Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.5 on date 06-11-1997 and time 03:20:26 (Italy) in region 2 km E Marcellina (RM)

A magnitude Md 3.5 earthquake occured in region: 2 km E Marcellina (RM), on

  • 06-11-1997 02:20:26 (UTC)
  • 06-11-1997 03:20:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.031, 12.827 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.

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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
Marcellina RM 2 7280 7280
San Polo dei Cavalieri RM 2 2992 10272
Vicovaro RM 6 4019 14291
Roccagiovine RM 6 263 14554
Palombara Sabina RM 7 13269 27823
Castel Madama RM 7 7399 35222
Tivoli RM 8 56533 91755
Licenza RM 8 1011 92766
Mandela RM 8 917 93683
Guidonia Montecelio RM 9 88673 182356
Monteflavio RM 9 1348 183704
Sant'Angelo Romano RM 9 5018 188722
Percile RM 10 255 188977
Sambuci RM 10 925 189902
Moricone RM 11 2650 192552
Saracinesco RM 11 185 192737
Cineto Romano RM 12 601 193338
Montorio Romano RM 12 1984 195322
Ciciliano RM 12 1336 196658
San Gregorio da Sassola RM 13 1619 198277
Montelibretti RM 14 5323 203600
Anticoli Corrado RM 14 915 204515
Roviano RM 14 1351 205866
Casape RM 15 744 206610
Orvinio RI 15 405 207015
Riofreddo RM 15 781 207796
Nerola RM 15 1926 209722
Scandriglia RI 15 3108 212830
Vallinfreda RM 15 283 213113
Mentana RM 16 22921 236034
Arsoli RM 16 1586 237620
Cerreto Laziale RM 16 1118 238738
Marano Equo RM 16 779 239517
Vivaro Romano RM 17 182 239699
Poli RM 17 2418 242117
Pisoniano RM 17 770 242887
Fonte Nuova RM 18 32562 275449
Gerano RM 18 1263 276712
Monterotondo RM 18 40830 317542
Oricola AQ 18 1244 318786
Agosta RM 18 1765 320551
Gallicano nel Lazio RM 18 6334 326885
Pozzaglia Sabina RI 18 360 327245
Rocca Canterano RM 18 196 327441
Turania RI 19 241 327682
Poggio Moiano RI 20 2751 330433

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NE of Tivoli (56533 inhabitants)
9 Km E of Guidonia Montecelio (88673 inhabitants)
32 Km E of Roma (2864731 inhabitants)
38 Km N of Velletri (53303 inhabitants)
48 Km NE of Pomezia (62966 inhabitants)
51 Km N of Aprilia (73446 inhabitants)
57 Km NE of Fiumicino (78395 inhabitants)
59 Km SW of L'Aquila (69753 inhabitants)
61 Km S of Terni (111501 inhabitants)
63 Km N of Latina (125985 inhabitants)
67 Km N of Anzio (54211 inhabitants)
73 Km SE of Viterbo (67173 inhabitants)
86 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 3.5
MLNET 3.7 		1997-11-06
02:20:26		 42.031 12.827 2 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 310089
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-11-06 02:20:26 ± 0.171
Latitude 42.0310 ± 0.0073
Longitude 12.8270 ± 0.0130
Depth (km) 2 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 310089

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) 1346.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.03092
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

Md:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 310089
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:50:55

