ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 2.1 on date 22-03-2018 and time 03:33:24 (Italy) in region 2 km N Morolo (FR)

A magnitude ML 2.1 earthquake occured in region: 2 km N Morolo (FR), on

  • 22-03-2018 02:33:24 (UTC)
  • 22-03-2018 03:33:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.65, 13.2 at 8 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
Morolo FR 2 3257 3257
Sgurgola FR 5 2676 5933
Supino FR 5 4873 10806
Ferentino FR 6 21213 32019
Gorga RM 7 710 32729
Patrica FR 8 3171 35900
Carpineto Romano RM 11 4524 40424
Anagni FR 11 21464 61888
Fumone FR 11 2102 63990
Frosinone FR 13 46323 110313
Gavignano RM 13 1916 112229
Montelanico RM 13 2131 114360
Giuliano di Roma FR 14 2400 116760
Roccagorga LT 15 4591 121351
Alatri FR 15 28952 150303
Maenza LT 15 3074 153377
Ceccano FR 15 23565 176942
Trivigliano FR 15 1705 178647
Segni RM 15 9159 187806
Acuto FR 16 1920 189726
Prossedi LT 16 1202 190928
Torre Cajetani FR 16 1376 192304
Torrice FR 17 4816 197120
Fiuggi FR 17 10536 207656
Arnara FR 18 2309 209965
Villa Santo Stefano FR 18 1720 211685
Bassiano LT 18 1583 213268
Colleferro RM 18 21595 234863
Vico nel Lazio FR 18 2234 237097
Collepardo FR 19 968 238065
Veroli FR 19 20560 258625
Guarcino FR 19 1623 260248
Roccasecca dei Volsci LT 19 1146 261394
Ripi FR 20 5270 266664
Priverno LT 20 14525 281189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Latina (125985 inhabitants)
35 Km E of Velletri (53303 inhabitants)
46 Km E of Aprilia (73446 inhabitants)
48 Km SE of Tivoli (56533 inhabitants)
53 Km E of Anzio (54211 inhabitants)
55 Km SE of Guidonia Montecelio (88673 inhabitants)
58 Km E of Pomezia (62966 inhabitants)
65 Km E of Roma (2864731 inhabitants)
80 Km S of L'Aquila (69753 inhabitants)
81 Km E of Fiumicino (78395 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.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. 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 2018-03-22
02:33:24
41.65 13.2 8 2018-03-22
02:53:39
Sala Sismica INGV-Roma 54753801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-03-22 02:33:24 ± 0.08
Latitude 41.65 ± 0.00
Longitude 13.20 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 54753801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 424
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 184
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.77611
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 54753801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-03-22 02:53:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SRES.HHZ. 2018-03-22T02:33:50.83 0.3 undecidable manual S 319 0.7761 50 0.38 64
IV.IFOR.HHZ. 2018-03-22T02:33:46.01 3.0 undecidable manual P 0.82 0
IV.MTCE.HHZ. 2018-03-22T02:33:42.67 0.6 undecidable manual S 318 0.5018 50 0.34 45
IV.RMP.HHZ. 2018-03-22T02:33:40.06 0.3 undecidable manual S 293 0.4029 50 0.68 62
IV.SRES.HHZ. 2018-03-22T02:33:39.30 0.6 undecidable manual P 319 0.7761 50 -0.13 45
IV.POFI.HHZ. 2018-03-22T02:33:39.64 0.6 undecidable manual S 80 0.3885 50 0.69 42
IV.PTQR.HHZ. 2018-03-22T02:33:38.77 0.6 undecidable manual S 22 0.3975 50 -0.47 45
IV.VVLD.HHZ. 2018-03-22T02:33:38.28 0.6 undecidable manual S 55 0.3831 50 -0.52 44
