Earthquake with magnitude of Md 3.0 on date 20-08-1987 and time 08:32:27 (Italy) in region 1 km SW Fermo (FM)

A magnitude Md 3.0 earthquake occured in region: 1 km SW Fermo (FM), on

  • 20-08-1987 06:32:27 (UTC)
  • 20-08-1987 08:32:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.15, 13.71 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
Fermo FM 1 37655 37655
Lapedona FM 7 1166 38821
Ponzano di Fermo FM 7 1674 40495
Monte Urano FM 7 8353 48848
Monterubbiano FM 7 2230 51078
Moresco FM 7 598 51676
Porto San Giorgio FM 8 16121 67797
Altidona FM 8 3390 71187
Sant'Elpidio a Mare FM 9 17110 88297
Monte Giberto FM 9 801 89098
Torre San Patrizio FM 9 2048 91146
Rapagnano FM 10 2145 93291
Grottazzolina FM 10 3398 96689
Magliano di Tenna FM 10 1452 98141
Petritoli FM 10 2335 100476
Montegranaro FM 11 12990 113466
Montefiore dell'Aso AP 11 2123 115589
Campofilone FM 12 1916 117505
Monte San Pietrangeli FM 12 2458 119963
Pedaso FM 12 2800 122763
Porto Sant'Elpidio FM 13 26152 148915
Monte Vidon Combatte FM 13 433 149348
Massignano AP 13 1638 150986
Carassai AP 13 1100 152086
Monte San Giusto MC 13 8191 160277
Montottone FM 14 979 161256
Montegiorgio FM 14 6851 168107
Francavilla d'Ete FM 15 964 169071
Belmonte Piceno FM 15 646 169717
Monsampietro Morico FM 16 659 170376
Ortezzano FM 16 774 171150
Monte Rinaldo FM 17 379 171529
Ripatransone AP 17 4309 175838
Civitanova Marche MC 18 41983 217821
Cupra Marittima AP 18 5398 223219
Cossignano AP 19 978 224197
Monteleone di Fermo FM 19 395 224592
Monte Vidon Corrado FM 19 731 225323
Mogliano MC 19 4696 230019
Massa Fermana FM 19 963 230982
Servigliano FM 19 2336 233318
Montecosaro MC 20 7113 240431
Corridonia MC 20 15430 255861
Montappone FM 20 1682 257543
Falerone FM 20 3337 260880
Montalto delle Marche AP 20 2122 263002

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km S of Ancona (100861 inhabitants)
55 Km N of Teramo (54892 inhabitants)
79 Km NW of Montesilvano (53738 inhabitants)
85 Km E of Foligno (57155 inhabitants)
87 Km NW of Pescara (121014 inhabitants)
92 Km N of L'Aquila (69753 inhabitants)
95 Km SE of Fano (60888 inhabitants)
96 Km NW of Chieti (51815 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 3.0
ML-VAX 2.7
1987-08-20
06:32:27
43.15 13.71 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 54239
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-20 06:32:27 ± 0.303
Latitude 43.15 ± 0.02
Longitude 13.71 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 54239

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) 2679.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.02914
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:3

Field Value
Value 3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 54239
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:52:18

ML:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 54239
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
--.HVA.Z. 1987-08-20T06:33:25.60 10.0 undecidable manual SN 87 0.0179 -1.11 0
--.CTI.Z. 1987-08-20T06:33:18.19 10.0 undecidable manual PN 333 0.0291 -0.64 0.3
--.MNS.Z. 1987-08-20T06:33:05.00 10.0 undecidable manual SG 224 0.0096 0.15 0.4
--.HVA.Z. 1987-08-20T06:33:02.30 10.0 undecidable manual PN 87 0.0179 0.64 0.7
--.ASS.Z. 1987-08-20T06:32:55.00 10.0 undecidable manual SG 263 0.007 -0.28 0.4
--.SDI.Z. 1987-08-20T06:32:53.31 10.0 undecidable manual PN 176 0.013 -0.77 0.3
--.MNS.Z. 1987-08-20T06:32:48.98 10.0 positive manual PG 224 0.0096 -0.05 2.2
--.AQU.Z. 1987-08-20T06:32:45.00 10.0 undecidable manual PG 195 0.0074 0.56 0.5
--.ASS.Z. 1987-08-20T06:32:43.36 10.0 positive manual PG 263 0.007 -0.15 2.1
--.ARV.Z. 1987-08-20T06:32:41.59 10.0 positive manual PG 301 0.0059 0.31 1.8
--.CM8.Z. 1987-08-20T06:32:36.78 10.0 negative manual PG 275 0.0037 0.04 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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