Earthquake with magnitude of Md 2.0 on date 07-08-1987 and time 11:05:19 (Italy) in region 6 km SE Todi (PG)

A magnitude Md 2.0 earthquake occured in region: 6 km SE Todi (PG), on

  • 07-08-1987 09:05:19 (UTC)
  • 07-08-1987 11:05:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.74, 12.45 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
Todi PG 6 16851 16851
Massa Martana PG 7 3770 20621
Acquasparta TR 9 4778 25399
Avigliano Umbro TR 10 2558 27957
Montecastrilli TR 10 5022 32979
Monte Castello di Vibio PG 14 1567 34546
Giano dell'Umbria PG 15 3846 38392
Fratta Todina PG 15 1839 40231
Montecchio TR 16 1676 41907
San Gemini TR 16 5018 46925
Collazzone PG 17 3473 50398
Guardea TR 18 1836 52234

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Terni (111501 inhabitants)
32 Km SW of Foligno (57155 inhabitants)
41 Km S of Perugia (166134 inhabitants)
46 Km NE of Viterbo (67173 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km W of L'Aquila (69753 inhabitants)
90 Km NE of Civitavecchia (52991 inhabitants)
91 Km NW of Tivoli (56533 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
94 Km N 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
Rev 1000 Md 2.0
ML-VAX 1.6
1987-08-07
09:05:19
42.74 12.45 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 53489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-07 09:05:19 ± 0.153
Latitude 42.74 ± 0.00
Longitude 12.45 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53489

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) 1422.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 229
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00316
Epicentral distance of station farthest from the epicenter (degree) 0.00607
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 53489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:35

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 53489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1987-08-07T09:05:43.50 10.0 undecidable manual SG 47 0.0061 0.04 1
--.MNS.Z. 1987-08-07T09:05:34.42 10.0 undecidable manual SG 154 0.0035 0.15 0.5
--.CM8.Z. 1987-08-07T09:05:33.80 10.0 undecidable manual PG? 47 0.0061 -0.35 0
--.ASS.Z. 1987-08-07T09:05:33.50 10.0 undecidable manual SG 24 0.0032 0.06 0.8
--.MNS.Z. 1987-08-07T09:05:28.70 10.0 undecidable manual PG 154 0.0035 -0.05 2
--.ASS.Z. 1987-08-07T09:05:27.47 10.0 undecidable manual PG 24 0.0032 0.08 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