Earthquake with magnitude of Md 3.1 on date 08-07-1985 and time 11:21:05 (Italy) in region 3 km NW Gallicano nel Lazio (RM)

A magnitude Md 3.1 earthquake occured in region: 3 km NW Gallicano nel Lazio (RM), on

  • 08-07-1985 09:21:05 (UTC)
  • 08-07-1985 11:21:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.88, 12.8 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gallicano nel Lazio RM 3 6334 6334
Zagarolo RM 6 17843 24177
Colonna RM 7 4287 28464
San Cesareo RM 7 15153 43617
San Gregorio da Sassola RM 7 1619 45236
Casape RM 8 744 45980
Poli RM 8 2418 48398
Tivoli RM 9 56533 104931
Castel San Pietro Romano RM 9 902 105833
Palestrina RM 9 21672 127505
Monte Compatri RM 10 11978 139483
Monte Porzio Catone RM 10 8693 148176
Rocca Priora RM 10 11962 160138
Castel Madama RM 12 7399 167537
Frascati RM 13 22087 189624
Rocca di Cave RM 13 377 190001
Labico RM 13 6379 196380
Capranica Prenestina RM 13 351 196731
Cave RM 13 11287 208018
Pisoniano RM 14 770 208788
Guidonia Montecelio RM 14 88673 297461
San Polo dei Cavalieri RM 15 2992 300453
Ciciliano RM 15 1336 301789
Grottaferrata RM 15 20327 322116
Rocca di Papa RM 15 17034 339150
San Vito Romano RM 16 3273 342423
Marcellina RM 16 7280 349703
Valmontone RM 16 15959 365662
Genazzano RM 16 6036 371698
Sambuci RM 16 925 372623
Vicovaro RM 17 4019 376642
Cerreto Laziale RM 17 1118 377760
Marino RM 17 43026 420786
Gerano RM 17 1263 422049
Lariano RM 18 13432 435481
Sant'Angelo Romano RM 18 5018 440499
Ciampino RM 19 38412 478911
Saracinesco RM 19 185 479096
Artena RM 19 14276 493372
Rocca Santo Stefano RM 19 975 494347
Bellegra RM 19 2887 497234
Fonte Nuova RM 19 32562 529796
Nemi RM 19 1943 531739
Castel Gandolfo RM 20 8997 540736
Mandela RM 20 917 541653
Olevano Romano RM 20 6687 548340

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km S of Tivoli (56533 inhabitants)
14 Km SE of Guidonia Montecelio (88673 inhabitants)
22 Km N of Velletri (53303 inhabitants)
26 Km E of Roma (2864731 inhabitants)
34 Km NE of Pomezia (62966 inhabitants)
35 Km NE of Aprilia (73446 inhabitants)
47 Km N of Latina (125985 inhabitants)
48 Km E of Fiumicino (78395 inhabitants)
50 Km N of Anzio (54211 inhabitants)
72 Km SW of L'Aquila (69753 inhabitants)
76 Km S of Terni (111501 inhabitants)
82 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
Rev 1000 Md 3.1 1985-07-08
09:21:05
41.89 12.8 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 9829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-08 09:21:05 ± 0.334
Latitude 41.89 ± 0.02
Longitude 12.80 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 9829

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) 3666.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.01198
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 9829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MA1.Z. 1985-07-08T09:21:49.00 10.0 undecidable manual SN 294 0.0119 1.07 0.4
--.AS1.Z. 1985-07-08T09:21:46.00 10.0 undecidable manual SN 354 0.0106 1.56 0.3
--.DUI.Z. 1985-07-08T09:21:31.00 10.0 undecidable manual PN 99 0.0113 1.82 0.5
--.CM2.Z. 1985-07-08T09:21:31.00 10.0 undecidable manual PN 10 0.012 0.82 1.3
--.SD1.Z. 1985-07-08T09:21:31.50 10.0 undecidable manual SG 102 0.007 -1.15 0.5
--.MA1.Z. 1985-07-08T09:21:30.50 10.0 undecidable manual PN 294 0.0119 0.35 1.6
--.PO9.Z. 1985-07-08T09:21:30.00 10.0 undecidable manual SG 8 0.0062 -0.16 0.9
--.AS1.Z. 1985-07-08T09:21:27.00 10.0 undecidable manual PN 354 0.0106 -1.13 1.1
--.ALP.Z. 1985-07-08T09:21:27.80 10.0 undecidable manual PN 32 0.0095 1.33 1
--.MNS.Z. 1985-07-08T09:21:23.00 10.0 undecidable manual SG 350 0.0045 -1.05 0.6
--.SD1.Z. 1985-07-08T09:21:20.00 10.0 undecidable manual PG 102 0.007 -1.32 1.1
--.PO9.Z. 1985-07-08T09:21:19.00 10.0 undecidable manual PG 8 0.0062 -0.89 1.6
--.AQU.Z. 1985-07-08T09:21:19.50 10.0 undecidable manual PG 43 0.0058 0.52 2
--.MNS.Z. 1985-07-08T09:21:15.00 10.0 undecidable manual PG 350 0.0045 -1.36 1
--.RDP.Z. 1985-07-08T09:21:10.50 10.0 undecidable manual SG 205 0.0012 -1.76 0.3
--.RDP.Z. 1985-07-08T09:21:10.00 10.0 undecidable manual PG 205 0.0012 0.45 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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