Earthquake with magnitude of Md 2.5 on date 26-03-1985 and time 10:49:13 (UTC) in region 7 km SW Caldarola (MC)

A magnitude Md 2.5 earthquake occured in region: 7 km SW Caldarola (MC), on

  • 26-03-1985 10:49:13 (UTC)
  • 26-03-1985 11:49:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0990, 13.1670 at 10 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
Caldarola MC 7 1823 1823
Fiastra MC 7 559 2382
Acquacanina MC 8 121 2503
Cessapalombo MC 8 512 3015
Pievebovigliana MC 8 866 3881
Camporotondo di Fiastrone MC 9 563 4444
Serrapetrona MC 9 966 5410
Camerino MC 9 6974 12384
Fiordimonte MC 9 202 12586
Belforte del Chienti MC 9 1886 14472
Muccia MC 10 915 15387
Pieve Torina MC 11 1458 16845
San Ginesio MC 12 3498 20343
Bolognola MC 13 142 20485
Sarnano MC 13 3264 23749
Gualdo MC 14 815 24564
San Severino Marche MC 15 12726 37290
Castelraimondo MC 15 4587 41877
Tolentino MC 16 20069 61946
Ripe San Ginesio MC 17 852 62798
Colmurano MC 17 1263 64061
Pioraco MC 17 1134 65195
Ussita MC 17 444 65639
Serravalle di Chienti MC 18 1070 66709
Gagliole MC 18 620 67329
Monte Cavallo MC 18 145 67474
Sefro MC 18 422 67896
Sant'Angelo in Pontano MC 19 1436 69332
Visso MC 20 1107 70439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
63 Km E of Perugia (166134 inhabitants)
64 Km SW of Ancona (100861 inhabitants)
66 Km NW of Teramo (54892 inhabitants)
73 Km NE of Terni (111501 inhabitants)
84 Km S of Fano (60888 inhabitants)
85 Km N of L'Aquila (69753 inhabitants)
93 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.5 1985-03-26
10:49:13
43.099 13.167 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3669
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-26 10:49:13 ± 0.612
Latitude 43.0990 ± 0.0237
Longitude 13.1670 ± 0.0460
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3669

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) 4568.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 219
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.00712
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 3669
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-03-26T10:49:32.50 10.0 undecidable manual SG 197 0.0049 -0.5 0.4
--.MNS.Z. 1985-03-26T10:49:31.00 10.0 undecidable manual PG 206 0.0071 1.66 0.4
--.AS1.Z. 1985-03-26T10:49:27.50 10.0 undecidable manual SG 264 0.0033 0.01 0.9
--.PO9.Z. 1985-03-26T10:49:24.50 10.0 undecidable manual PG 197 0.0049 -0.24 1.5
--.AR1.Z. 1985-03-26T10:49:22.50 10.0 undecidable manual PG? 337 0.0039 -0.06 0.8
--.AS1.Z. 1985-03-26T10:49:21.50 10.0 undecidable manual PG 264 0.0033 -0.05 2.1
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