Earthquake with magnitude of Md 2.1 on date 11-01-1989 and time 21:23:36 (Italy) in region 5 km SE Bolognola (MC)

A magnitude Md 2.1 earthquake occured in region: 5 km SE Bolognola (MC), on

  • 11-01-1989 20:23:36 (UTC)
  • 11-01-1989 21:23:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.97, 13.28 at 27 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
Bolognola MC 5 142 142
Montefortino FM 6 1178 1320
Amandola FM 7 3629 4949
Sarnano MC 7 3264 8213
Montemonaco AP 9 604 8817
Acquacanina MC 10 121 8938
Comunanza AP 11 3166 12104
Ussita MC 12 444 12548
Gualdo MC 12 815 13363
Fiastra MC 12 559 13922
Castelsantangelo sul Nera MC 13 281 14203
Smerillo FM 14 365 14568
Monte San Martino MC 15 765 15333
Montefalcone Appennino FM 15 424 15757
Montegallo AP 15 523 16280
Penna San Giovanni MC 15 1108 17388
Cessapalombo MC 15 512 17900
San Ginesio MC 16 3498 21398
Visso MC 16 1107 22505
Fiordimonte MC 17 202 22707
Palmiano AP 17 196 22903
Sant'Angelo in Pontano MC 17 1436 24339
Force AP 18 1354 25693
Camporotondo di Fiastrone MC 18 563 26256
Pievebovigliana MC 19 866 27122
Santa Vittoria in Matenano FM 19 1330 28452
Caldarola MC 19 1823 30275

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km E of Foligno (57155 inhabitants)
49 Km NW of Teramo (54892 inhabitants)
69 Km NE of Terni (111501 inhabitants)
70 Km N of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
74 Km S of Ancona (100861 inhabitants)
88 Km NW of Montesilvano (53738 inhabitants)
95 Km NW of Pescara (121014 inhabitants)
99 Km S of Fano (60888 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 2.1
ML-VAX 1.6
1989-01-11
20:23:36
42.97 13.28 27 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 85099
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-01-11 20:23:36 ± 0.204
Latitude 42.97 ± 0.02
Longitude 13.28 ± 0.02
Depth (km) 27 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 85099

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) 2479.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.0004
Epicentral distance of station farthest from the epicenter (degree) 0.00559
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 85099
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:19:54

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 85099
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. 1989-01-11T20:23:58.91 10.0 undecidable manual SN 335 0.0052 0.97 0
--.AM8.Z. 1989-01-11T20:23:58.70 10.0 undecidable manual SN 22 0.0056 -0.28 0.4
--.ASS.Z. 1989-01-11T20:23:54.29 10.0 undecidable manual SG 281 0.0041 -0.45 0.3
--.ALP.Z. 1989-01-11T20:23:49.90 10.0 undecidable manual SG 131 0.0025 0.12 1
--.ARV.Z. 1989-01-11T20:23:49.42 10.0 undecidable manual PN 335 0.0052 0.37 0.9
--.CM8.Z. 1989-01-11T20:23:48.80 10.0 undecidable manual SG 336 0.0021 0.17 0.9
--.AM8.Z. 1989-01-11T20:23:48.80 10.0 undecidable manual PN 22 0.0056 -0.87 0.1
--.ASS.Z. 1989-01-11T20:23:46.99 10.0 undecidable manual PG 281 0.0041 -0.22 1.3
--.ALP.Z. 1989-01-11T20:23:44.50 10.0 undecidable manual PG 131 0.0025 0.15 3.1
--.SS8.Z. 1989-01-11T20:23:44.90 10.0 undecidable manual SG 315 0.0004 -0.45 0.5
--.CM8.Z. 1989-01-11T20:23:43.90 10.0 undecidable manual PG 336 0.0021 0.22 2.9
--.SS8.Z. 1989-01-11T20:23:41.80 10.0 undecidable manual PG? 315 0.0004 0 0.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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