IV.CERT.HHZ. 2018-03-22T02:33:37.54 0.6 undecidable manual S 331 0.3372 50 0.1 49
IV.VIVA.HHZ. 2018-03-22T02:33:37.72 0.3 undecidable manual S 287 0.3345 50 0.36 70
IV.LIK.EHZ.01 2018-03-22T02:33:36.71 0.3 undecidable manual S 120 0.3103 50 0.07 75
IV.LRP.EHZ. 2018-03-22T02:33:36.05 0.3 undecidable manual S 91 0.2896 104 0.16 73
IV.RCAV.EHZ. 2018-03-22T02:33:35.28 0.3 undecidable manual S 316 0.2707 105 0.09 75
IV.MTCE.HHZ. 2018-03-22T02:33:34.21 0.1 undecidable manual P 318 0.5018 50 -0.53 86
IV.LATB.EHZ. 2018-03-22T02:33:33.32 0.6 undecidable manual S 228 0.2383 107 -0.66 43
IV.VVLD.HHZ. 2018-03-22T02:33:32.13 1.0 positive manual P 55 0.3831 50 -0.57 22
IV.PTQR.HHZ. 2018-03-22T02:33:32.67 1.0 negative manual P 22 0.3975 50 -0.29 23
IV.RMP.HHZ. 2018-03-22T02:33:32.92 0.6 positive manual P 293 0.4029 50 -0.12 48
IV.POFI.HHZ. 2018-03-22T02:33:32.74 0.1 undecidable manual P 80 0.3885 50 -0.05 98
IV.GUAR.HHZ. 2018-03-22T02:33:31.40 0.3 undecidable manual S 31 0.1646 114 0.07 77
IV.CERT.HHZ. 2018-03-22T02:33:31.29 0.3 negative manual P 331 0.3372 50 -0.62 65
IV.LIK.EHZ.01 2018-03-22T02:33:31.37 0.3 positive manual P 120 0.3103 50 -0.09 74
IV.VIVA.HHZ. 2018-03-22T02:33:31.85 0.1 undecidable manual P 287 0.3345 50 -0.02 100
IV.LRP.EHZ. 2018-03-22T02:33:30.78 0.6 negative manual P 91 0.2896 104 -0.24 48
IV.RCAV.EHZ. 2018-03-22T02:33:30.49 0.6 positive manual P 316 0.2707 105 -0.13 50
IV.LATB.EHZ. 2018-03-22T02:33:29.68 0.3 positive manual P 228 0.2383 107 -0.24 73
IV.GIUL.HHZ. 2018-03-22T02:33:29.50 0.3 undecidable manual S 156 0.1034 126 0.21 75
IV.GUAR.HHZ. 2018-03-22T02:33:28.62 0.1 negative manual P 31 0.1646 114 0.23 99
IV.GIUL.HHZ. 2018-03-22T02:33:27.49 0.1 negative manual P 156 0.1034 126 0.28 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIUL.HHN. ML:2.2 0.00214 1.26 AML other m 2018-03-22T02:33:29.21
IV.GIUL.HHE. ML:2.2 0.00189 0.62 AML other m 2018-03-22T02:33:30.07
IV.GUAR.HHN. ML:2.7 0.003985 0.42 AML other m 2018-03-22T02:33:34.65
IV.GUAR.HHE. ML:2.5 0.002565 0.42 AML other m 2018-03-22T02:33:35.65
IV.LATB.EHN. ML:1.6 0.000255 0.52 AML other m 2018-03-22T02:33:35.57
IV.LATB.EHE. ML:1.6 0.0002335 0.36 AML other m 2018-03-22T02:33:36.95
IV.RCAV.EHE. ML:2.2 0.00075 0.42 AML other m 2018-03-22T02:33:37.00
IV.RCAV.EHN. ML:2.2 0.0008465 0.3 AML other m 2018-03-22T02:33:37.61
IV.VVLD.HHN. ML:2.1 0.000405 1.74 AML other m 2018-03-22T02:33:38.06
IV.CERT.HHE. ML:2.2 0.000554 1.48 AML other m 2018-03-22T02:33:39.90
IV.PTQR.HHE. ML:2 0.0003165 0.78 AML other m 2018-03-22T02:33:39.25
IV.CERT.HHN. ML:2 0.0003545 0.36 AML other m 2018-03-22T02:33:39.87
IV.PTQR.HHN. ML:2 0.000284 1.44 AML other m 2018-03-22T02:33:39.18
IV.VIVA.HHE. ML:2.8 0.002325 1.7 AML other m 2018-03-22T02:33:40.01
IV.POFI.HHE. ML:2 0.000329 0.32 AML other m 2018-03-22T02:33:40.51
IV.VVLD.HHE. ML:2.2 0.0005745 0.78 AML other m 2018-03-22T02:33:40.86
IV.POFI.HHN. ML:1.9 0.000251 0.7 AML other m 2018-03-22T02:33:40.91
IV.VIVA.HHN. ML:2.8 0.002655 0.42 AML other m 2018-03-22T02:33:40.72
IV.RMP.HHN. ML:2.4 0.000841 1.26 AML other m 2018-03-22T02:33:43.95
IV.RMP.HHE. ML:2.3 0.000685 0.64 AML other m 2018-03-22T02:33:45.11
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