Earthquake with magnitude of Md 3.7 on date 26-02-1991 and time 08:25:40 (Italy) in region Tirreno Meridionale (MARE)

A magnitude Md 3.7 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 26-02-1991 07:25:40 (UTC)
  • 26-02-1991 08:25:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.13, 13.81 at 447 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
83 Km S of Pozzuoli (81661 inhabitants)
85 Km SW of Castellammare di Stabia (66466 inhabitants)
87 Km SW of Torre del Greco (86275 inhabitants)
87 Km SW of Napoli (974074 inhabitants)
88 Km SW of Ercolano (53709 inhabitants)
90 Km SW of Portici (55274 inhabitants)
91 Km SW of Marano di Napoli (59874 inhabitants)
92 Km SW of Scafati (50787 inhabitants)
95 Km SW of Giugliano in Campania (122974 inhabitants)
95 Km SW of Casoria (77642 inhabitants)
98 Km SW of Afragola (65057 inhabitants)
99 Km SW of Cava de' Tirreni (53659 inhabitants)
100 Km SW of Aversa (53047 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 3.7
ML-VAX 4.5
1991-02-26
07:25:40
40.13 13.81 447 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 136729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-02-26 07:25:40 ± 0.506
Latitude 40.13 ± 0.02
Longitude 13.81 ± 0.03
Depth (km) 447 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 136729

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) 3158
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 88
Number of defining phases 88
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.01093
Epicentral distance of station farthest from the epicenter (degree) 0.06476
Number of stations at which the event was observed 69
Number of stations from which data was used for origin computation 69
Magnitudes information

Md:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 14
Type of magnitude Md
Reference to an origin 136729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:07:28

