Earthquake with magnitude of Md 2.5 on date 20-08-1989 and time 20:27:52 (Italy) in region Costa Marchigiana Anconetana (Ancona)

A magnitude Md 2.5 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 20-08-1989 18:27:52 (UTC)
  • 20-08-1989 20:27:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.741, 13.271 at 14 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
Senigallia AN 5 45027 45027
Montemarciano AN 12 9992 55019
Mondolfo PU 14 14277 69296
Trecastelli AN 15 7625 76921
Monte San Vito AN 16 6848 83769
Morro d'Alba AN 16 1903 85672
Chiaravalle AN 16 14796 100468
San Costanzo PU 16 4786 105254
Falconara Marittima AN 16 26565 131819
Ostra AN 17 6875 138694
Monte Porzio PU 19 2836 141530
San Marcello AN 19 2057 143587
Camerata Picena AN 19 2567 146154
Belvedere Ostrense AN 20 2234 148388
Monsano AN 20 3405 151793

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Fano (60888 inhabitants)
24 Km NW of Ancona (100861 inhabitants)
34 Km SE of Pesaro (94582 inhabitants)
67 Km SE of Rimini (147750 inhabitants)
93 Km E of Cesena (96758 inhabitants)
99 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 2.5
ML-VAX 2.1
1989-08-20
18:27:52
43.741 13.271 14 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 97929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-08-20 18:27:52 ± 1.483
Latitude 43.7410 ± 0.0407
Longitude 13.2710 ± 0.1165
Depth (km) 14 ± 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 97929

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) 10399.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 239
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.01279
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 97929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:31:31

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 97929
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. 1989-08-20T18:28:21.14 10.0 undecidable manual SG 213 0.0073 0.43 0.7
--.MNS.Z. 1989-08-20T18:28:19.00 10.0 undecidable manual PN 197 0.0128 1.21 0.6
--.PGD.Z. 1989-08-20T18:28:14.00 10.0 undecidable manual PN 277 0.0101 0.28 1.5
--.SFI.Z. 1989-08-20T18:28:13.90 10.0 undecidable manual PN 279 0.0093 0.56 1.3
--.RSM.Z. 1989-08-20T18:28:12.82 10.0 undecidable manual SG 287 0.0055 -1.68 0.1
--.CRE.Z. 1989-08-20T18:28:11.00 10.0 undecidable manual PN 262 0.0086 -0.47 1.5
--.ALP.Z. 1989-08-20T18:28:10.00 10.0 undecidable manual PN 167 0.0088 -1.77 0.3
--.ASS.Z. 1989-08-20T18:28:09.47 10.0 undecidable manual PG 213 0.0073 0.62 1.5
--.RSM.Z. 1989-08-20T18:28:05.50 10.0 undecidable manual PG 287 0.0055 0.23 1.8
--.ARV.Z. 1989-08-20T18:28:04.00 10.0 undecidable manual SG 224 0.003 -1.51 0.2
--.ARV.Z. 1989-08-20T18:28:00.48 10.0 undecidable manual PG 224 0.003 0.4 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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