Earthquake with magnitude of Md 2.4 on date 05-03-1987 and time 06:54:42 (Italy) in region 6 km S Leonessa (RI)

A magnitude Md 2.4 earthquake occured in region: 6 km S Leonessa (RI), on

  • 05-03-1987 05:54:42 (UTC)
  • 05-03-1987 06:54:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.51, 12.98 at 5 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
Leonessa RI 6 2435 2435
Poggio Bustone RI 8 2055 4490
Cantalice RI 8 2755 7245
Micigliano RI 9 127 7372
Posta RI 9 694 8066
Rivodutri RI 11 1253 9319
Borbona RI 12 617 9936
Morro Reatino RI 13 373 10309
Antrodoco RI 13 2588 12897
Borgo Velino RI 13 972 13869
Castel Sant'Angelo RI 14 1308 15177
Polino TR 14 233 15410
Cittaducale RI 14 6828 22238
Labro RI 15 374 22612
Rieti RI 16 47698 70310
Monteleone di Spoleto PG 16 599 70909
Colli sul Velino RI 17 533 71442
Cittareale RI 19 482 71924
Greccio RI 19 1558 73482
Arrone TR 19 2763 76245

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Terni (111501 inhabitants)
38 Km W of L'Aquila (69753 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
61 Km NE of Guidonia Montecelio (88673 inhabitants)
61 Km W of Teramo (54892 inhabitants)
63 Km N of Tivoli (56533 inhabitants)
73 Km E of Viterbo (67173 inhabitants)
80 Km NE of Roma (2864731 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
93 Km N of Velletri (53303 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
99 Km W of Chieti (51815 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 2.4 1987-03-05
05:54:42
42.51 12.99 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 42419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-03-05 05:54:42 ± 0.508
Latitude 42.51 ± 0.03
Longitude 12.99 ± 0.06
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 42419

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) 5967.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.00907
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 42419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:42:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-03-05T05:55:18.00 10.0 undecidable manual SG 358 0.0088 0.63 0.5
--.SD1.Z. 1987-03-05T05:55:16.50 10.0 undecidable manual SG 142 0.0091 -1.61 0.1
--.ASS.Z. 1987-03-05T05:55:05.50 10.0 undecidable manual SG 336 0.0053 0.49 0.7
--.SD1.Z. 1987-03-05T05:55:04.00 10.0 undecidable manual PG 142 0.0091 0.8 1
--.ARV.Z. 1987-03-05T05:55:02.00 10.0 undecidable manual PG 358 0.0088 -0.77 1
--.AQU.Z. 1987-03-05T05:54:56.00 10.0 undecidable manual SG 117 0.0031 -0.27 0.8
--.ASS.Z. 1987-03-05T05:54:55.50 10.0 undecidable manual PG 336 0.0053 -0.14 2.1
--.AQU.Z. 1987-03-05T05:54:51.00 10.0 undecidable manual PG 117 0.0031 0.41 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download