Earthquake with magnitude of ML 0.9 on date 18-08-2009 and time 22:58:14 (Italy) in region 3 km NW Vernio (PO)

A magnitude ML 0.9 earthquake occured in region: 3 km NW Vernio (PO), on

  • 18-08-2009 20:58:14 (UTC)
  • 18-08-2009 22:58:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.07, 11.14 at 8 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
Vernio PO 3 6060 6060
Cantagallo PO 5 3105 9165
Castiglione dei Pepoli BO 8 5648 14813
Vaiano PO 11 9895 24708
Barberino di Mugello FI 11 10836 35544
Sambuca Pistoiese PT 12 1626 37170
Camugnano BO 12 1885 39055
Castel di Casio BO 13 3448 42503
Alto Reno Terme BO 16 6960 49463
Montale PT 18 10737 60200
Montemurlo PO 18 18456 78656
San Benedetto Val di Sambro BO 18 4315 82971
Scarperia e San Piero FI 19 12217 95188

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km N of Prato (191150 inhabitants)
23 Km NE of Pistoia (90315 inhabitants)
35 Km N of Firenze (382808 inhabitants)
35 Km N of Scandicci (50609 inhabitants)
50 Km SW of Bologna (386663 inhabitants)
56 Km SW of Imola (69797 inhabitants)
57 Km E of Lucca (89046 inhabitants)
64 Km W of Faenza (58541 inhabitants)
66 Km S of Modena (184973 inhabitants)
71 Km NE of Pisa (89158 inhabitants)
74 Km W of Forlì (117913 inhabitants)
74 Km E of Viareggio (62467 inhabitants)
80 Km E of Massa (69479 inhabitants)
80 Km SE of Reggio nell'Emilia (171345 inhabitants)
82 Km S of Carpi (70699 inhabitants)
83 Km E of Carrara (63133 inhabitants)
85 Km N of Siena (53903 inhabitants)
88 Km NE of Livorno (159219 inhabitants)
89 Km W of Cesena (96758 inhabitants)
90 Km NW of Arezzo (99543 inhabitants)
93 Km W of Ravenna (159116 inhabitants)
93 Km SW of Ferrara (133155 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 1.3
ML 0.9
2009-08-18
20:58:14
44.07 11.14 8 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 950949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-08-18 20:58:14 ± 0.31
Latitude 44.07 ± 0.01
Longitude 11.14 ± 0.01
Depth (km) 8 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 950949

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1320
Semi-minor axis of confidence ellipse (meter) 706
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 1523.2
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 9
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.20594
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 950949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:08:55

Md:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 950949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:08:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MAGA.HHN. 2009-08-18T20:58:27.20 10.0 undecidable manual Sg 0 0 0
IV.MAGA.HHN. 2009-08-18T20:58:22.71 10.0 undecidable manual Pg 0 0 0
IV.PZZT.HHN. 2009-08-18T20:58:22.79 0.1 undecidable manual Sg 287 0.2059 -0.075 98
IV.MGAB.HHE. 2009-08-18T20:58:21.36 10.0 undecidable manual Pg 0 0 0
IV.SEI.SHZ. 2009-08-18T20:58:21.24 0.1 undecidable manual Sg 96 0.161 -0.016 100
IV.PZZT.HHN. 2009-08-18T20:58:19.51 0.3 undecidable manual Pg 287 0.2059 0.175 72
IV.FNVD.HHZ. 2009-08-18T20:58:19.17 0.1 undecidable manual Sg 354 0.0962 0.089 100
IV.SEI.SHZ. 2009-08-18T20:58:18.46 0.6 undecidable manual Pg 96 0.161 0.055 50
IV.FNVD.HHZ. 2009-08-18T20:58:16.99 0.1 undecidable manual Pg 354 0.0962 -0.157 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FNVD.HHN. ML:1.2 0.000325 0.64 AML other m 2009-08-18T20:58:16.99
IV.FNVD.HHE. ML:1.2 0.000145 0.16 AML other m 2009-08-18T20:58:16.99
IV.SEI.SHZ. Md:1.4 12.3 END duration s
IV.PZZT.HHN. Md:1.4 12.4 END duration s
IV.PZZT.HHE. ML:0.6 2.5E-5 0.1 AML other m 2009-08-18T20:58:19.51
IV.MAGA.HHN. Md:0 23 END duration s
IV.MAGA.HHE. ML:0 4.0E-5 0.84 AML other m 2009-08-18T20:58:22.71
IV.FNVD.HHZ. Md:1.1 9.4 END duration s
IV.MGAB.HHE. Md:0 14 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download