Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 19-12-2020 and time 16:38:58 (Italy) in region 2 km NW Sambuci (RM)

A magnitude ML 1.1 earthquake occured in region: 2 km NW Sambuci (RM), on

  • 19-12-2020 15:38:58 (UTC)
  • 19-12-2020 16:38:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0010, 12.9210 at 9 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
Sambuci RM 2 925 925
Saracinesco RM 3 185 1110
Vicovaro RM 3 4019 5129
Mandela RM 4 917 6046
Ciciliano RM 5 1336 7382
Castel Madama RM 5 7399 14781
Anticoli Corrado RM 6 915 15696
Roccagiovine RM 6 263 15959
San Polo dei Cavalieri RM 7 2992 18951
Cineto Romano RM 7 601 19552
Roviano RM 7 1351 20903
Marano Equo RM 8 779 21682
Cerreto Laziale RM 8 1118 22800
Licenza RM 8 1011 23811
Arsoli RM 9 1586 25397
Agosta RM 10 1765 27162
Riofreddo RM 10 781 27943
Gerano RM 10 1263 29206
Marcellina RM 10 7280 36486
San Gregorio da Sassola RM 10 1619 38105
Rocca Canterano RM 10 196 38301
Percile RM 11 255 38556
Pisoniano RM 11 770 39326
Casape RM 11 744 40070
Tivoli RM 11 56533 96603
Vallinfreda RM 11 283 96886
Oricola AQ 11 1244 98130
Canterano RM 12 351 98481
Cervara di Roma RM 12 455 98936
Rocca di Botte AQ 13 856 99792
Poli RM 13 2418 102210
Rocca Santo Stefano RM 13 975 103185
Vivaro Romano RM 13 182 103367
San Vito Romano RM 14 3273 106640
Monteflavio RM 14 1348 107988
Orvinio RI 15 405 108393
Palombara Sabina RM 15 13269 121662
Capranica Prenestina RM 16 351 122013
Camerata Nuova RM 16 447 122460
Bellegra RM 16 2887 125347
Guidonia Montecelio RM 16 88673 214020
Pereto AQ 16 682 214702
Gallicano nel Lazio RM 17 6334 221036
Turania RI 17 241 221277
Subiaco RM 17 9074 230351
Rocca di Cave RM 17 377 230728
Castel San Pietro Romano RM 17 902 231630
Carsoli AQ 17 5396 237026
Sant'Angelo Romano RM 18 5018 242044
Moricone RM 18 2650 244694
Montorio Romano RM 18 1984 246678
Palestrina RM 18 21672 268350
Olevano Romano RM 18 6687 275037
Pozzaglia Sabina RI 18 360 275397
Roiate RM 18 737 276134
Collalto Sabino RI 19 442 276576
Genazzano RM 19 6036 282612
Zagarolo RM 19 17843 300455
Scandriglia RI 20 3108 303563
Affile RM 20 1548 305111

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)
37 Km NE of Velletri (53303 inhabitants)
38 Km E of Roma (2864731 inhabitants)
50 Km NE of Aprilia (73446 inhabitants)
51 Km NE of Pomezia (62966 inhabitants)
56 Km SW of L'Aquila (69753 inhabitants)
59 Km N of Latina (125985 inhabitants)
62 Km E of Fiumicino (78395 inhabitants)
66 Km NE of Anzio (54211 inhabitants)
66 Km SE of Terni (111501 inhabitants)
82 Km SE of Viterbo (67173 inhabitants)
94 Km E of Civitavecchia (52991 inhabitants)
98 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 1.1 2020-12-19
15:38:58		 42.0008 12.9208 9 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86207601
Reviewed
Rev100 		ML 1.1 2020-12-19
15:38:58		 42 12.9073 10 2020-12-19
15:49:47		 Sala Sismica INGV-Roma 85549701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-19 15:38:58 ± 0.06
Latitude 42.0008 ± 0.0027
Longitude 12.9208 ± 0.0048
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86207601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69158
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85549701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-19 15:49:47

