Earthquake with magnitude of Md 2.1 on date 17-04-1987 and time 21:34:42 (UTC) in region 4 km SE Monte Sant'Angelo (FG)

A magnitude Md 2.1 earthquake occured in region: 4 km SE Monte Sant'Angelo (FG), on

  • 17-04-1987 21:34:42 (UTC)
  • 17-04-1987 23:34:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.672, 15.974 at 12 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
Monte Sant'Angelo FG 4 12657 12657
Manfredonia FG 7 57279 69936
Mattinata FG 8 6310 76246

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NE of Manfredonia (57279 inhabitants)
43 Km NE of Foggia (151991 inhabitants)
46 Km N of Cerignola (58396 inhabitants)
47 Km NW of Barletta (94814 inhabitants)
49 Km E of San Severo (53905 inhabitants)
56 Km NW of Andria (100440 inhabitants)
58 Km NW of Trani (56217 inhabitants)
65 Km NW of Bisceglie (55422 inhabitants)
74 Km NW of Molfetta (59874 inhabitants)
87 Km NW of Bitonto (55540 inhabitants)
96 Km NW of Bari (326344 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 2.1 1987-04-17
21:34:42
41.672 15.974 12 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 45119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-17 21:34:42 ± 0.244
Latitude 41.6720 ± 0.0152
Longitude 15.9740 ± 0.0145
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45119

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) 2072.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.01449
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 45119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1987-04-17T21:35:11.50 10.0 undecidable manual PN 272 0.0145 0.96 0.1
--.PE1.Z. 1987-04-17T21:35:07.00 10.0 undecidable manual PN 128 0.0125 -0.47 0.7
--.FG4.Z. 1987-04-17T21:35:05.00 10.0 undecidable manual SG 212 0.0057 0.05 0.7
--.FG5.Z. 1987-04-17T21:35:05.50 10.0 undecidable manual SG 233 0.0058 0.01 0.7
--.CDM.Z. 1987-04-17T21:35:04.50 10.0 undecidable manual SG 159 0.0057 -0.3 0.6
--.FG2.Z. 1987-04-17T21:35:03.30 10.0 undecidable manual SG 282 0.0056 -1.04 0.1
--.BAI.Z. 1987-04-17T21:35:00.00 10.0 undecidable manual PG 129 0.0079 0.02 1.5
--.FG5.Z. 1987-04-17T21:34:56.00 10.0 undecidable manual PG 233 0.0058 0.22 1.6
--.CDM.Z. 1987-04-17T21:34:55.50 10.0 undecidable manual PG 159 0.0057 0.12 1.8
--.FG4.Z. 1987-04-17T21:34:55.50 10.0 undecidable manual PG 212 0.0057 0.04 1.8
--.FG2.Z. 1987-04-17T21:34:54.50 10.0 undecidable manual PG 282 0.0056 -0.61 0.7
--.MS1.Z. 1987-04-17T21:34:47.50 10.0 undecidable manual SG 324 0.0003 0.74 0.2
--.FG3.Z. 1987-04-17T21:34:46.50 10.0 undecidable manual SG 332 0.0003 -0.25 0.6
--.MS1.Z. 1987-04-17T21:34:45.00 10.0 undecidable manual PG 324 0.0003 0.04 1.9
--.FG3.Z. 1987-04-17T21:34:45.00 10.0 undecidable manual PG 332 0.0003 0.05 1.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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