Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 26-12-2019 and time 05:07:44 (UTC) in region 3 km S Velletri (RM)

A magnitude ML 1.9 earthquake occured in region: 3 km S Velletri (RM), on

  • 26-12-2019 05:07:44 (UTC)
  • 26-12-2019 06:07:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.6560, 12.7820 at 11 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
Velletri RM 3 53303 53303
Lanuvio RM 7 13632 66935
Cisterna di Latina LT 8 36868 103803
Lariano RM 9 13432 117235
Nemi RM 9 1943 119178
Genzano di Roma RM 9 23970 143148
Cori LT 11 11065 154213
Ariccia RM 12 19407 173620
Rocca Massima LT 12 1136 174756
Albano Laziale RM 13 41715 216471
Aprilia LT 13 73446 289917
Rocca di Papa RM 13 17034 306951
Artena RM 15 14276 321227
Castel Gandolfo RM 15 8997 330224
Rocca Priora RM 16 11962 342186
Marino RM 16 43026 385212
Labico RM 17 6379 391591
Monte Compatri RM 17 11978 403569
Grottaferrata RM 18 20327 423896
Valmontone RM 18 15959 439855
Norma LT 18 3946 443801
San Cesareo RM 19 15153 458954
Monte Porzio Catone RM 19 8693 467647
Frascati RM 19 22087 489734
Colonna RM 20 4287 494021

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km S of Velletri (53303 inhabitants)
13 Km NE of Aprilia (73446 inhabitants)
23 Km E of Pomezia (62966 inhabitants)
23 Km NW of Latina (125985 inhabitants)
26 Km NE of Anzio (54211 inhabitants)
34 Km S of Tivoli (56533 inhabitants)
36 Km SE of Roma (2864731 inhabitants)
39 Km S of Guidonia Montecelio (88673 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
93 Km SW of L'Aquila (69753 inhabitants)
95 Km SE 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 1.9 2019-12-26
05:07:44		 41.6565 12.7817 11 2020-02-28
16:42:16		 Bollettino Sismico Italiano INGV 75017361
Reviewed
Rev100 		ML 2.0 2019-12-26
05:07:44		 41.6573 12.7733 11 2019-12-26
05:19:14		 Sala Sismica INGV-Roma 74985871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-26 05:07:44 ± 0.06
Latitude 41.6565 ± 0.0036
Longitude 12.7817 ± 0.0060
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75017361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 547
Semi-minor axis of confidence ellipse (meter) 317
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.06565
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 75017361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-27 09:47:16