ML:4.5

Field Value
Value 4.5
Uncertainty
Num. used stations 11
Type of magnitude ML
Reference to an origin 136729
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
--.NO1.Z. 1991-02-26T07:28:50.00 10.0 undecidable manual S ! 327 0.0588 3.51 0
--.DOI.Z. 1991-02-26T07:28:48.00 10.0 undecidable manual S 315 0.0588 1.46 0.1
--.FVI.Z. 1991-02-26T07:28:43.00 10.0 undecidable manual S ! 354 0.0585 -2.95 0
--.CTI.Z. 1991-02-26T07:28:37.00 10.0 undecidable manual S 346 0.055 -1.06 0.3
--.CKI.Z. 1991-02-26T07:28:35.00 10.0 undecidable manual S 319 0.0533 0.76 0.3
--.SAL.Z. 1991-02-26T07:28:33.00 10.0 undecidable manual S ! 338 0.0538 -2.29 0
--.TRI.Z. 1991-02-26T07:28:26.00 10.0 undecidable manual S 0 0.0502 -1.38 0.1
--.PUK.Z. 1991-02-26T07:28:14.90 10.0 undecidable manual S 66 0.0446 -0.65 0.3
--.MME.Z. 1991-02-26T07:28:09.00 10.0 undecidable manual S 332 0.042 -1.11 0.3
--.SFI.Z. 1991-02-26T07:27:58.70 10.0 undecidable manual S 340 0.0363 -0.31 0.6
--.CRE.Z. 1991-02-26T07:27:53.50 10.0 undecidable manual S 339 0.0338 -0.68 0.5
--.PZI.Z. 1991-02-26T07:27:45.00 10.0 undecidable manual S 164 0.0287 -0.37 0.7
--.BNI.Z. 1991-02-26T07:27:34.88 10.0 undecidable manual P 316 0.0648 -0.62 0.6
--.MNO.Z. 1991-02-26T07:27:33.50 10.0 undecidable manual S 163 0.0206 0.34 0.7
--.MNS.Z. 1991-02-26T07:27:33.50 10.0 undecidable manual S 340 0.0216 -1 0.4
--.GIB.Z. 1991-02-26T07:27:29.50 10.0 undecidable manual S ! 176 0.0193 -1.87 0
--.TDS.Z. 1991-02-26T07:27:28.00 10.0 undecidable manual S 103 0.0179 -1.61 0.2
--.NO1.Z. 1991-02-26T07:27:27.00 10.0 undecidable manual P 327 0.0588 -0.67 0.7
--.VAI.Z. 1991-02-26T07:27:27.35 10.0 negative manual P ! 330 0.0614 -3.68 0
--.DOI.Z. 1991-02-26T07:27:26.53 10.0 negative manual P 315 0.0588 -1.17 0.8
--.DUI.Z. 1991-02-26T07:27:26.17 10.0 undecidable manual S 18 0.0144 0.37 0.4
--.FVI.Z. 1991-02-26T07:27:25.40 10.0 positive manual P 354 0.0585 -1.96 0.2
--.AB9.Z. 1991-02-26T07:27:23.44 10.0 undecidable manual P 320 0.0561 -0.62 0.7
--.SGO.Z. 1991-02-26T07:27:23.50 10.0 undecidable manual S 69 0.0109 0.8 0.3
--.MDI.Z. 1991-02-26T07:27:22.78 10.0 negative manual P ! 334 0.0576 -3.31 0
--.MGR.Z. 1991-02-26T07:27:22.00 10.0 undecidable manual S 90 0.0119 -1.53 0.1
--.CTI.Z. 1991-02-26T07:27:21.00 10.0 negative manual P 346 0.055 -1.8 0.3
--.CKI.Z. 1991-02-26T07:27:20.54 10.0 negative manual P 319 0.0533 -0.06 1.8
--.SAL.Z. 1991-02-26T07:27:19.00 10.0 negative manual P ! 338 0.0538 -2.21 0
--.VVI.Z. 1991-02-26T07:27:18.96 10.0 undecidable manual P 351 0.0534 -1.72 0.2
--.BOB.Z. 1991-02-26T07:27:16.70 10.0 negative manual P 327 0.0508 -0.71 1.4
--.TRI.Z. 1991-02-26T07:27:14.98 10.0 negative manual P 0 0.0502 -1.66 0.4
--.KKS.Z. 1991-02-26T07:27:14.90 10.0 negative manual P 67 0.048 1.07 1
--.BCI.Z. 1991-02-26T07:27:13.00 10.0 positive manual P 63 0.0468 0.6 1.6
--.LSK.Z. 1991-02-26T07:27:10.40 10.0 undecidable manual P 88 0.0466 -1.79 0.2
--.PUK.Z. 1991-02-26T07:27:10.70 10.0 positive manual P 66 0.0446 0.89 1.3
--.SDA.Z. 1991-02-26T07:27:07.70 10.0 positive manual P 65 0.0421 0.98 1.2
--.TIR.Z. 1991-02-26T07:27:07.70 10.0 negative manual P 74 0.0426 0.35 1.9
--.MME.Z. 1991-02-26T07:27:06.50 10.0 negative manual P 332 0.042 -0.17 2
--.BDI.Z. 1991-02-26T07:27:05.61 10.0 positive manual P 330 0.0414 -0.3 1
--.PII.Z. 1991-02-26T07:27:05.61 10.0 undecidable manual P ! 327 0.0391 2.29 0
--.SFI.Z. 1991-02-26T07:27:01.00 10.0 positive manual P 340 0.0363 0.74 1.7
--.PGD.Z. 1991-02-26T07:27:00.77 10.0 undecidable manual P 339 0.0364 0.43 1
