ± 0.0036
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86207841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 207
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 6
Circular confidence region, given by single value of horizontal uncertainty (meter) 210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83007
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 85551091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-19 16:34:08

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86207841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-12 17:33:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-12-19T16:26:23.16 3.0 undecidable manual P 0.63 0
IV.GAVE.EHZ. 2020-12-19T16:26:21.38 0.6 undecidable manual S 358 75.2691 50 0.38 42
IV.GIUL.HHZ. 2020-12-19T16:26:16.35 0.6 undecidable manual S 151 57.6978 50 0.06 46
IV.VVLD.HHZ. 2020-12-19T16:26:16.88 0.3 undecidable manual S 105 60.1953 50 -0.1 68
IV.MOMA.HHZ. 2020-12-19T16:26:13.80 0.6 undecidable manual P 342 92.1411 50 -0.16 42
IV.SRES.HHZ. 2020-12-19T16:26:12.08 0.3 undecidable manual S 306 41.8248 50 0.01 72
IV.GAVE.EHZ. 2020-12-19T16:26:11.22 0.6 undecidable manual P 358 75.2691 50 -0.14 44
IV.PTQR.HHZ. 2020-12-19T16:26:11.75 0.6 undecidable manual S 89 39.627 50 0.26 46
IV.GUAR.HHZ. 2020-12-19T16:26:11.75 0.3 undecidable manual S 127 40.5261 50 0.02 72
IV.SAMA.EHZ. 2020-12-19T16:26:10.97 0.6 undecidable manual S 226 37.4292 50 0.06 48
IV.FIAM.HHZ. 2020-12-19T16:26:09.46 0.6 undecidable manual S 30 32.5452 50 -0.12 48
IV.VVLD.HHZ. 2020-12-19T16:26:08.83 0.3 undecidable manual P 105 60.1953 50 -0.21 67
IV.GIUL.HHZ. 2020-12-19T16:26:08.25 0.6 undecidable manual P 151 57.6978 50 -0.39 43
IT.MMP1.HGZ. 2020-12-19T16:26:08.70 0.3 undecidable manual S 332 29.6481 50 -0.12 72
IV.GUAR.HHZ. 2020-12-19T16:26:05.83 0.1 undecidable manual P 127 40.5261 50 -0.18 93
IV.SAMA.EHZ. 2020-12-19T16:26:05.90 0.6 undecidable manual P 226 37.4292 50 0.37 45
IV.RCAV.EHZ. 2020-12-19T16:26:05.41 0.6 undecidable manual S 174 18.6702 118 -0.1 49
IV.SRES.HHZ. 2020-12-19T16:26:05.90 0.6 undecidable manual P 306 41.8248 50 -0.31 45
IT.CSO1.HGZ. 2020-12-19T16:26:05.13 0.3 undecidable manual S 55 16.872 120 0.15 73
IV.PTQR.HHZ. 2020-12-19T16:26:05.73 0.3 undecidable manual P 89 39.627 50 -0.14 71
IV.RDP.HHZ. 2020-12-19T16:26:05.19 0.6 undecidable manual P 212 33.0447 50 0.34 46
IV.RMP.HHZ. 2020-12-19T16:26:04.40 0.6 undecidable manual P 218 28.5492 50 0.23 47
IV.MTCE.HHZ. 2020-12-19T16:26:04.10 0.3 undecidable manual S 274 14.6742 124 -0.23 72
IT.MMP1.HGZ. 2020-12-19T16:26:04.51 0.6 undecidable manual P 332 29.6481 50 0.18 47
IV.VIVA.HHZ. 2020-12-19T16:26:04.76 0.6 undecidable manual P 203 31.746 50 0.11 48
IV.FIAM.HHZ. 2020-12-19T16:26:04.77 0.1 undecidable manual P 30 32.5452 50 0 98
IT.CSO1.HGZ. 2020-12-19T16:26:02.36 0.6 undecidable manual P 55 16.872 120 0.25 48
IV.RCAV.EHZ. 2020-12-19T16:26:02.48 0.3 undecidable manual P 174 18.6702 118 0.06 74
IV.MTCE.HHZ. 2020-12-19T16:26:01.79 0.1 undecidable manual P 274 14.6742 124 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHN. ML:1.5 0.000335 0.36 AML other m 2020-12-19T16:26:04.54
IV.MTCE.HHE. ML:1.9 0.0008435 0.32 AML other m 2020-12-19T16:26:04.38
IV.FIAM.HHE. ML:1.3 0.00009379999999999999 1.38 AML other m 2020-12-19T16:26:09.26
IV.PTQR.HHN. ML:1.6 0.000134 0.3 AML other m 2020-12-19T16:26:12.51
IV.PTQR.HHE. ML:1.6 0.0001285 0.18 AML other m 2020-12-19T16:26:12.61
IV.FIAM.HHN. ML:1.4 0.00010300000000000001 1 AML other m 2020-12-19T16:26:12.12
IV.SRES.HHN. ML:1.3 0.00007165 0.3 AML other m 2020-12-19T16:26:13.73
IV.GUAR.HHE. ML:1.8 0.000209 0.96 AML other m 2020-12-19T16:26:13.90
IV.GUAR.HHN. ML:1.6 0.000147 0.3 AML other m 2020-12-19T16:26:17.12
IV.GIUL.HHN. ML:1.4 0.00004885 0.98 AML other m 2020-12-19T16:26:18.64
IV.VVLD.HHN. ML:1.4 0.0000564 0.9 AML other m 2020-12-19T16:26:18.19
IV.SRES.HHE. ML:1.3 0.00006785 0.94 AML other m 2020-12-19T16:26:18.32
IV.GIUL.HHE. ML:1.4 0.00005184999999999999 0.82 AML other m 2020-12-19T16:26:21.14
IV.VVLD.HHE. ML:1.4 0.000052449999999999994 0.38 AML other m 2020-12-19T16:26:21.95
IV.MOMA.HHE. ML:1.6 0.000040050000000000004 0.66 AML other m 2020-12-19T16:26:27.63
IV.MOMA.HHN. ML:1.6 0.00004425 0.28 AML other m 2020-12-19T16:26:31.37
IV.EL6.EHE. ML:1.8 0.00003315 0.42 AML other m 2020-12-19T16:26:48.01
IV.EL6.EHN. ML:1.8 0.000029760000000000003 0.42 AML other m 2020-12-19T16:27:00.21
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