Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.0 on date 22-09-1987 and time 06:24:55 (Italy) in region Costa Marchigiana Fermana (Fermo)

A magnitude Md 4.0 earthquake occured in region: Costa Marchigiana Fermana (Fermo), on

  • 22-09-1987 04:24:55 (UTC)
  • 22-09-1987 06:24:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.21, 13.84 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
Porto San Giorgio FM 5 16121 16121
Porto Sant'Elpidio FM 9 26152 42273
Fermo FM 12 37655 79928
Altidona FM 12 3390 83318
Pedaso FM 13 2800 86118
Lapedona FM 13 1166 87284
Sant'Elpidio a Mare FM 13 17110 104394
Monte Urano FM 14 8353 112747
Civitanova Marche MC 14 41983 154730
Campofilone FM 15 1916 156646
Moresco FM 17 598 157244
Montegranaro FM 17 12990 170234
Monterubbiano FM 17 2230 172464
Massignano AP 18 1638 174102
Montefiore dell'Aso AP 19 2123 176225
Ponzano di Fermo FM 19 1674 177899
Torre San Patrizio FM 19 2048 179947

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km SE of Ancona (100861 inhabitants)
62 Km N of Teramo (54892 inhabitants)
81 Km NW of Montesilvano (53738 inhabitants)
88 Km NW of Pescara (121014 inhabitants)
97 Km SE of Fano (60888 inhabitants)
97 Km E of Foligno (57155 inhabitants)
99 Km N 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 4.0
ML-VAX 3.4 		1987-09-22
04:24:55		 43.21 13.84 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 55829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-22 04:24:55 ± 0.094
Latitude 43.21 ± 0.01
Longitude 13.84 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 55829

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) 1410.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 105
Number of defining phases 105
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.07293
Number of stations at which the event was observed 87
Number of stations from which data was used for origin computation 87
Magnitudes information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 11
Type of magnitude Md
Reference to an origin 55829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:41

ML:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 8
Type of magnitude ML
Reference to an origin 55829
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
--.HAU.Z. 1987-09-22T04:27:54.60 10.0 undecidable manual SN 314 0.0639 -1.42 0.1
--.BSF.Z. 1987-09-22T04:27:48.20 10.0 undecidable manual SN 315 0.0608 0.26 0.4
--.ORX.Z. 1987-09-22T04:27:01.00 10.0 undecidable manual SN 301 0.0435 -1.15 0.2
--.LOR.Z. 1987-09-22T04:26:53.40 10.0 undecidable manual PN 303 0.0729 -0.15 0.9
--.LBF.Z. 1987-09-22T04:26:50.80 10.0 undecidable manual PN 301 0.0712 -0.06 0.9
