INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.5 on date 15-11-2018 and time 08:35:55 (Italy) in region 1 km W Velletri (RM)

A magnitude ML 2.5 earthquake occured in region: 1 km W Velletri (RM), on

  • 15-11-2018 07:35:55 (UTC)
  • 15-11-2018 08:35:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.68, 12.76 at 11 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
Velletri RM 1 53303 53303
Lanuvio RM 5 13632 66935
Nemi RM 6 1943 68878
Genzano di Roma RM 7 23970 92848
Lariano RM 8 13432 106280
Ariccia RM 9 19407 125687
Rocca di Papa RM 10 17034 142721
Albano Laziale RM 10 41715 184436
Cisterna di Latina LT 11 36868 221304
Castel Gandolfo RM 12 8997 230301
Rocca Priora RM 12 11962 242263
Marino RM 13 43026 285289
Rocca Massima LT 13 1136 286425
Cori LT 13 11065 297490
Aprilia LT 14 73446 370936
Artena RM 14 14276 385212
Monte Compatri RM 14 11978 397190
Grottaferrata RM 14 20327 417517
Monte Porzio Catone RM 15 8693 426210
Frascati RM 15 22087 448297
Labico RM 15 6379 454676
San Cesareo RM 16 15153 469829
Valmontone RM 17 15959 485788
Colonna RM 17 4287 490075
Zagarolo RM 18 17843 507918
Ciampino RM 19 38412 546330
Ardea RM 20 49183 595513

