Earthquake with magnitude of Md 3.1 on date 02-04-1987 and time 10:04:30 (Italy) in region 6 km SE Cascia (PG)

A magnitude Md 3.1 earthquake occured in region: 6 km SE Cascia (PG), on

  • 02-04-1987 08:04:30 (UTC)
  • 02-04-1987 10:04:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.681, 13.057 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
Cascia PG 6 3217 3217
Monteleone di Spoleto PG 9 599 3816
Poggiodomo PG 11 117 3933
Cittareale RI 11 482 4415
Norcia PG 13 4957 9372
Leonessa RI 15 2435 11807
Accumoli RI 16 667 12474
Posta RI 18 694 13168
Scheggino PG 19 461 13629
Vallo di Nera PG 19 364 13993
Sant'Anatolia di Narco PG 19 564 14557
Cerreto di Spoleto PG 19 1075 15632
Borbona RI 20 617 16249
Amatrice RI 20 2657 18906

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Terni (111501 inhabitants)
42 Km SE of Foligno (57155 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
53 Km W of Teramo (54892 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km N of Tivoli (56533 inhabitants)
83 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km W of Pescara (121014 inhabitants)
98 Km W of Chieti (51815 inhabitants)
99 Km NE of Roma (2864731 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 3.1 1987-04-02
08:04:30
42.681 13.057 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 43989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-02 08:04:30 ± 0.239
Latitude 42.6810 ± 0.0157
Longitude 13.0570 ± 0.0391
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 43989

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) 3641.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.02032
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 43989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1987-04-02T08:05:11.00 10.0 undecidable manual SN 319 0.0111 -0.92 0.4
--.BDI.Z. 1987-04-02T08:05:10.00 10.0 undecidable manual PN 308 0.0203 1.5 0.4
--.SD1.Z. 1987-04-02T08:05:09.50 10.0 undecidable manual SN 150 0.01 0.37 0.8
--.RMP.Z. 1987-04-02T08:05:02.50 10.0 undecidable manual SG 197 0.0081 -0.18 0.7
--.ARV.Z. 1987-04-02T08:05:00.00 10.0 undecidable manual SG 354 0.0074 0.1 0.8
--.SS9.Z. 1987-04-02T08:04:59.00 10.0 undecidable manual PN 325 0.0136 0.66 1.4
--.DUI.Z. 1987-04-02T08:04:59.10 10.0 undecidable manual PN 134 0.013 1.53 0.5
--.CRE.Z. 1987-04-02T08:04:55.50 10.0 undecidable manual PN 319 0.0111 1.02 1.2
--.SD1.Z. 1987-04-02T08:04:53.00 10.0 undecidable manual PN 150 0.01 0.13 2
--.ASS.Z. 1987-04-02T08:04:48.50 10.0 undecidable manual SG 322 0.0043 -0.54 0.6
--.RMP.Z. 1987-04-02T08:04:48.90 10.0 undecidable manual PG 197 0.0081 -0.25 1.9
--.ARV.Z. 1987-04-02T08:04:46.50 10.0 undecidable manual PG 354 0.0074 -1.04 1
--.AQU.Z. 1987-04-02T08:04:45.00 10.0 undecidable manual SG 142 0.0037 -1.69 0.2
--.ASS.Z. 1987-04-02T08:04:40.50 10.0 undecidable manual PG 322 0.0043 -0.77 1.2
--.AQU.Z. 1987-04-02T08:04:39.60 10.0 undecidable manual PG 142 0.0037 -0.32 1.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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