Earthquake with magnitude of ML 1.8 on date 23-03-2009 and time 04:35:44 (Italy) in region 2 km SE San Chirico Raparo (PZ)

A magnitude ML 1.8 earthquake occured in region: 2 km SE San Chirico Raparo (PZ), on

  • 23-03-2009 03:35:44 (UTC)
  • 23-03-2009 04:35:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.18, 16.088 at 6 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
San Chirico Raparo PZ 2 1084 1084
Carbone PZ 4 638 1722
Calvera PZ 6 387 2109
San Martino d'Agri PZ 7 801 2910
Teana PZ 8 613 3523
Castelsaraceno PZ 8 1384 4907
Castronuovo di Sant'Andrea PZ 9 1067 5974
Fardella PZ 10 627 6601
Roccanova PZ 11 1543 8144
Episcopia PZ 12 1434 9578
Latronico PZ 12 4556 14134
Chiaromonte PZ 12 1965 16099
Gallicchio PZ 13 862 16961
Missanello PZ 13 566 17527
Spinoso PZ 14 1462 18989
Armento PZ 14 631 19620
Francavilla in Sinni PZ 15 4215 23835
Montemurro PZ 16 1235 25070
Sant'Arcangelo PZ 18 6533 31603
Senise PZ 18 7115 38718
Sarconi PZ 19 1404 40122
San Severino Lucano PZ 19 1563 41685
Aliano MT 19 1008 42693
Moliterno PZ 20 4062 46755

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km SE of Potenza (67122 inhabitants)
69 Km SW of Matera (60436 inhabitants)
82 Km SW of Altamura (70396 inhabitants)
100 Km N of Cosenza (67546 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 1.9
ML 1.8
2009-03-23
03:35:44
40.18 16.088 7 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 751809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-03-23 03:35:44 ± 0.23
Latitude 40.1800 ± 0.0054
Longitude 16.0880 ± 0.0094
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 751809

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 733
Semi-minor axis of confidence ellipse (meter) 574
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 254
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 751809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:12:55

Md:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 751809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:12:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CMPO.HHZ. 2009-03-23T03:36:05.78 10.0 undecidable manual Pg 0 0 0
MN.CUC.HHZ. 2009-03-23T03:35:56.03 0.3 undecidable manual Sg 228 0.2797 0.066 72
IV.MCEL.HHN. 2009-03-23T03:35:55.40 0.3 undecidable manual Sg 304 0.2617 0.103 72
MN.CUC.HHZ. 2009-03-23T03:35:51.20 0.1 undecidable manual Pg 228 0.2797 -0.114 95
IV.SIRI.HHZ. 2009-03-23T03:35:51.81 0.3 undecidable manual Sg 271 0.1682 -0.024 74
IV.MCEL.HHN. 2009-03-23T03:35:50.76 0.1 undecidable manual Pg 304 0.2617 -0.169 95
IV.SIRI.HHZ. 2009-03-23T03:35:49.01 0.1 undecidable manual Pg 271 0.1682 0.081 98
IV.SCHR.EHE. 2009-03-23T03:35:47.24 0.1 undecidable manual Sg 334 0.0216 -0.122 100
IV.SCHR.EHE. 2009-03-23T03:35:46.56 0.1 undecidable manual Pg 334 0.0216 0.212 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SCHR.EHN. ML:2.2 0.005 0.14 AML other m 2009-03-23T03:35:46.56
IV.SCHR.EHE. Md:1.8 21.6 END duration s
IV.SIRI.HHN. ML:1.8 0.0006 0.19 AML other m 2009-03-23T03:35:49.01
IV.SIRI.HHE. ML:1.8 0.0006 0.19 AML other m 2009-03-23T03:35:49.01
IV.MCEL.HHN. Md:1.9 21.7 END duration s
IV.MCEL.HHE. ML:1.6 0.00021 0.16 AML other m 2009-03-23T03:35:50.76
MN.CUC.HHN. ML:1.4 0.00013 0.46 AML other m 2009-03-23T03:35:51.20
MN.CUC.HHE. ML:1.4 0.0001 0.3 AML other m 2009-03-23T03:35:51.20
IV.SIRI.HHZ. Md:2 26.1 END duration s
MN.CUC.HHZ. Md:1.9 22.2 END duration s
IV.CMPO.HHZ. Md:0 23 END duration s
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download