Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 25-10-1988 and time 07:17:00 (Italy) in region 6 km NW Urbino (PU)

A magnitude Md 2.3 earthquake occured in region: 6 km NW Urbino (PU), on

  • 25-10-1988 06:17:00 (UTC)
  • 25-10-1988 07:17:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7620, 12.5820 at 10 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Urbino PU 6 15019 15019
Auditore PU 7 1566 16585
Montecalvo in Foglia PU 7 2718 19303
Sassocorvaro PU 7 3504 22807
Tavoleto PU 10 867 23674
Peglio PU 10 696 24370
Fermignano PU 11 8596 32966
Urbania PU 11 7099 40065
Lunano PU 12 1527 41592
Macerata Feltria PU 12 1990 43582
Petriano PU 12 2829 46411
Mondaino RN 13 1394 47805
Montegridolfo RN 14 1012 48817
Piandimeleto PU 14 2167 50984
Mercatino Conca PU 14 1086 52070
Saludecio RN 14 3120 55190
Monte Grimano Terme PU 15 1136 56326
Montefiore Conca RN 15 2269 58595
Sassofeltrio PU 16 1388 59983
Gemmano RN 16 1158 61141
Monte Cerignone PU 16 669 61810
Frontino PU 16 293 62103
Isola del Piano PU 16 594 62697
Pietrarubbia PU 17 660 63357
Sant'Angelo in Vado PU 17 4133 67490
Belforte all'Isauro PU 17 769 68259
Acqualagna PU 18 4393 72652
Morciano di Romagna RN 18 7045 79697
Montescudo - Monte Colombo RN 18 6779 86476
Vallefoglia PU 19 15018 101494
San Clemente RN 19 5577 107071
Monteciccardo PU 19 1690 108761
Montelabbate PU 20 6938 115699
Carpegna PU 20 1674 117373
Fossombrone PU 20 9575 126948
Montecopiolo PU 20 1128 128076
Piobbico PU 20 2029 130105

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Pesaro (94582 inhabitants)
33 Km S of Rimini (147750 inhabitants)
36 Km W of Fano (60888 inhabitants)
50 Km SE of Cesena (96758 inhabitants)
65 Km NE of Arezzo (99543 inhabitants)
67 Km SE of Forlì (117913 inhabitants)
74 Km N of Perugia (166134 inhabitants)
77 Km W of Ancona (100861 inhabitants)
79 Km SE of Ravenna (159116 inhabitants)
81 Km SE of Faenza (58541 inhabitants)
90 Km N of Foligno (57155 inhabitants)
96 Km SE of Imola (69797 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 2.3
ML-VAX 1.8 		1988-10-25
06:17:00		 43.762 12.582 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 79759
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-10-25 06:17:00 ± 0.266
Latitude 43.7620 ± 0.0244
Longitude 12.5820 ± 0.0267
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 79759

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) 3457.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00170
Epicentral distance of station farthest from the epicenter (degree) 0.00688
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 79759
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:15:03

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 79759
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(km) Takeoff_angle Residual Weight
--.AOI.Z. 1988-10-25T06:17:26.20 10.0 undecidable manual SG 105 0.7659 -0.69 0.4
--.CIO.Z. 1988-10-25T06:17:25.80 10.0 undecidable manual SG 144 0.6882 1.13 0.4
--.PGD.Z. 1988-10-25T06:17:22.00 10.0 undecidable manual SG 280 0.6327 -0.52 0.6
--.SFI.Z. 1988-10-25T06:17:19.87 10.0 undecidable manual SG 285 0.5439 0.01 0.7
--.ARV.Z. 1988-10-25T06:17:15.68 10.0 undecidable manual SG 134 0.3663 1.5 0.1
--.AOI.Z. 1988-10-25T06:17:14.10 10.0 undecidable manual PG 105 0.7659 -1.57 0.3
--.PGD.Z. 1988-10-25T06:17:13.00 10.0 undecidable manual PG 280 0.6327 -0.15 1.7
--.CIO.Z. 1988-10-25T06:17:13.90 10.0 undecidable manual PG 144 0.6882 -0.49 1.3
--.SFI.Z. 1988-10-25T06:17:10.37 10.0 undecidable manual PG 285 0.5439 -1.24 0.6
--.CRE.Z. 1988-10-25T06:17:10.80 10.0 undecidable manual PG 252 0.4773 0.49 1.6
--.RSM.Z. 1988-10-25T06:17:09.50 10.0 undecidable manual SG 330 0.1887 1.08 0.3
--.ARV.Z. 1988-10-25T06:17:08.55 10.0 undecidable manual PG 134 0.3663 0.22 1.8
--.RSM.Z. 1988-10-25T06:17:05.42 10.0 positive manual PG 330 0.1887 0.41 3.3
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download