Earthquake with magnitude of Md 3.0 on date 23-12-1986 and time 09:11:42 (Italy) in region 1 km E Nemi (RM)

A magnitude Md 3.0 earthquake occured in region: 1 km E Nemi (RM), on

  • 23-12-1986 08:11:42 (UTC)
  • 23-12-1986 09:11:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.72, 12.73 at 6 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
Nemi RM 1 1943 1943
Genzano di Roma RM 3 23970 25913
Ariccia RM 5 19407 45320
Rocca di Papa RM 5 17034 62354
Lanuvio RM 5 13632 75986
Velletri RM 6 53303 129289
Albano Laziale RM 6 41715 171004
Castel Gandolfo RM 7 8997 180001
Marino RM 8 43026 223027
Lariano RM 9 13432 236459
Rocca Priora RM 9 11962 248421
Grottaferrata RM 9 20327 268748
Monte Compatri RM 10 11978 280726
Frascati RM 10 22087 302813
Monte Porzio Catone RM 11 8693 311506
San Cesareo RM 13 15153 326659
Colonna RM 13 4287 330946
Ciampino RM 14 38412 369358
Labico RM 15 6379 375737
Aprilia LT 16 73446 449183
Artena RM 16 14276 463459
Zagarolo RM 16 17843 481302
Cisterna di Latina LT 16 36868 518170
Rocca Massima LT 17 1136 519306
Valmontone RM 17 15959 535265
Cori LT 18 11065 546330
Gallicano nel Lazio RM 18 6334 552664
Palestrina RM 19 21672 574336
Ardea RM 20 49183 623519
Pomezia RM 20 62966 686485
Castel San Pietro Romano RM 20 902 687387

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km NW of Velletri (53303 inhabitants)
16 Km NE of Aprilia (73446 inhabitants)
20 Km E of Pomezia (62966 inhabitants)
28 Km S of Tivoli (56533 inhabitants)
28 Km SE of Roma (2864731 inhabitants)
31 Km S of Guidonia Montecelio (88673 inhabitants)
31 Km N of Anzio (54211 inhabitants)
32 Km NW of Latina (125985 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
88 Km E of Civitavecchia (52991 inhabitants)
89 Km SW of L'Aquila (69753 inhabitants)
93 Km SE of Viterbo (67173 inhabitants)
94 Km S of Terni (111501 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 3.0 1986-12-23
08:11:42
41.72 12.73 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 38509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-12-23 08:11:42 ± 0.59
Latitude 41.72 ± 0.03
Longitude 12.73 ± 0.04
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 38509

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) 4698.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.01206
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 38509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:38:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AQU.Z. 1986-12-23T08:12:12.00 10.0 undecidable manual SG 38 0.0072 0.48 0.5
--.SD1.Z. 1986-12-23T08:12:11.00 10.0 undecidable manual SG 90 0.0072 -0.54 0.5
--.DUI.Z. 1986-12-23T08:12:08.50 10.0 undecidable manual PN 92 0.0116 1.14 0.2
--.ASS.Z. 1986-12-23T08:12:07.50 10.0 undecidable manual PN 357 0.0121 -0.55 0.9
--.AQU.Z. 1986-12-23T08:11:59.50 10.0 undecidable manual PG 38 0.0072 0.09 1.8
--.SD1.Z. 1986-12-23T08:11:58.80 10.0 undecidable manual PG 90 0.0072 -0.62 1
--.RMP.Z. 1986-12-23T08:11:47.00 10.0 undecidable manual SG 347 0.0008 0.1 1.1
--.RMP.Z. 1986-12-23T08:11:45.20 10.0 undecidable manual PG 347 0.0008 0 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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