--.SMF.Z. 1987-09-22T04:26:50.10 10.0 undecidable manual PN 299 0.0707 -0.06 0.9
--.TTG.Z. 1987-09-22T04:26:45.50 10.0 undecidable manual SN 99 0.0363 2.04 0
--.HAU.Z. 1987-09-22T04:26:38.80 10.0 undecidable manual PN 314 0.0639 -0.89 0.6
--.CDF.Z. 1987-09-22T04:26:37.00 10.0 undecidable manual PN 320 0.0622 -0.27 1
--.BDV.Z. 1987-09-22T04:26:37.00 10.0 undecidable manual SN 102 0.0339 0.03 0.6
--.PRU.Z. 1987-09-22T04:26:34.50 10.0 undecidable manual PN 3 0.061 -0.95 0.6
--.VAY.Z. 1987-09-22T04:26:34.00 10.0 undecidable manual PN 103 0.0605 -0.53 0.9
--.BSF.Z. 1987-09-22T04:26:34.40 10.0 undecidable manual PN 315 0.0608 -0.62 0.8
--.HCY.Z. 1987-09-22T04:26:32.00 10.0 undecidable manual SN 100 0.0314 1.64 0.1
--.PAN.Z. 1987-09-22T04:26:27.80 10.0 undecidable manual SN 328 0.0302 0.65 0.5
--.CTI.Z. 1987-09-22T04:26:25.00 10.0 undecidable manual SN 331 0.0291 0.83 0.4
--.KHC.Z. 1987-09-22T04:26:23.00 10.0 undecidable manual PN 358 0.0533 -0.5 1
--.SKO.Z. 1987-09-22T04:26:21.00 10.0 undecidable manual PN 99 0.0515 0.19 1.1
--.SRN.Z. 1987-09-22T04:26:20.40 10.0 undecidable manual PN 123 0.0511 0.14 1.1
--.LPG.Z. 1987-09-22T04:26:19.40 10.0 undecidable manual PN 296 0.0499 0.85 0.7
--.DIX.Z. 1987-09-22T04:26:18.30 10.0 undecidable manual PN 304 0.0486 1.96 0.1
--.FRF.Z. 1987-09-22T04:26:16.30 10.0 undecidable manual PN 275 0.0471 2.15 0.1
--.TRI.N. 1987-09-22T04:26:16.70 10.0 undecidable manual SG
--.LJU.E. 1987-09-22T04:26:14.00 10.0 undecidable manual SN 9 0.0258 -1.53 0.1
--.SAX.Z. 1987-09-22T04:26:14.00 10.0 undecidable manual PN 323 0.0461 1.33 0.4
--.LLS.Z. 1987-09-22T04:26:12.60 10.0 undecidable manual PN 318 0.0448 1.89 0.1
--.DOI.Z. 1987-09-22T04:26:10.50 10.0 undecidable manual PN 287 0.0443 0.62 1
--.STV.Z. 1987-09-22T04:26:09.50 10.0 undecidable manual PN 284 0.0433 1.13 0.6
--.GRI.Z. 1987-09-22T04:26:08.50 10.0 undecidable manual PN 155 0.0431 0.38 1.2
--.CEY.N. 1987-09-22T04:26:08.90 10.0 undecidable manual SN 8 0.023 0.79 0.4
--.ORO.Z. 1987-09-22T04:26:08.21 10.0 undecidable manual PN 301 0.0435 -0.35 1.2
--.ORX.Z. 1987-09-22T04:26:07.70 10.0 undecidable manual PN 301 0.0435 -0.89 0.8
--.TIR.Z. 1987-09-22T04:26:07.70 10.0 undecidable manual PN 110 0.0434 -0.78 0.9
--.BCI.Z. 1987-09-22T04:26:06.60 10.0 undecidable manual PN 98 0.0418 0.64 1
--.TRI.E. 1987-09-22T04:26:06.00 10.0 undecidable manual SN 358 0.0224 -0.6 0.5
--.TMA.Z. 1987-09-22T04:26:05.00 10.0 undecidable manual PN 310 0.041 0.07 1.3
--.PVY.Z. 1987-09-22T04:26:05.80 10.0 undecidable manual PN 95 0.0407 1.39 0.4
--.BHG.Z. 1987-09-22T04:26:05.30 10.0 negative manual PN 351 0.041 0.49 2.2
--.IVA.Z. 1987-09-22T04:26:04.80 10.0 undecidable manual PN 92 0.0399 1.68 0.2
