Earthquake with magnitude of Md 3.3 on date 16-02-1999 and time 23:57:36 (Italy) in region 2 km N Tivoli (RM)

A magnitude Md 3.3 earthquake occured in region: 2 km N Tivoli (RM), on

  • 16-02-1999 22:57:36 (UTC)
  • 16-02-1999 23:57:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.983, 12.792 at 2 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Tivoli RM 2 56533 56533
Marcellina RM 5 7280 63813
San Polo dei Cavalieri RM 5 2992 66805
Guidonia Montecelio RM 6 88673 155478
Castel Madama RM 6 7399 162877
Sant'Angelo Romano RM 9 5018 167895
Vicovaro RM 9 4019 171914
Palombara Sabina RM 10 13269 185183
San Gregorio da Sassola RM 10 1619 186802
Casape RM 12 744 187546
Roccagiovine RM 12 263 187809
Sambuci RM 12 925 188734
Mandela RM 12 917 189651
Ciciliano RM 13 1336 190987
Gallicano nel Lazio RM 13 6334 197321
Poli RM 14 2418 199739
Saracinesco RM 14 185 199924
Licenza RM 14 1011 200935
Mentana RM 14 22921 223856
Fonte Nuova RM 14 32562 256418
Monteflavio RM 15 1348 257766
Moricone RM 15 2650 260416
Percile RM 16 255 260671
Pisoniano RM 16 770 261441
Zagarolo RM 16 17843 279284
Cineto Romano RM 16 601 279885
Cerreto Laziale RM 16 1118 281003
Monterotondo RM 16 40830 321833
Anticoli Corrado RM 17 915 322748
Colonna RM 17 4287 327035
Montorio Romano RM 17 1984 329019
Castel San Pietro Romano RM 17 902 329921
Montelibretti RM 18 5323 335244
Roviano RM 18 1351 336595
Gerano RM 18 1263 337858
Palestrina RM 18 21672 359530
San Cesareo RM 18 15153 374683
Marano Equo RM 19 779 375462
Capranica Prenestina RM 19 351 375813
Riofreddo RM 19 781 376594
San Vito Romano RM 19 3273 379867
Rocca Canterano RM 20 196 380063
Monte Porzio Catone RM 20 8693 388756
Arsoli RM 20 1586 390342
Rocca di Cave RM 20 377 390719
Monte Compatri RM 20 11978 402697
Agosta RM 20 1765 404462
Nerola RM 20 1926 406388

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km N of Tivoli (56533 inhabitants)
6 Km E of Guidonia Montecelio (88673 inhabitants)
27 Km E of Roma (2864731 inhabitants)
33 Km N of Velletri (53303 inhabitants)
42 Km NE of Pomezia (62966 inhabitants)
45 Km N of Aprilia (73446 inhabitants)
52 Km E of Fiumicino (78395 inhabitants)
58 Km N of Latina (125985 inhabitants)
61 Km N of Anzio (54211 inhabitants)
65 Km SW of L'Aquila (69753 inhabitants)
65 Km S of Terni (111501 inhabitants)
74 Km SE of Viterbo (67173 inhabitants)
83 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
Md 3.3
ML-VAX 1.7
1999-02-16
22:57:36
41.983 12.792 3 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 359689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-02-16 22:57:36 ± 0.196
Latitude 41.9830 ± 0.0106
Longitude 12.7920 ± 0.0194
Depth (km) 3 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 359689

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1985.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.0153
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 359689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:37:16

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 359689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1999-02-16T22:58:15.77 10.0 undecidable manual SG 354 0.0097 1.41 0
--.RFI.Z. 1999-02-16T22:58:14.94 10.0 undecidable manual SN 126 0.01 -0.51 0.3
--.NRCA.Z. 1999-02-16T22:58:08.71 10.0 undecidable manual SG 15 0.0079 0.81 0.2
--.FB9.Z. 1999-02-16T22:58:07.26 10.0 undecidable manual PN 359 0.0153 0.34 0.7
--.MAB1.Z. 1999-02-16T22:58:04.83 10.0 undecidable manual PN 118 0.0131 1.25 0.1
--.SNTG.Z. 1999-02-16T22:58:00.75 10.0 undecidable manual PN 4 0.0114 -0.23 1
--.RFI.Z. 1999-02-16T22:57:58.39 10.0 undecidable manual PN 126 0.01 -0.48 0.8
--.ASS.Z. 1999-02-16T22:57:57.65 10.0 positive manual PG 354 0.0097 -0.6 1.3
--.PQ9.Z. 1999-02-16T22:57:53.48 10.0 undecidable manual SG 84 0.004 -0.26 0.5
--.NRCA.Z. 1999-02-16T22:57:53.55 10.0 undecidable manual PG 15 0.0079 -0.98 0.3
--.MNS.Z. 1999-02-16T22:57:53.50 10.0 undecidable manual SG 348 0.0036 1.46 0
--.AQU.Z. 1999-02-16T22:57:48.98 10.0 undecidable manual PG 50 0.0052 -0.02 1.4
--.PQ9.Z. 1999-02-16T22:57:46.47 10.0 negative manual PG 84 0.004 0.13 2.7
--.MNS.Z. 1999-02-16T22:57:45.29 10.0 negative manual PG 348 0.0036 -0.07 2.8
--.RDP.Z. 1999-02-16T22:57:45.84 10.0 undecidable manual SG 193 0.002 0.63 0.3
--.RMP.Z. 1999-02-16T22:57:44.21 10.0 undecidable manual SG 201 0.0016 0.8 0.2
--.RDP.Z. 1999-02-16T22:57:41.25 10.0 positive manual PG 193 0.002 -0.17 2.7
--.RMP.Z. 1999-02-16T22:57:40.17 10.0 negative manual PG 201 0.0016 -0.2 2.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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