Earthquake with magnitude of Md 2.3 on date 26-02-1985 and time 02:52:15 (UTC) in region 4 km SE Gualdo (MC)

A magnitude Md 2.3 earthquake occured in region: 4 km SE Gualdo (MC), on

  • 26-02-1985 02:52:15 (UTC)
  • 26-02-1985 03:52:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.04, 13.37 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gualdo MC 4 815 815
Penna San Giovanni MC 5 1108 1923
Monte San Martino MC 6 765 2688
Sarnano MC 6 3264 5952
Amandola FM 7 3629 9581
Sant'Angelo in Pontano MC 7 1436 11017
Smerillo FM 7 365 11382
San Ginesio MC 9 3498 14880
Montefalcone Appennino FM 9 424 15304
Comunanza AP 10 3166 18470
Santa Vittoria in Matenano FM 10 1330 19800
Servigliano FM 11 2336 22136
Montefortino FM 11 1178 23314
Falerone FM 11 3337 26651
Ripe San Ginesio MC 12 852 27503
Cessapalombo MC 12 512 28015
Force AP 13 1354 29369
Bolognola MC 13 142 29511
Monteleone di Fermo FM 13 395 29906
Monte Vidon Corrado FM 13 731 30637
Montappone FM 13 1682 32319
Camporotondo di Fiastrone MC 14 563 32882
Montelparo FM 14 778 33660
Colmurano MC 14 1263 34923
Loro Piceno MC 15 2401 37324
Belmonte Piceno FM 15 646 37970
Massa Fermana FM 15 963 38933
Monsampietro Morico FM 15 659 39592
Montemonaco AP 16 604 40196
Acquacanina MC 16 121 40317
Caldarola MC 16 1823 42140
Montegiorgio FM 17 6851 48991
Monte Rinaldo FM 17 379 49370
Palmiano AP 17 196 49566
Montottone FM 18 979 50545
Urbisaglia MC 18 2628 53173
Fiastra MC 18 559 53732
Belforte del Chienti MC 18 1886 55618
Rotella AP 18 906 56524
Mogliano MC 19 4696 61220
Montedinove AP 19 488 61708
Ortezzano FM 19 774 62482
Montalto delle Marche AP 20 2122 64604

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km NW of Teramo (54892 inhabitants)
55 Km E of Foligno (57155 inhabitants)
65 Km S of Ancona (100861 inhabitants)
77 Km N of L'Aquila (69753 inhabitants)
80 Km NE of Terni (111501 inhabitants)
80 Km E of Perugia (166134 inhabitants)
86 Km NW of Montesilvano (53738 inhabitants)
94 Km NW of Pescara (121014 inhabitants)
94 Km SE 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 2.3 1985-02-26
02:52:15
43.04 13.37 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 2549
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-26 02:52:15 ± 0.462
Latitude 43.04 ± 0.01
Longitude 13.37 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2549

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) 3236.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 261
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.00745
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 2549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-02-26T02:52:44.00 10.0 undecidable manual SG 217 0.0074 0.34 0.4
--.PO9.Z. 1985-02-26T02:52:36.00 10.0 undecidable manual SG 214 0.005 0.89 0.1
--.AS1.Z. 1985-02-26T02:52:33.80 10.0 undecidable manual SG 272 0.0047 -0.16 0.7
--.MNS.Z. 1985-02-26T02:52:31.00 10.0 undecidable manual PG 217 0.0074 -0.6 0.5
--.PO9.Z. 1985-02-26T02:52:26.80 10.0 undecidable manual PG 214 0.005 0.14 1.6
--.AS1.Z. 1985-02-26T02:52:25.50 10.0 undecidable manual PG 272 0.0047 -0.5 0.8
--.CM8.Z. 1985-02-26T02:52:24.40 10.0 undecidable manual SG 312 0.002 0.05 1
--.CM8.Z. 1985-02-26T02:52:20.70 10.0 undecidable manual PG 312 0.002 0.25 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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