Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.7 on date 01-07-1991 and time 04:03:00 (Italy) in region 5 km E Mondolfo (PU)

A magnitude Md 2.7 earthquake occured in region: 5 km E Mondolfo (PU), on

  • 01-07-1991 02:03:00 (UTC)
  • 01-07-1991 04:03:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.75, 13.16 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.

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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
Mondolfo PU 5 14277 14277
Senigallia AN 6 45027 59304
San Costanzo PU 7 4786 64090
Trecastelli AN 9 7625 71715
Monte Porzio PU 11 2836 74551
Corinaldo AN 14 4998 79549
San Giorgio di Pesaro PU 15 1388 80937
Ostra AN 15 6875 87812
Piagge PU 15 1022 88834
Fano PU 16 60888 149722
Morro d'Alba AN 17 1903 151625
Orciano di Pesaro PU 17 2028 153653
Montemarciano AN 17 9992 163645
Montemaggiore al Metauro PU 17 2893 166538
Mondavio PU 17 3810 170348
Ostra Vetere AN 18 3311 173659
Belvedere Ostrense AN 18 2234 175893
Monte San Vito AN 19 6848 182741
San Marcello AN 19 2057 184798

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SE of Fano (60888 inhabitants)
27 Km SE of Pesaro (94582 inhabitants)
32 Km W of Ancona (100861 inhabitants)
59 Km SE of Rimini (147750 inhabitants)
85 Km SE of Cesena (96758 inhabitants)
94 Km NE of Perugia (166134 inhabitants)
95 Km NE of Foligno (57155 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 2.7
ML-VAX 1.9 		1991-07-01
02:03:00		 43.75 13.16 5 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 144459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-07-01 02:03:00 ± 0.295
Latitude 43.75 ± 0.01
Longitude 13.16 ± 0.02
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 144459

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) 2004.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.01263
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 144459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:14:53

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 144459
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
--.PGD.Z. 1991-07-01T02:03:37.74 10.0 undecidable manual SG 277 0.0094 0.88 0.2
--.SFI.Z. 1991-07-01T02:03:33.79 10.0 undecidable manual SG 279 0.0086 -0.3 0.7
--.CRE.Z. 1991-07-01T02:03:32.00 10.0 undecidable manual SG 262 0.0079 0.36 0.6
--.RMF.Z. 1991-07-01T02:03:30.20 10.0 undecidable manual SG 177 0.0071 1.23 0.1
--.ASS.Z. 1991-07-01T02:03:29.00 10.0 undecidable manual SG 208 0.007 0.75 0.4
--.MNS.Z. 1991-07-01T02:03:27.00 10.0 undecidable manual PN 194 0.0126 0.4 1.1
--.PGD.Z. 1991-07-01T02:03:21.63 10.0 undecidable manual PG 277 0.0094 0.14 1.6
--.CIO.Z. 1991-07-01T02:03:21.37 10.0 undecidable manual SG 180 0.0049 0.33 0.7
--.ALP.Z. 1991-07-01T02:03:20.58 10.0 undecidable manual PG 162 0.0091 -0.28 1.6
--.SFI.Z. 1991-07-01T02:03:19.29 10.0 undecidable manual PG 279 0.0086 -0.6 1.2
--.CRE.Z. 1991-07-01T02:03:18.50 10.0 undecidable manual PG 262 0.0079 0.03 1.9
--.RMF.Z. 1991-07-01T02:03:16.39 10.0 undecidable manual PG 177 0.0071 -0.44 1.6
--.ASS.Z. 1991-07-01T02:03:15.49 10.0 undecidable manual PG 208 0.007 -1.02 0.5
--.AOI.Z. 1991-07-01T02:03:15.78 10.0 undecidable manual SG 121 0.0033 0.7 0.3
--.ARV.Z. 1991-07-01T02:03:12.80 10.0 undecidable manual SG 211 0.0026 0.25 0.7
--.RSM.Z. 1991-07-01T02:03:12.50 10.0 undecidable manual PG 289 0.0049 0.33 1.6
--.CIO.Z. 1991-07-01T02:03:11.28 10.0 undecidable manual PG 180 0.0049 -1.07 0.4
--.AOI.Z. 1991-07-01T02:03:09.13 10.0 undecidable manual PG 121 0.0033 0.22 1.8
--.ARV.Z. 1991-07-01T02:03:06.96 10.0 undecidable manual PG 211 0.0026 -0.07 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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