--.OSS.Z. 1987-09-22T04:26:03.70 10.0 undecidable manual PN 324 0.0391 1.76 0.2
--.VAI.Z. 1987-09-22T04:26:03.55 10.0 undecidable manual PN 307 0.0403 -0.24 1.3
--.CKI.Z. 1987-09-22T04:26:00.50 10.0 undecidable manual PN 288 0.0376 0.72 1
--.SDA.Z. 1987-09-22T04:26:00.30 10.0 undecidable manual PN 103 0.0389 -1.35 0.4
--.FIN.Z. 1987-09-22T04:26:00.70 10.0 undecidable manual PN 285 0.0376 0.92 0.8
--.ULC.Z. 1987-09-22T04:25:59.50 10.0 undecidable manual PN 105 0.0375 0.03 1.4
--.TDS.Z. 1987-09-22T04:25:58.00 10.0 undecidable manual PN 151 0.0361 0.67 1
--.TTG.Z. 1987-09-22T04:25:57.50 10.0 undecidable manual PN 99 0.0363 -0.3 1.3
--.MDI.Z. 1987-09-22T04:25:55.69 10.0 undecidable manual PN 312 0.0351 -0.17 1.4
--.NKY.Z. 1987-09-22T04:25:54.50 10.0 undecidable manual PN 93 0.0341 0.26 2.8
--.CVF.Z. 1987-09-22T04:25:54.20 10.0 undecidable manual PN 261 0.0333 1.17 0.6
--.KBA.Z. 1987-09-22T04:25:54.50 10.0 undecidable manual PN 354 0.0349 -1.02 0.7
--.BDV.Z. 1987-09-22T04:25:53.70 10.0 undecidable manual PN 102 0.0339 -0.35 1.3
--.ORI.Z. 1987-09-22T04:25:53.50 10.0 undecidable manual PN 147 0.0334 0.33 1.4
--.RNI.Z. 1987-09-22T04:25:51.20 10.0 undecidable manual PN 321 0.0322 -0.25 1.4
--.HCY.Z. 1987-09-22T04:25:50.50 10.0 undecidable manual PN 100 0.0314 0.26 1.4
--.CAV.Z. 1987-09-22T04:25:50.50 10.0 undecidable manual PN 331 0.0316 0.03 3
--.BOB.Z. 1987-09-22T04:25:50.50 10.0 undecidable manual PN 297 0.0317 -0.1 1.5
--.VEA.Z. 1987-09-22T04:25:50.00 10.0 undecidable manual PN 300 0.0312 0.16 1.5
--.BRY.Z. 1987-09-22T04:25:49.70 10.0 undecidable manual PN 93 0.031 0.15 1.5
--.FVI.Z. 1987-09-22T04:25:49.20 10.0 undecidable manual PN 347 0.0311 -0.58 1.2
--.BVT.Z. 1987-09-22T04:25:48.80 10.0 undecidable manual PN? 294 0.0284 3.09 0
--.PAN.Z. 1987-09-22T04:25:48.20 10.0 undecidable manual PN 328 0.0302 -0.18 1.5
--.SAL.Z. 1987-09-22T04:25:48.50 10.0 undecidable manual PN 316 0.0303 0.02 1.5
--.MGR.Z. 1987-09-22T04:25:47.50 10.0 undecidable manual PN 156 0.03 -0.43 1.3
--.CTI.Z. 1987-09-22T04:25:47.00 10.0 positive manual PN 331 0.0291 0.34 2.8
--.BAL.Z. 1987-09-22T04:25:47.80 10.0 undecidable manual PN 321 0.03 -0.2 2.9
--.DDS.Z. 1987-09-22T04:25:47.10 10.0 undecidable manual PN 325 0.0294 -0.03 1.5
--.BRT.Z. 1987-09-22T04:25:47.50 10.0 undecidable manual PN 132 0.0304 -1.26 0.5
--.RBL.Z. 1987-09-22T04:25:46.50 10.0 undecidable manual PN 356 0.0291 -0.13 1.5
--.TRI.Z. 1987-09-22T04:25:35.40 10.0 negative manual PN 358 0.0224 -1.12 1.3
--.BAI.Z. 1987-09-22T04:25:43.50 10.0 undecidable manual PN 131 0.0277 -1.02 0.8
--.SGO.Z. 1987-09-22T04:25:41.00 10.0 undecidable manual PN 156 0.0257 -0.6 1.2
