Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.0 on date 20-04-1985 and time 01:27:10 (Italy) in region NW Casola in Lunigiana (MS)

A magnitude Md 3.0 earthquake occured in region: NW Casola in Lunigiana (MS), on

  • 19-04-1985 23:27:10 (UTC)
  • 20-04-1985 01:27:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2040, 10.1730 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casola in Lunigiana MS 0 988 988
Minucciano LU 5 2102 3090
Fivizzano MS 5 7925 11015
Sillano Giuncugnano LU 11 1085 12100
Piazza al Serchio LU 11 2367 14467
Comano MS 11 714 15181
Licciana Nardi MS 13 4949 20130
Vagli Sotto LU 13 939 21069
Camporgiano LU 14 2176 23245
San Romano in Garfagnana LU 14 1410 24655
Fosdinovo MS 14 4883 29538
Careggine LU 15 564 30102
Carrara MS 15 63133 93235
Aulla MS 16 11263 104498
Ortonovo SP 17 8277 112775
Castelnuovo Magra SP 17 8415 121190
Tresana MS 18 2044 123234
Podenzana MS 18 2180 125414
Massa MS 19 69479 194893
Villa Collemandina LU 19 1334 196227
Bagnone MS 19 1887 198114
Sarzana SP 20 21976 220090

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NE of Carrara (63133 inhabitants)
19 Km N of Massa (69479 inhabitants)
29 Km E of La Spezia (93959 inhabitants)
38 Km N of Viareggio (62467 inhabitants)
48 Km NW of Lucca (89046 inhabitants)
57 Km NW of Pisa (89158 inhabitants)
66 Km SW of Reggio nell'Emilia (171345 inhabitants)
67 Km W of Pistoia (90315 inhabitants)
68 Km S of Parma (192836 inhabitants)
73 Km N of Livorno (159219 inhabitants)
78 Km SW of Modena (184973 inhabitants)
82 Km W of Prato (191150 inhabitants)
86 Km SW of Carpi (70699 inhabitants)
95 Km NW of Scandicci (50609 inhabitants)
99 Km W of Bologna (386663 inhabitants)
99 Km W of Firenze (382808 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 3.0 1985-04-19
23:27:10		 44.204 10.173 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 5019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-19 23:27:10 ± 0.198
Latitude 44.2040 ± 0.0161
Longitude 10.1730 ± 0.0190
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5019

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) 2347.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
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) 0.00486
Epicentral distance of station farthest from the epicenter (degree) 0.04169
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

Md:3.0

Field Value
Value 3.0
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 5019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.HAU.Z. 1985-04-19T23:29:13.20 10.0 undecidable manual SN 326 0.0417 2.21 0
--.LMR.Z. 1985-04-19T23:28:27.40 10.0 undecidable manual SN 253 0.0250 0.36 0.6
--.BN9.Z. 1985-04-19T23:28:25.00 10.0 undecidable manual SN 290 0.0236 1.7 0.1
--.FRF.Z. 1985-04-19T23:28:23.70 10.0 undecidable manual SN 257 0.0236 0.55 0.6
--.HAU.Z. 1985-04-19T23:28:20.20 10.0 undecidable manual PN 326 0.0417 0.19 1.2
--.CTI.Z. 1985-04-19T23:28:10.00 10.0 undecidable manual SN 29 0.0190 -1.18 0.3
--.STV.Z. 1985-04-19T23:28:09.80 10.0 undecidable manual SN 272 0.0183 0.52 0.7
--.CVF.Z. 1985-04-19T23:28:06.50 10.0 undecidable manual SN 210 0.0170 0.7 0.6
--.ROB.Z. 1985-04-19T23:28:02.00 10.0 undecidable manual SN 274 0.0148 1.93 0.1
--.IMP.Z. 1985-04-19T23:27:59.80 10.0 undecidable manual SN 261 0.0149 -0.58 0.7
--.SAL.Z. 1985-04-19T23:27:56.00 10.0 undecidable manual SN 10 0.0128 1.27 0.4
--.CH1.Z. 1985-04-19T23:27:55.50 10.0 undecidable manual SN 113 0.0125 1.31 0.3
--.FIN.Z. 1985-04-19T23:27:55.00 10.0 undecidable manual SN 271 0.0126 0.69 0.6
--.LMR.Z. 1985-04-19T23:27:54.70 10.0 undecidable manual PN 253 0.0250 0.07 1.7
--.BN9.Z. 1985-04-19T23:27:52.50 10.0 undecidable manual PN 290 0.0236 0.02 1.8
--.FRF.Z. 1985-04-19T23:27:52.70 10.0 undecidable manual PN 257 0.0236 0.3 1.7
--.ORO.Z. 1985-04-19T23:27:46.50 10.0 undecidable manual PN 313 0.0189 1.18 0.8
--.STV.Z. 1985-04-19T23:27:44.20 10.0 undecidable manual PN 272 0.0183 -0.18 2
--.CTI.Z. 1985-04-19T23:27:44.50 10.0 undecidable manual PN 29 0.0190 -0.98 1.1
--.CVF.Z. 1985-04-19T23:27:42.40 10.0 undecidable manual PN 210 0.0170 0.02 2.1
--.PCN.E. 1985-04-19T23:27:42.00 10.0 undecidable manual SG 337 0.0083 0.22 0.8
--.FIR.N. 1985-04-19T23:27:41.00 10.0 undecidable manual SG 118 0.0079 0.17 0.8
--.GEN.Z. 1985-04-19T23:27:40.80 10.0 undecidable manual SG 284 0.0081 -0.65 0.6
--.ROB.Z. 1985-04-19T23:27:38.70 10.0 undecidable manual PN 274 0.0148 -0.37 1.9
--.IMP.Z. 1985-04-19T23:27:38.20 10.0 undecidable manual PN 261 0.0149 -1.04 1.1
--.SAL.Z. 1985-04-19T23:27:35.00 10.0 undecidable manual PN 10 0.0128 -0.98 1.1
--.CH1.Z. 1985-04-19T23:27:35.50 10.0 undecidable manual PN 113 0.0125 -0.17 2.1
--.FIN.Z. 1985-04-19T23:27:34.90 10.0 undecidable manual PN 271 0.0126 -0.84 1.3
--.CK1.Z. 1985-04-19T23:27:34.50 10.0 undecidable manual PN 279 0.0123 -0.76 1.5
--.FIR.Z. 1985-04-19T23:27:29.50 10.0 undecidable manual PG 118 0.0079 1.54 0.5
--.PCN.Z. 1985-04-19T23:27:28.00 10.0 undecidable manual PG 337 0.0083 -0.51 1.8
--.GEN.Z. 1985-04-19T23:27:27.20 10.0 undecidable manual PG 284 0.0081 -1.11 1
--.PS9.Z. 1985-04-19T23:27:20.50 10.0 undecidable manual PG 152 0.0049 -1.08 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