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86207601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-12 17:19:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2020-12-19T15:41:00.49 3.0 undecidable manual Sg 14.2 0
CR.ZAG.BHZ. 2020-12-19T15:40:50.86 3.0 undecidable manual Sn -0.47 0
IV.ERC.EHZ. 2020-12-19T15:40:50.49 3.0 undecidable manual Sg 8.28 0
IV.SPS2.HHZ. 2020-12-19T15:40:46.09 3.0 undecidable manual Sg 8.91 0
IV.MBAL.EHZ. 2020-12-19T15:40:43.09 3.0 undecidable manual Sn 3.01 0
GU.GRAM.HHZ. 2020-12-19T15:40:40.86 3.0 undecidable manual Sg 18.76 0
IV.ENIC.HHZ. 2020-12-19T15:40:17.63 3.0 negative manual Pg 12.23 0
IV.SARZ.HHZ. 2020-12-19T15:40:13.72 3.0 positive manual Pg 17.59 0
IV.ZCCA.HHZ. 2020-12-19T15:40:07.94 3.0 undecidable manual Sn -1.88 0
IV.PIPA.HHZ. 2020-12-19T15:40:03.76 3.0 undecidable manual Pg 9 0
OX.SABO.HNZ. 2020-12-19T15:39:57.97 3.0 undecidable manual Pn 2.73 0
IV.SSFR.HNZ. 2020-12-19T15:39:36.63 3.0 undecidable manual Sn -1.36 0
IV.FOSV.EHZ. 2020-12-19T15:39:36.17 3.0 undecidable manual Sn 1.61 0
IV.VBKN.HHZ. 2020-12-19T15:39:25.41 3.0 positive manual Pg 1.55 0
IV.GAVE.EHZ. 2020-12-19T15:39:21.77 0.3 undecidable manual S 358 76.7676 50 0.34 63
IV.LATB.EHZ. 2020-12-19T15:39:16.17 0.6 undecidable manual S 176 56.2992 50 0.19 45
IV.GIUL.HHZ. 2020-12-19T15:39:16.07 0.6 undecidable manual S 151 56.2992 50 0.09 46
IV.VVLD.HHZ. 2020-12-19T15:39:16.80 0.6 undecidable manual S 104 59.7957 50 -0.1 45
IV.SRES.HHZ. 2020-12-19T15:39:12.72 0.6 undecidable manual S 308 42.7239 50 0.35 44
IV.PTQR.HHZ. 2020-12-19T15:39:11.64 0.6 undecidable manual S 86 39.627 50 0.12 47
IV.GUAR.HHZ. 2020-12-19T15:39:11.57 0.6 undecidable manual S 125 39.627 50 0.05 48
IV.GAVE.EHZ. 2020-12-19T15:39:11.12 0.3 undecidable manual P 358 76.7676 50 -0.42 62
IV.LNSS.HNZ. 2020-12-19T15:39:09.94 1.0 undecidable manual P 8 67.4769 50 -0.18 22
IV.LATB.EHZ. 2020-12-19T15:39:08.63 0.1 undecidable manual P 176 56.2992 50 0.23 89
IV.GIUL.HHZ. 2020-12-19T15:39:08.14 0.6 undecidable manual P 151 56.2992 50 -0.26 44
IT.MMP1.HGZ. 2020-12-19T15:39:08.92 0.6 undecidable manual S 333 30.9468 50 -0.3 46
IV.VVLD.HHZ. 2020-12-19T15:39:08.71 1.0 undecidable manual P 104 59.7957 50 -0.22 22
IV.SRES.HHZ. 2020-12-19T15:39:06.50 0.1 undecidable manual P 308 42.7239 50 0.19 92
IV.PTQR.HHZ. 2020-12-19T15:39:05.54 0.3 undecidable manual P 86 39.627 50 -0.28 68
IT.CSO1.HGZ. 2020-12-19T15:39:05.02 0.3 undecidable manual S 51 17.6712 117 0.09 73
IV.GUAR.HHZ. 2020-12-19T15:39:05.51 0.1 undecidable manual P 125 39.627 50 -0.31 90
IT.MMP1.HGZ. 2020-12-19T15:39:04.60 0.6 undecidable manual P 333 30.9468 50 0.11 48
IV.FIAM.HHZ. 2020-12-19T15:39:04.72 1.0 undecidable manual P 29 33.744 50 -0.2 23
IV.RCAV.EHZ. 2020-12-19T15:39:04.82 0.6 undecidable manual S 173 17.1717 118 0.06 49
IV.MTCE.HHZ. 2020-12-19T15:39:03.86 0.3 undecidable manual S 279 14.874 121 -0.22 72
IV.RMP.HHZ. 2020-12-19T15:39:03.50 0.6 undecidable manual P 220 27.5502 108 -0.33 46
IV.RCAV.EHZ. 2020-12-19T15:39:02.22 0.3 undecidable manual P 173 17.1717 118 0.3 70
IT.CSO1.HGZ. 2020-12-19T15:39:02.20 0.1 undecidable manual P 51 17.6712 117 0.19 96
IV.MTCE.HHZ. 2020-12-19T15:39:01.54 0.1 undecidable manual P 279 14.874 121 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHN. ML:1.1 0.00011643496 0.2816 AML other m 2020-12-19T15:39:04.28
IV.MTCE.HHE. ML:1.6 0.00039912075 1.68 AML other m 2020-12-19T15:39:04.15
IV.PTQR.HHE. ML:1.1 0.000043494235 0.3456 AML other m 2020-12-19T15:39:13.44
IV.PTQR.HHN. ML:1.2 0.00004756361 0.2176 AML other m 2020-12-19T15:39:13.76
IV.GIUL.HHN. ML:0.8 0.000016951295 0.2176 AML other m 2020-12-19T15:39:18.48
IV.GIUL.HHE. ML:0.8 0.000016264510000000004 0.1792 AML other m 2020-12-19T15:39:20.87
IV.VVLD.HHE. ML:1.1 0.000024554285000000002 0.3584 AML other m 2020-12-19T15:39:21.48
IV.GAVE.EHN. ML:1.2 0.000026768235 0.2816 AML other m 2020-12-19T15:39:22.60
IV.GAVE.EHE. ML:1.3 0.00003081699 0.2688 AML other m 2020-12-19T15:39:25.32
IV.VVLD.HHN. ML:1.0 0.000020366719999999997 1.5392 AML other m 2020-12-19T15:39:29.23
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