Earthquake with magnitude of Md 2.5 on date 01-04-1986 and time 03:19:13 (UTC) in region S Ariccia (RM)

A magnitude Md 2.5 earthquake occured in region: S Ariccia (RM), on

  • 01-04-1986 03:19:13 (UTC)
  • 01-04-1986 05:19:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7170, 12.6720 at 15 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
Ariccia RM 0 19407 19407
Albano Laziale RM 2 41715 61122
Genzano di Roma RM 2 23970 85092
Nemi RM 4 1943 87035
Castel Gandolfo RM 4 8997 96032
Lanuvio RM 5 13632 109664
Rocca di Papa RM 6 17034 126698
Marino RM 6 43026 169724
Grottaferrata RM 8 20327 190051
Velletri RM 9 53303 243354
Frascati RM 10 22087 265441
Ciampino RM 11 38412 303853
Monte Compatri RM 12 11978 315831
Rocca Priora RM 12 11962 327793
Monte Porzio Catone RM 12 8693 336486
Lariano RM 14 13432 349918
Aprilia LT 14 73446 423364
Colonna RM 15 4287 427651
Pomezia RM 15 62966 490617
Ardea RM 16 49183 539800
San Cesareo RM 16 15153 554953
Cisterna di Latina LT 19 36868 591821
Zagarolo RM 19 17843 609664
Labico RM 19 6379 616043

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Velletri (53303 inhabitants)
14 Km N of Aprilia (73446 inhabitants)
15 Km E of Pomezia (62966 inhabitants)
25 Km SE of Roma (2864731 inhabitants)
30 Km SW of Tivoli (56533 inhabitants)
30 Km N of Anzio (54211 inhabitants)
32 Km S of Guidonia Montecelio (88673 inhabitants)
34 Km NW of Latina (125985 inhabitants)
37 Km E of Fiumicino (78395 inhabitants)
84 Km SE of Civitavecchia (52991 inhabitants)
91 Km SE of Viterbo (67173 inhabitants)
93 Km SW of L'Aquila (69753 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
Bulletin
Rev1000
Md 2.5 1986-04-01
03:19:13
41.717 12.672 15 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 25179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-04-01 03:19:13 ± 0.557
Latitude 41.7170 ± 0.0195
Longitude 12.6720 ± 0.0366
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 25179

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) 3730.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 270
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.00761
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 25179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:27:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.AQU.Z. 1986-04-01T03:19:42.00 10.0 undecidable manual SG 40 0.8214 -0.03 0.7
--.MNS.Z. 1986-04-01T03:19:36.80 10.0 undecidable manual SG 0 0.666 0.2 0.7
--.SD1.Z. 1986-04-01T03:19:30.00 10.0 undecidable manual PG 90 0.8436 -0.09 1.7
--.AQU.Z. 1986-04-01T03:19:30.00 10.0 undecidable manual PG 40 0.8214 0.15 1.7
--.MNS.Z. 1986-04-01T03:19:26.00 10.0 undecidable manual PG 0 0.666 -0.72 0.8
--.RMP.Z. 1986-04-01T03:19:19.00 10.0 undecidable manual SG 13 0.0888 -0.17 0.8
--.RDP.Z. 1986-04-01T03:19:18.00 10.0 undecidable manual SG 38 0.0444 -0.39 0.5
--.RMP.Z. 1986-04-01T03:19:17.50 10.0 undecidable manual PG 13 0.0888 0.84 0.7
--.RDP.Z. 1986-04-01T03:19:15.50 10.0 undecidable manual PG 38 0.0444 -0.7 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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