Earthquake with magnitude of Md 2.6 on date 31-01-1988 and time 23:38:48 (Italy) in region Costa Marchigiana Anconetana (Ancona)

A magnitude Md 2.6 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 31-01-1988 22:38:48 (UTC)
  • 31-01-1988 23:38:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.66, 13.36 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
Falconara Marittima AN 4 26565 26565
Montemarciano AN 4 9992 36557
Chiaravalle AN 7 14796 51353
Camerata Picena AN 9 2567 53920
Monte San Vito AN 9 6848 60768
Agugliano AN 13 4865 65633
Senigallia AN 13 45027 110660
Morro d'Alba AN 13 1903 112563
Ancona AN 13 100861 213424
Monsano AN 14 3405 216829
Polverigi AN 15 4508 221337
San Marcello AN 15 2057 223394
Offagna AN 16 1935 225329
Ostra AN 17 6875 232204
Jesi AN 18 40399 272603
Belvedere Ostrense AN 18 2234 274837
Santa Maria Nuova AN 18 4179 279016

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Ancona (100861 inhabitants)
35 Km SE of Fano (60888 inhabitants)
46 Km SE of Pesaro (94582 inhabitants)
78 Km SE of Rimini (147750 inhabitants)
94 Km NE of Foligno (57155 inhabitants)
100 Km NE of Perugia (166134 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 2.6
ML-VAX 1.8
1988-01-31
22:38:48
43.66 13.36 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 62009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-01-31 22:38:48 ± 0.576
Latitude 43.66 ± 0.03
Longitude 13.36 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 62009

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) 5222.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 297
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.01004
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:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 62009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:58:59

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 62009
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
--.ASS.Z. 1988-01-31T22:39:18.00 10.0 undecidable manual SG 220 0.007 0.94 0
--.SS9.Z. 1988-01-31T22:39:11.44 10.0 undecidable manual PN 283 0.01 0.26 1.2
--.ASS.Z. 1988-01-31T22:39:04.88 10.0 undecidable manual PG 220 0.007 -0.3 1.4
--.ARV.Z. 1988-01-31T22:39:02.00 10.0 undecidable manual SG 242 0.003 -0.2 0.7
--.ARV.Z. 1988-01-31T22:38:56.34 10.0 undecidable manual PG 242 0.003 -0.26 1.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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