Earthquake with magnitude of Md 2.2 on date 04-10-1987 and time 14:13:10 (UTC) in region 7 km SE Castelsantangelo sul Nera (MC)

A magnitude Md 2.2 earthquake occured in region: 7 km SE Castelsantangelo sul Nera (MC), on

  • 04-10-1987 14:13:10 (UTC)
  • 04-10-1987 15:13:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.2 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
Castelsantangelo sul Nera MC 7 281 281
Norcia PG 10 4957 5238
Montegallo AP 11 523 5761
Arquata del Tronto AP 11 1178 6939
Ussita MC 12 444 7383
Montemonaco AP 12 604 7987
Visso MC 13 1107 9094
Preci PG 13 724 9818
Montefortino FM 16 1178 10996
Bolognola MC 17 142 11138
Accumoli RI 17 667 11805
Acquasanta Terme AP 19 2916 14721
Amandola FM 20 3629 18350

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
55 Km NE of Terni (111501 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
97 Km NW 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 2.2
ML-VAX 1.9
1987-10-04
14:13:10
42.85 13.2 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 56469
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-04 14:13:10 ± 0.252
Latitude 42.85 ± 0.01
Longitude 13.20 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 56469

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) 2571.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00405
Epicentral distance of station farthest from the epicenter (degree) 0.00607
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 56469
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:14

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 56469
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
--.ARV.Z. 1987-10-04T14:13:35.16 10.0 undecidable manual SG 343 0.0061 0.45 0.3
--.MNS.Z. 1987-10-04T14:13:31.83 10.0 undecidable manual SG 219 0.0053 -0.25 0.5
--.AQU.Z. 1987-10-04T14:13:29.86 10.0 undecidable manual SG 162 0.0046 0.45 0.3
--.ASS.Z. 1987-10-04T14:13:26.80 10.0 undecidable manual SG 298 0.004 -0.68 0.1
--.ARV.Z. 1987-10-04T14:13:24.26 10.0 negative manual PG 343 0.0061 -0.03 2.9
--.MNS.Z. 1987-10-04T14:13:23.40 10.0 negative manual PG 219 0.0053 0.27 2.3
--.AQU.Z. 1987-10-04T14:13:20.58 10.0 undecidable manual PG 162 0.0046 -0.65 0.3
--.ASS.Z. 1987-10-04T14:13:20.33 10.0 undecidable manual PG 298 0.004 0.21 1.3
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