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km W of Velletri (53303 inhabitants)
14 Km NE of Aprilia (73446 inhabitants)
22 Km E of Pomezia (62966 inhabitants)
27 Km NW of Latina (125985 inhabitants)
28 Km NE of Anzio (54211 inhabitants)
31 Km S of Tivoli (56533 inhabitants)
33 Km SE of Roma (2864731 inhabitants)
35 Km S of Guidonia Montecelio (88673 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
91 Km SW of L'Aquila (69753 inhabitants)
92 Km SE of Civitavecchia (52991 inhabitants)
98 Km S of Terni (111501 inhabitants)
98 Km SE of Viterbo (67173 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 2.5 2018-11-15
07:35:55
41.68 12.76 11 2018-11-15
07:56:59
Sala Sismica INGV-Roma 63081291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-15 07:35:55 ± 0.08
Latitude 41.68 ± 0.00
Longitude 12.76 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63081291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 775
Semi-minor axis of confidence ellipse (meter) 497
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.91011
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.5
Num. used stations 18
Type of magnitude ML
Reference to an origin 63081291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-11-15 07:56:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIAM.HHN. 2018-11-15T07:36:18.25 1.0 undecidable manual S 24 0.6403 50 0.75 19
IV.INTR.HHZ. 2018-11-15T07:36:12.64 0.3 undecidable manual P 69 0.9101 50 -0.39 60
IV.GUAR.HHZ. 2018-11-15T07:36:11.26 0.6 undecidable manual S 75 0.4236 50 0.18 46
IV.GIUL.HHZ. 2018-11-15T07:36:10.51 0.3 undecidable manual S 109 0.3876 50 0.5 65
IV.TOLF.HHZ. 2018-11-15T07:36:09.31 0.6 undecidable manual P 304 0.6835 50 0.15 44
IV.POFI.HHZ. 2018-11-15T07:36:09.48 1.0 negative manual P 87 0.7078 50 -0.09 22
IV.MTCE.HHE. 2018-11-15T07:36:08.35 0.6 undecidable manual S 357 0.339 50 -0.23 46
IV.FIAM.HHN. 2018-11-15T07:36:08.10 0.3 undecidable manual P 24 0.6403 50 -0.31 64
IV.PTQR.HHZ. 2018-11-15T07:36:07.46 0.3 undecidable manual P 54 0.5819 50 0.05 69
IV.SRES.HHZ. 2018-11-15T07:36:07.64 0.6 undecidable manual P 341 0.5837 50 0.19 45
IV.LATB.EHZ. 2018-11-15T07:36:05.05 0.6 undecidable manual S 142 0.241 50 -0.62 43
IV.GUAR.HHZ. 2018-11-15T07:36:04.50 0.3 undecidable manual P 75 0.4236 50 -0.2 69
IV.RCAV.EHZ. 2018-11-15T07:36:04.62 0.6 undecidable manual S 40 0.2113 50 -0.19 48
IV.GIUL.HHZ. 2018-11-15T07:36:04.08 0.3 undecidable manual P 109 0.3876 50 -0.01 72
IV.MTCE.HHE. 2018-11-15T07:36:03.03 0.6 undecidable manual P 357 0.339 50 -0.23 46
IV.RMP.HHZ. 2018-11-15T07:36:02.33 0.3 undecidable manual S 340 0.1349 126 -0.06 75
IV.LATB.EHZ. 2018-11-15T07:36:01.60 0.3 undecidable manual P 142 0.241 50 0.02 74
IV.RCAV.EHZ. 2018-11-15T07:36:01.31 0.3 undecidable manual P 40 0.2113 50 0.22 71
IV.LAV9.HHZ. 2018-11-15T07:36:00.02 0.3 undecidable manual S 263 0.0495 153 -0.15 75
IV.VIVA.HHZ. 2018-11-15T07:36:00.30 0.3 undecidable manual S 4 0.0665 145 -0.21 74
IV.RMP.HHZ. 2018-11-15T07:36:00.19 0.3 undecidable manual P 340 0.1349 126 0.5 68
IV.RDP.HHZ. 2018-11-15T07:36:00.74 0.3 undecidable manual S 332 0.0863 138 -0.24 73
IV.RDP.HHZ. 2018-11-15T07:35:59.04 0.1 negative manual P 332 0.0863 138 0.16 99
IV.MA9.HHZ. 2018-11-15T07:35:59.32 0.3 undecidable manual P 318 0.116 130 -0.04 76
IV.LAV9.HHZ. 2018-11-15T07:35:58.55 0.1 undecidable manual P 263 0.0495 153 0.15 100
IV.VIVA.HHZ. 2018-11-15T07:35:58.72 0.1 undecidable manual P 4 0.0665 145 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LAV9.HNE. ML:2.7 0.0083761435 0.3136 AML other m 2018-11-15T07:36:04.61
IV.LAV9.HHE. ML:2.7 0.0084557865 0.32 AML other m 2018-11-15T07:36:04.60
IV.LAV9.HHN. ML:3 0.01466419 0.4224 AML other m 2018-11-15T07:36:01.14
IV.LAV9.HNN. ML:2.9 0.01374847 0.4224 AML other m 2018-11-15T07:36:01.13
IV.VIVA.HHE. ML:2.7 0.0076005065 0.4416 AML other m 2018-11-15T07:36:00.78
IV.VIVA.HHN. ML:3 0.01290159 0.2176 AML other m 2018-11-15T07:36:00.50
IV.RDP.HHN. ML:3 0.011275405 0.3392 AML other m 2018-11-15T07:36:01.17
IV.RDP.HHE. ML:2.6 0.004415134 0.3008 AML other m 2018-11-15T07:36:00.99
IV.RMP.HHN. ML:2.7 0.00421393 0.1408 AML other m 2018-11-15T07:36:02.50
IV.RMP.HHE. ML:2.7 0.0050350895 0.1216 AML other m 2018-11-15T07:36:02.50
IV.LATB.EHN. ML:0.7 2.7647075E-5 0.8384 AML other m 2018-11-15T07:36:07.78
IV.LATB.EHE. ML:0.9 4.674829E-5 0.32 AML other m 2018-11-15T07:36:05.16
IV.GIUL.HHN. ML:1.8 0.0001833529 0.4608 AML other m 2018-11-15T07:36:10.86
IV.GIUL.HHE. ML:1.6 0.000131698405 0.16 AML other m 2018-11-15T07:36:11.69
IV.GUAR.HHE. ML:1.6 0.000120827495 0.1792 AML other m 2018-11-15T07:36:12.85
IV.GUAR.HHN. ML:1.7 0.0001464077 0.1856 AML other m 2018-11-15T07:36:13.28
IV.PTQR.HHE. ML:1.4 4.313447E-5 0.2624 AML other m 2018-11-15T07:36:19.91
IV.PTQR.HHN. ML:1.4 4.5104875E-5 0.3648 AML other m 2018-11-15T07:36:17.89
IV.TOLF.HHE. ML:1.4 4.0090075E-5 0.3008 AML other m 2018-11-15T07:36:22.45
IV.TOLF.HHN. ML:1.4 4.146976E-5 0.48 AML other m 2018-11-15T07:36:21.70
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