--.LJU.Z. 1987-09-22T04:25:41.40 10.0 undecidable manual PN 9 0.0258 -0.27 1.4
--.VOY.Z. 1987-09-22T04:25:39.90 10.0 undecidable manual PN 0 0.0253 -1.04 0.7
--.SOR.Z. 1987-09-22T04:25:38.60 10.0 undecidable manual PN 171 0.0239 -0.08 1.5
--.CEY.Z. 1987-09-22T04:25:37.80 10.0 undecidable manual PN 8 0.023 0.42 1.3
--.TR9.Z. 1987-09-22T04:25:36.70 10.0 positive manual PN 153 0.0215 1.56 0.6
--.VBY.Z. 1987-09-22T04:25:36.50 10.0 undecidable manual PN 22 0.0225 -0.12 1.5
--.PII.Z. 1987-09-22T04:25:36.50 10.0 undecidable manual PN 282 0.0221 0.46 1.3
--.BDI.Z. 1987-09-22T04:25:35.50 10.0 undecidable manual PN 290 0.0224 -1.04 0.7
--.MAO.Z. 1987-09-22T04:25:31.65 10.0 undecidable manual PN 248 0.0191 0.21 1.5
--.MS1.Z. 1987-09-22T04:25:31.00 10.0 undecidable manual PN 133 0.0194 -0.89 0.9
--.HVA.Z. 1987-09-22T04:25:28.20 10.0 undecidable manual PN 89 0.017 -0.1 3
--.ASS.Z. 1987-09-22T04:25:27.90 10.0 undecidable manual SG 260 0.0079 0.49 0.5
--.SGG.Z. 1987-09-22T04:25:27.80 10.0 undecidable manual PN 167 0.0168 -0.08 1.5
--.SS9.Z. 1987-09-22T04:25:26.27 10.0 undecidable manual PN 296 0.0144 1.95 0.1
--.FG2.Z. 1987-09-22T04:25:25.00 10.0 undecidable manual PN 144 0.0153 -0.71 1.1
--.DUI.Z. 1987-09-22T04:25:24.64 10.0 undecidable manual PN 163 0.0145 0.19 1.5
--.RMP.Z. 1987-09-22T04:25:24.00 10.0 undecidable manual PN 211 0.0147 -0.68 1.1
--.CP9.Z. 1987-09-22T04:25:23.28 10.0 undecidable manual PN 205 0.0134 0.42 1.3
--.SDI.Z. 1987-09-22T04:25:22.92 10.0 undecidable manual PN 180 0.0135 0.04 1.5
--.ARV.Z. 1987-09-22T04:25:21.50 10.0 undecidable manual SG 293 0.0064 0.29 0.6
--.MNS.Z. 1987-09-22T04:25:17.50 10.0 undecidable manual PN 225 0.0107 -1.06 0.7
--.CM8.Z. 1987-09-22T04:25:15.37 10.0 undecidable manual SG 267 0.0045 0.7 0.7
--.AQU.Z. 1987-09-22T04:25:14.12 10.0 undecidable manual PG 200 0.0082 0.05 1.5
--.ALP.Z. 1987-09-22T04:25:13.29 10.0 undecidable manual SG 204 0.0043 -0.3 0.8
--.PRG.Z. 1987-09-22T04:25:12.00 10.0 undecidable manual PG! 264 0.0095 -4.73 0
--.ASS.Z. 1987-09-22T04:25:11.85 10.0 undecidable manual PG 260 0.0079 -1.57 0.3
--.AM8.Z. 1987-09-22T04:25:10.77 10.0 undecidable manual SG 332 0.0034 0.61 0.7
--.ARV.Z. 1987-09-22T04:25:10.30 10.0 undecidable manual PG 293 0.0064 -0.01 1.5
--.CM8.Z. 1987-09-22T04:25:05.45 10.0 negative manual PG 267 0.0045 -1.08 1.4
--.ALP.Z. 1987-09-22T04:25:04.50 10.0 negative manual PG 204 0.0043 -1.41 0.8
--.AM8.Z. 1987-09-22T04:25:02.48 10.0 undecidable manual PG 332 0.0034 -1.45 0.8
--.MC8.Z. 1987-09-22T04:25:02.32 10.0 undecidable manual PG 284 0.0028 -0.27 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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