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 74985871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-26 05:19:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHZ. 2019-12-26T05:08:05.22 0.3 undecidable manual S 91 66.6777 50 0.31 64
IV.GUAR.HHE. 2019-12-26T05:07:59.41 0.3 undecidable manual S 71 46.5201 50 -0.11 71
IV.GIUL.HHZ. 2019-12-26T05:07:58.03 0.3 undecidable manual S 105 40.7259 50 0.06 71
IV.MTCE.HHE. 2019-12-26T05:07:57.94 0.3 undecidable manual S 355 40.7259 50 -0.04 72
IV.LRP.EHZ. 2019-12-26T05:07:56.36 0.1 undecidable manual P 91 66.6777 50 0.03 92
IV.CERT.HHN. 2019-12-26T05:07:56.94 0.3 undecidable manual S 27 36.4413 50 0.12 71
IV.LATB.EHZ. 2019-12-26T05:07:53.03 0.3 undecidable manual S 140 23.4543 50 -0.33 69
IV.RCAV.EHZ. 2019-12-26T05:07:53.76 0.3 undecidable manual S 33 25.1526 50 -0.05 74
IV.MTCE.HHE. 2019-12-26T05:07:52.15 0.1 undecidable manual P 355 40.7259 50 -0.18 93
IV.GIUL.HHZ. 2019-12-26T05:07:52.32 0.1 positive manual P 105 40.7259 50 0 97
IV.SAMA.EHZ. 2019-12-26T05:07:52.62 0.6 undecidable manual S 311 20.868 50 -0.04 49
IV.GUAR.HHE. 2019-12-26T05:07:52.88 0.1 undecidable manual P 71 46.5201 50 -0.34 90
IV.RMP.HHZ. 2019-12-26T05:07:52.12 0.3 undecidable manual S 339 18.3705 50 0.12 74
IV.CERT.HHN. 2019-12-26T05:07:51.57 0.1 undecidable manual P 27 36.4413 50 -0.09 96
IV.MA9.HHZ. 2019-12-26T05:07:51.00 0.3 undecidable manual S 321 16.1727 124 -0.39 69
IV.RDP.HHZ. 2019-12-26T05:07:50.55 0.3 undecidable manual S 333 12.9759 130 0.05 76
IV.RCAV.EHZ. 2019-12-26T05:07:50.23 0.1 undecidable manual P 33 25.1526 50 0.31 93
IV.SAMA.EHZ. 2019-12-26T05:07:49.26 0.1 undecidable manual P 311 20.868 50 0 99
IV.RMP.HHZ. 2019-12-26T05:07:49.11 0.3 undecidable manual P 339 18.3705 50 0.23 72
IV.LATB.EHZ. 2019-12-26T05:07:49.68 0.1 negative manual P 140 23.4543 50 0.02 99
IV.LAV9.HHZ. 2019-12-26T05:07:49.20 0.3 undecidable manual S 289 7.2927 147 0.02 76
IV.VIVA.HHZ. 2019-12-26T05:07:49.67 0.3 undecidable manual S 355 10.4784 136 -0.2 74
IV.MA9.HHZ. 2019-12-26T05:07:48.21 0.1 undecidable manual P 321 16.1727 124 -0.32 94
IV.RDP.HHZ. 2019-12-26T05:07:48.32 0.3 undecidable manual P 333 12.9759 130 0.3 72
IV.LAV9.HHZ. 2019-12-26T05:07:47.63 0.1 undecidable manual P 289 7.2927 147 0.38 96
IV.VIVA.HHZ. 2019-12-26T05:07:47.77 0.1 positive manual P 355 10.4784 136 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VIVA.HHE. ML:2.3 0.002407191 1.6576 AML other m 2019-12-26T05:07:50.03
IV.LAV9.HNE. ML:2.2 0.0021826932499999997 0.3904 AML other m 2019-12-26T05:07:50.87
IV.LAV9.HHE. ML:2.1 0.0019285079999999998 1.5392 AML other m 2019-12-26T05:07:51.87
IV.LAV9.HNN. ML:2.2 0.0022660715000000003 0.368 AML other m 2019-12-26T05:07:51.37
IV.LAV9.HHN. ML:2.2 0.002333431 0.3776 AML other m 2019-12-26T05:07:51.37
IV.RDP.HHN. ML:2.0 0.0009923009 0.3616 AML other m 2019-12-26T05:07:51.66
IV.RDP.HHE. ML:1.8 0.0006775362 0.3776 AML other m 2019-12-26T05:07:53.39
IV.RMP.HHE. ML:2.0 0.0008608046 0.2592 AML other m 2019-12-26T05:07:54.02
IV.RCAV.EHN. ML:1.3 0.00010697639500000001 0.2624 AML other m 2019-12-26T05:07:54.89
IV.RMP.HHN. ML:2.1 0.0009176139 0.2592 AML other m 2019-12-26T05:07:54.99
IV.GIUL.HHE. ML:1.1 0.00004081921 0.3584 AML other m 2019-12-26T05:07:59.71
IV.GIUL.HHN. ML:1.3 0.000063988365 0.2208 AML other m 2019-12-26T05:08:00.11
IV.LRP.EHE. ML:1.3 0.000036051775000000004 0.2592 AML other m 2019-12-26T05:08:06.54
IV.LRP.EHN. ML:0.8 0.00001133758 0.1984 AML other m 2019-12-26T05:08:07.81
IV.VIVA.HHN. ML:2.2 0.001651722 0.2816 AML other m 2019-12-26T05:07:52.10
IV.RCAV.EHE. ML:1.4 0.0001287684 0.3168 AML other m 2019-12-26T05:07:56.88
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
Waveforms Seismic signals in miniseed + resp format Download