INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.1 on date 31-12-2018 and time 23:53:26 (UTC) in region 2 km W Pescasseroli (AQ)

A magnitude ML 2.1 earthquake occured in region: 2 km W Pescasseroli (AQ), on

  • 31-12-2018 23:53:26 (UTC)
  • 01-01-2019 00:53:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8, 13.76 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Pescasseroli AQ 3 2203 2203
Opi AQ 6 420 2623
Campoli Appennino FR 10 1725 4348
Pescosolido FR 10 1555 5903
San Donato Val di Comino FR 11 2107 8010
Alvito FR 12 2713 10723
Posta Fibreno FR 13 1139 11862
Bisegna AQ 14 223 12085
Villavallelonga AQ 14 919 13004
Villetta Barrea AQ 14 653 13657
Vicalvi FR 14 783 14440
Broccostella FR 15 2741 17181
Sora FR 15 26144 43325
Scanno AQ 15 1847 45172
Civitella Alfedena AQ 15 296 45468
Gallinaro FR 16 1269 46737
Fontechiari FR 16 1303 48040
Settefrati FR 16 728 48768
Lecce nei Marsi AQ 16 1702 50470
Villalago AQ 17 568 51038
Balsorano AQ 17 3569 54607
Collelongo AQ 18 1233 55840
Gioia dei Marsi AQ 18 1989 57829
Picinisco FR 19 1218 59047
Casalvieri FR 19 2698 61745
Barrea AQ 20 726 62471
Casalattico FR 20 574 63045
Atina FR 20 4316 67361
Ortucchio AQ 20 1860 69221