--.SR3.Z. 1991-02-26T07:27:00.00 10.0 negative manual P 340 0.0362 -0.08 2.2
--.RSM.Z. 1991-02-26T07:26:59.62 10.0 undecidable manual P 346 0.0354 0.48 1
--.CRE.Z. 1991-02-26T07:26:57.84 10.0 positive manual P 339 0.0338 0.37 2.1
--.PTS.Z. 1991-02-26T07:26:56.77 10.0 undecidable manual P 204 0.0325 0.64 0.9
--.ARV.Z. 1991-02-26T07:26:54.81 10.0 negative manual P 350 0.0308 0.36 2.2
--.LCI.Z. 1991-02-26T07:26:52.37 10.0 positive manual P 86 0.0295 -0.77 1.7
--.MAO.Z. 1991-02-26T07:26:52.23 10.0 undecidable manual P 320 0.0273 1.21 0.5
--.PZI.Z. 1991-02-26T07:26:51.18 10.0 positive manual P 164 0.0287 -1.2 1.1
--.ASS.Z. 1991-02-26T07:26:51.93 10.0 negative manual P 344 0.0274 0.74 0.9
--.MEU.Z. 1991-02-26T07:26:50.50 10.0 positive manual P 165 0.028 -1.22 1
--.FAI.Z. 1991-02-26T07:26:50.50 10.0 undecidable manual P 183 0.0257 0.48 1
--.PE1.Z. 1991-02-26T07:26:49.20 10.0 negative manual P 75 0.0254 -0.07 2.3
--.GIO.Z. 1991-02-26T07:26:48.50 10.0 undecidable manual P 159 0.0248 -0.17 1.2
--.RI2.Z. 1991-02-26T07:26:48.40 10.0 negative manual P 129 0.0241 0.28 2.3
--.CVT.Z. 1991-02-26T07:26:48.00 10.0 undecidable manual P 199 0.0232 0.67 0.9
--.MNS.Z. 1991-02-26T07:26:47.49 10.0 negative manual P 340 0.0216 1.38 0.8
--.BAI.Z. 1991-02-26T07:26:47.00 10.0 negative manual P 67 0.0227 0.08 2.3
--.MCT.Z. 1991-02-26T07:26:47.88 10.0 undecidable manual P 184 0.0226 1.01 0.7
--.BRT.Z. 1991-02-26T07:26:47.33 10.0 positive manual P 73 0.0237 -0.47 2.1
--.FE2.Z. 1991-02-26T07:26:47.20 10.0 undecidable manual P 140 0.0246 -1.33 0.9
--.SE2.Z. 1991-02-26T07:26:46.12 10.0 negative manual P 116 0.0225 -0.67 1.8
--.SOI.Z. 1991-02-26T07:26:46.85 10.0 negative manual P 140 0.0242 -1.35 0.9
--.AQU.Z. 1991-02-26T07:26:46.61 10.0 undecidable manual P 353 0.0202 1.65 0.3
--.MNO.Z. 1991-02-26T07:26:45.93 10.0 negative manual P 163 0.0206 0.59 1.9
--.GRI.Z. 1991-02-26T07:26:45.13 10.0 undecidable manual P 123 0.0215 -0.89 0.8
--.MS1.Z. 1991-02-26T07:26:45.00 10.0 undecidable manual P 45 0.0202 0.01 1.2
--.AZI.Z. 1991-02-26T07:26:44.14 10.0 negative manual P 352 0.0168 1.54 0.3
--.RMP.Z. 1991-02-26T07:26:44.90 10.0 negative manual P 334 0.0168 1.48 0.7
--.SC9.Z. 1991-02-26T07:26:44.70 10.0 undecidable manual P 142 0.0214 -1.21 0.5
--.CSI.Z. 1991-02-26T07:26:44.12 10.0 negative manual P 100 0.0173 1.21 1.1
--.RDP.Z. 1991-02-26T07:26:44.20 10.0 negative manual P 334 0.0164 1.72 0.5
--.MSI.Z. 1991-02-26T07:26:44.64 10.0 undecidable manual P 145 0.0211 -1.05 0.6
--.GIB.Z. 1991-02-26T07:26:44.24 10.0 positive manual P 176 0.0193 -0.06 2.3
--.DR2.Z. 1991-02-26T07:26:44.11 10.0 positive manual P 132 0.0198 -0.61 1.9
--.CDT.Z. 1991-02-26T07:26:44.00 10.0 undecidable manual P 63 0.0188 0.05 1.2
--.ROI.Z. 1991-02-26T07:26:44.53 10.0 negative manual P 104 0.0196 -0.02 2.3
--.CP9.Z. 1991-02-26T07:26:43.78 10.0 undecidable manual P 340 0.0166 1.35 0.4
--.TDS.Z. 1991-02-26T07:26:43.50 10.0 positive manual P 103 0.0179 0.22 2.3
--.ORI.Z. 1991-02-26T07:26:43.67 10.0 negative manual P 92 0.0181 0.26 1.1
--.DUI.Z. 1991-02-26T07:26:42.50 10.0 negative manual P 18 0.0144 1.42 0.8
--.SA1.Z. 1991-02-26T07:26:42.11 10.0 undecidable manual P 153 0.0157 0.22 1.1
--.USI.Z. 1991-02-26T07:26:41.40 10.0 undecidable manual P 200 0.0134 0.47 1
--.MMN.Z. 1991-02-26T07:26:41.60 10.0 negative manual P 98 0.0151 0.1 2.3
--.MGR.Z. 1991-02-26T07:26:40.14 10.0 positive manual P 90 0.0119 0.37 1.1
--.SGO.Z. 1991-02-26T07:26:40.40 10.0 negative manual P 69 0.0109 0.75 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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