ML:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 310089
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BRT.Z. 1997-11-06T02:21:22.24 10.0 undecidable manual PN 108 0.0309 1.11 0.2
--.ARV.Z. 1997-11-06T02:21:14.79 10.0 undecidable manual SN 3 0.0132 0.55 0.4
--.GU9.Z. 1997-11-06T02:21:14.18 10.0 undecidable manual PN 325 0.0255 1.31 0.1
--.MGR.Z. 1997-11-06T02:21:12.92 10.0 undecidable manual PN 131 0.0251 0.62 0.6
--.BDI.Z. 1997-11-06T02:21:10.12 10.0 undecidable manual PN 321 0.0234 0.44 0.7
--.SNTG.Z. 1997-11-06T02:21:09.00 10.0 undecidable manual SN 3 0.011 0.55 0.4
--.PII.Z. 1997-11-06T02:21:06.57 10.0 undecidable manual PN 315 0.0215 -0.15 0.9
--.MU9.Z. 1997-11-06T02:21:06.42 10.0 undecidable manual PN 121 0.0212 0 1
--.SGO.Z. 1997-11-06T02:21:06.65 10.0 undecidable manual PN 127 0.0213 0.12 1
--.RFI.Z. 1997-11-06T02:21:06.83 10.0 undecidable manual SN 129 0.0101 0.63 0.3
--.CRVI.Z. 1997-11-06T02:21:05.93 10.0 undecidable manual SN 105 0.0103 -0.54 0.4
--.ASS.Z. 1997-11-06T02:21:02.99 10.0 undecidable manual SG 352 0.0093 -0.44 0.4
--.PLI2.Z. 1997-11-06T02:21:02.79 10.0 undecidable manual SG 118 0.0094 -0.83 0.2
--.SFI.Z. 1997-11-06T02:21:02.25 10.0 undecidable manual PN 339 0.018 0.78 0.5
--.CI9.Z. 1997-11-06T02:21:01.66 10.0 undecidable manual PN 124 0.0181 -0.01 1.1
--.FG5.Z. 1997-11-06T02:21:00.71 10.0 undecidable manual PN 111 0.0177 -0.28 1
--.MRB1.Z. 1997-11-06T02:20:59.43 10.0 undecidable manual PN 118 0.0165 0.22 1.1
--.FG2.Z. 1997-11-06T02:20:58.94 10.0 undecidable manual PN 96 0.0157 0.96 0.4
--.CRE.Z. 1997-11-06T02:20:58.17 10.0 undecidable manual PN 338 0.0154 0.71 0.7
--.CSNT.Z. 1997-11-06T02:20:57.94 10.0 undecidable manual PN 322 0.0164 -1.12 0.3
--.FB9.Z. 1997-11-06T02:20:57.93 10.0 undecidable manual PN 358 0.0149 1.18 0.2
--.SMB1.Z. 1997-11-06T02:20:56.69 10.0 undecidable manual PN 113 0.0139 1.49 0.1
--.VTB1.Z. 1997-11-06T02:20:55.33 10.0 undecidable manual PN 121 0.0142 -0.47 0.9
--.NRCA.Z. 1997-11-06T02:20:55.75 10.0 undecidable manual SG 14 0.0074 -0.95 0.2
--.ARV.Z. 1997-11-06T02:20:54.43 10.0 negative manual PN 3 0.0132 0.3 2.3
--.MAB1.Z. 1997-11-06T02:20:53.92 10.0 undecidable manual PN 121 0.0131 -0.15 1.3
--.BAI2.Z. 1997-11-06T02:20:52.82 10.0 undecidable manual PN 111 0.0125 -0.19 1.3
--.SNTG.Z. 1997-11-06T02:20:50.30 10.0 positive manual PN 3 0.011 -0.75 1.4
--.RFI.Z. 1997-11-06T02:20:49.42 10.0 positive manual PN 129 0.0101 -0.06 2.7
--.CPI2.Z. 1997-11-06T02:20:49.14 10.0 undecidable manual PN 111 0.0108 -1.24 0.2
--.CRVI.Z. 1997-11-06T02:20:48.96 10.0 positive manual PN 105 0.0103 -0.68 1.5
--.PLI2.Z. 1997-11-06T02:20:47.97 10.0 positive manual PG 118 0.0094 -0.02 2.7
--.ASS.Z. 1997-11-06T02:20:47.00 10.0 positive manual PG 352 0.0093 -0.88 1
--.AQU.Z. 1997-11-06T02:20:46.81 10.0 undecidable manual SG 52 0.0048 -0.42 0.4
--.PQ9.Z. 1997-11-06T02:20:44.40 10.0 undecidable manual SG 90 0.0038 0.98 0.2
--.NRCA.Z. 1997-11-06T02:20:43.40 10.0 positive manual PG 14 0.0074 -0.96 0.9
--.SDI.Z. 1997-11-06T02:20:43.72 10.0 positive manual PG 113 0.0071 0.28 2.5
--.MNS.Z. 1997-11-06T02:20:41.83 10.0 undecidable manual SG 342 0.0033 0.93 0.2
--.AQU.Z. 1997-11-06T02:20:38.38 10.0 positive manual PG 52 0.0048 -0.15 2.6
--.PQ9.Z. 1997-11-06T02:20:36.24 10.0 positive manual PG 90 0.0038 0.12 2.6
--.RDP.Z. 1997-11-06T02:20:36.87 10.0 undecidable manual SG 196 0.0025 -0.76 0.3
--.MNS.Z. 1997-11-06T02:20:35.26 10.0 negative manual PG 342 0.0033 0.38 2.3
--.RMP.Z. 1997-11-06T02:20:35.37 10.0 undecidable manual SG 202 0.0021 -0.49 0.4
--.RDP.Z. 1997-11-06T02:20:32.88 10.0 positive manual PG 196 0.0025 -0.11 2.7
--.RMP.Z. 1997-11-06T02:20:31.93 10.0 positive manual PG 202 0.0021 -0.03 2.7
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