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km SE of L'Aquila (69753 inhabitants)
70 Km SW of Chieti (51815 inhabitants)
80 Km E of Latina (125985 inhabitants)
82 Km E of Tivoli (56533 inhabitants)
83 Km E of Velletri (53303 inhabitants)
83 Km SW of Pescara (121014 inhabitants)
86 Km SW of Montesilvano (53738 inhabitants)
89 Km E of Guidonia Montecelio (88673 inhabitants)
93 Km NW of Caserta (76326 inhabitants)
95 Km E of Aprilia (73446 inhabitants)
96 Km S of Teramo (54892 inhabitants)
99 Km NW of Aversa (53047 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. 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
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 100 ML 2.1 2018-12-31
23:53:26
41.8 13.76 12 2019-01-01
00:06:13
Sala Sismica INGV-Roma 64407311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-31 23:53:26 ± 0.08
Latitude 41.80 ± 0.01
Longitude 13.76 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64407311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 113
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
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 29
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.67179
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 11
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 64407311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-01-01 00:06:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRE.HHZ. 2018-12-31T23:54:33.04 3.0 undecidable manual Sn -0.12 0
MN.CUC.HHZ. 2018-12-31T23:54:21.30 3.0 undecidable manual Sg 7.28 0
IV.HAGA.HHZ. 2018-12-31T23:54:19.06 3.0 undecidable manual Pn -2.66 0
IT.ORP.HGZ. 2018-12-31T23:53:50.62 3.0 undecidable manual Sg 2.25 0
IV.CIMA.HNZ. 2018-12-31T23:53:49.70 3.0 positive manual Pn -0.35 0
IV.LATB.EHZ. 2018-12-31T23:53:48.99 0.3 undecidable manual S 243 0.6718 91 -0.3 64
IV.CERT.HHZ. 2018-12-31T23:53:47.06 0.3 undecidable manual S 285 0.6007 91 -0.14 67
IV.MTMR.HNZ. 2018-12-31T23:53:46.38 3.0 undecidable manual Sn -1.08 0
IV.GIUL.HHZ. 2018-12-31T23:53:43.08 0.3 undecidable manual S 238 0.4497 91 0.36 66
IV.PTQR.HHZ. 2018-12-31T23:53:40.20 0.6 undecidable manual S 310 0.3507 92 0.43 45
IV.RNI2.HHZ. 2018-12-31T23:53:39.07 0.6 undecidable manual S 108 0.3049 92 0.63 41
IV.GUAR.HHZ. 2018-12-31T23:53:39.44 0.3 undecidable manual S 269 0.3363 92 0.07 72
IV.LATB.EHZ. 2018-12-31T23:53:39.44 0.1 undecidable manual P 243 0.6718 91 -0.41 84
IV.CERT.HHZ. 2018-12-31T23:53:38.38 0.1 undecidable manual P 285 0.6007 91 -0.25 88
IV.CERA.HHZ. 2018-12-31T23:53:37.15 0.3 undecidable manual S 137 0.2761 92 -0.44 68
IV.INTR.HHZ. 2018-12-31T23:53:36.01 0.3 undecidable manual S 26 0.2374 93 -0.41 68
IV.GIUL.HHZ. 2018-12-31T23:53:35.81 0.1 undecidable manual P 238 0.4497 91 -0.24 91
IV.LRP.EHZ. 2018-12-31T23:53:35.62 0.3 undecidable manual S 221 0.2014 94 0.26 71
IV.PTQR.HHZ. 2018-12-31T23:53:34.40 0.1 undecidable manual P 310 0.3507 92 0.05 96
IV.GUAR.HHZ. 2018-12-31T23:53:34.12 0.1 undecidable manual P 269 0.3363 92 0 97
IV.VVLD.HHZ. 2018-12-31T23:53:33.32 0.3 undecidable manual S 304 0.1268 108 0.14 74
IV.RNI2.HHZ. 2018-12-31T23:53:33.90 0.1 undecidable manual P 108 0.3049 92 0.32 91
IV.INTR.HHZ. 2018-12-31T23:53:32.36 0.1 undecidable manual P 26 0.2374 93 -0.05 98
IV.CERA.HHZ. 2018-12-31T23:53:32.97 0.1 undecidable manual P 137 0.2761 92 -0.12 97
IV.LRP.EHZ. 2018-12-31T23:53:31.96 0.1 undecidable manual P 221 0.2014 94 0.16 97
IT.OPI.HGZ. 2018-12-31T23:53:31.28 0.3 undecidable manual S 114 0.054 144 -0.18 74
IV.VVLD.HHZ. 2018-12-31T23:53:30.77 0.1 undecidable manual P 304 0.1268 108 0.23 97
IT.OPI.HGZ. 2018-12-31T23:53:29.70 0.1 undecidable manual P 114 0.054 144 0.15 100
IV.VITU.HNZ. 2018-12-31T23:53:29.33 3.0 undecidable manual P -0.93 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERA.HNN. ML:2 0.000423 0.7 AML other m 2018-12-31T23:53:38.05
IV.INTR.HNE. ML:2.3 0.001075 0.56 AML other m 2018-12-31T23:53:36.28
IV.INTR.HHE. ML:2.1 0.000751 1.06 AML other m 2018-12-31T23:53:36.56
IV.INTR.HHN. ML:2.4 0.00129 1.06 AML other m 2018-12-31T23:53:36.64
IV.CERA.HHN. ML:2 0.0004325 0.7 AML other m 2018-12-31T23:53:38.40
IV.CERA.HHE. ML:2.1 0.000549 0.82 AML other m 2018-12-31T23:53:38.40
IV.CERA.HNE. ML:2 0.0005295 0.8 AML other m 2018-12-31T23:53:38.41
IV.INTR.HNN. ML:2.4 0.001215 0.64 AML other m 2018-12-31T23:53:39.24
IV.VVLD.HHN. ML:2.2 0.0013518675 0.2304 AML other m 2018-12-31T23:53:36.32
IV.LRP.EHN. ML:2.1 0.000775181 0.2432 AML other m 2018-12-31T23:53:36.19
IV.LRP.EHE. ML:1.9 0.0005689649 0.2432 AML other m 2018-12-31T23:53:36.41
IV.GUAR.HHN. ML:2.1 0.00044809435 0.2176 AML other m 2018-12-31T23:53:40.01
IV.GUAR.HHE. ML:2 0.0003404754 0.3584 AML other m 2018-12-31T23:53:40.04
IV.PTQR.HHE. ML:1.7 0.0001953034 0.2176 AML other m 2018-12-31T23:53:42.09
IV.PTQR.HHN. ML:1.9 0.0002706128 0.3584 AML other m 2018-12-31T23:53:40.79
IV.GIUL.HHN. ML:2.1 0.0002961316 0.2048 AML other m 2018-12-31T23:53:43.86
IV.GIUL.HHE. ML:2 0.0002544247 0.2176 AML other m 2018-12-31T23:53:43.82
IV.CERT.HHN. ML:2.2 0.00025663555 0.256 AML other m 2018-12-31T23:53:48.72
IV.CERT.HHE. ML:2.2 0.00030496085 0.2048 AML other m 2018-12-31T23:53:48.65
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://cnt.rm.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in full SEED format Download