Earthquake with magnitude of ML-MEDNET 5.6 on date 26-09-1997 and time 02:33:11 (Italy) in region 7 km SW Serravalle di Chienti (MC)

A magnitude ML-MEDNET 5.6 earthquake occured in region: 7 km SW Serravalle di Chienti (MC), on

  • 26-09-1997 00:33:11 (UTC)
  • 26-09-1997 02:33:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0180, 12.9130 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
Serravalle di Chienti MC 7 1070 1070
Monte Cavallo MC 8 145 1215
Pieve Torina MC 12 1458 2673
Muccia MC 13 915 3588
Valtopina PG 14 1398 4986
Sellano PG 14 1079 6065
Nocera Umbra PG 14 5839 11904
Fiordimonte MC 15 202 12106
Sefro MC 15 422 12528
Pievebovigliana MC 15 866 13394
Visso MC 17 1107 14501
Camerino MC 18 6974 21475
Foligno PG 18 57155 78630
Preci PG 19 724 79354
Pioraco MC 19 1134 80488
Fiuminata MC 19 1402 81890
Spello PG 20 8645 90535
Fiastra MC 20 559 91094

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
76 Km NW of Teramo (54892 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
92 Km S of Fano (60888 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
99 Km S of Pesaro (94582 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.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is 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
MLNET 5.6 1997-09-26
00:33:11
43.018 12.913 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 278479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-26 00:33:11 ± 0.186
Latitude 43.0180 ± 0.0049
Longitude 12.9130 ± 0.0156
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 278479

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) 1380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00170
Epicentral distance of station farthest from the epicenter (degree) 0.01319
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:5.6

Field Value
Value 5.6
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 278479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SDI.Z. 1997-09-26T00:33:38.91 10.0 undecidable manual PN 152 1.4652 0.65 0.1
--.CSNT.Z. 1997-09-26T00:33:36.30 10.0 undecidable manual PN 291 1.2543 0.53 0.2
--.FB9.Z. 1997-09-26T00:33:35.99 10.0 undecidable manual SG 351 0.6771 0.05 0.5
--.RDP.Z. 1997-09-26T00:33:35.58 10.0 undecidable manual PN 186 1.2543 0.06 1
--.MNS.Z. 1997-09-26T00:33:34.79 10.0 undecidable manual SG 194 0.6438 -0.3 0.3
--.RMP.Z. 1997-09-26T00:33:34.66 10.0 positive manual PN 187 1.2099 -0.16 1.8
--.RSM.Z. 1997-09-26T00:33:31.38 10.0 undecidable manual PG 339 0.9657 0.31 0.7
--.CRE.Z. 1997-09-26T00:33:29.93 10.0 undecidable manual PG 310 0.9213 -0.26 0.8
--.ARV.Z. 1997-09-26T00:33:29.51 10.0 undecidable manual SG 2 0.4773 -0.02 0.5
--.AQU.Z. 1997-09-26T00:33:27.90 10.0 negative manual PG 151 0.7437 0.02 2.7
--.FB9.Z. 1997-09-26T00:33:25.44 10.0 undecidable manual PG 351 0.6771 -0.28 0.8
--.MNS.Z. 1997-09-26T00:33:24.81 10.0 undecidable manual PG 194 0.6438 -0.42 0.5
--.ARV.Z. 1997-09-26T00:33:21.82 10.0 positive manual PG 2 0.4773 -0.2 2.1
--.ASS.Z. 1997-09-26T00:33:19.61 10.0 undecidable manual SG 283 0.1887 -0.15 0.5
--.ASS.Z. 1997-09-26T00:33:16.51 10.0 positive manual PG 283 0.1887 0.13 2.4
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, /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