Sala Sismica

Earthquake with magnitude of 2.0 on date 20-03-2017 and time 18:41:33 (UTC) in region L'Aquila

A magnitude ML 2.0 earthquake occured in the L'Aquila region on

  • 20-03-2017 18:41:33 (UTC)
  • 20-03-2017 19:41:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.57, 13.34 at 10 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 2011).
Municipality Region Dist Inh Cum Inh
Campotosto AQ 3 586 586
Capitignano AQ 6 680 1266
Amatrice RI 8 2646 3912
Montereale AQ 9 2812 6724
Crognaleto TE 12 1416 8140
Barete AQ 14 679 8819
Pizzoli AQ 15 3773 12592
Cortino TE 15 683 13275
Cagnano Amiterno AQ 15 1383 14658
Cittareale RI 15 470 15128
Accumoli RI 16 653 15781
Fano Adriano TE 17 354 16135
Borbona RI 18 650 16785
Pietracamela TE 19 304 17089

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of L'Aquila (66964 inhabitants)
32 Km W of Teramo (54294 inhabitants)
57 Km E of Terni (109193 inhabitants)
67 Km W of Montesilvano (50413 inhabitants)
67 Km SE of Foligno (56045 inhabitants)
72 Km W of Chieti (51484 inhabitants)
73 Km W of Pescara (117166 inhabitants)
81 Km NE of Tivoli (52910 inhabitants)
81 Km NE of Guidonia Montecelio (81447 inhabitants)
98 Km SE of Perugia (162449 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 ( 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.
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 ( 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 Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Published time (UTC) Author Location ID
Rev 100 2017-03-20
42.57 13.34 ML 2.0 10 2017-03-20
Sala Sismica INGV-Roma 42702541
Best location and best magnitude until now.
Origin information


Field Value
Time (UTC) 2017-03-20 18:41:33 ± 0.03
Latitude 42.57 ± 0.00
Longitude 13.34 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42702541


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 230
Semi-minor axis of confidence ellipse (meter) 202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 217
Circular confidence region, given by single value of horizontal uncertainty (meter) 230
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3966
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 19
Magnitude information


Field Value
Value 2
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 42702541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-20 18:56:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2017-03-20T18:41:47.68 3.0 undecidable manual P 0.25 0
IV.T1219.EHZ. 2017-03-20T18:41:44.58 3.0 undecidable manual P -0.24 0
IV.CERT.HHZ. 2017-03-20T18:41:48.50 3.0 undecidable manual P 1.28 0
IV.EL6.EHZ. 2017-03-20T18:41:48.87 3.0 positive manual P -0.32 0
IV.SNTG.HHZ. 2017-03-20T18:41:48.50 3.0 positive manual P -0.03 0
IV.INTR.HHZ. 2017-03-20T18:41:47.40 3.0 positive manual P -0.42 0
IV.T1211.EHZ. 2017-03-20T18:41:41.22 0.6 positive manual P 264 0.3561 50 -0.15 47
IV.T1217.EHZ. 2017-03-20T18:41:40.76 0.6 undecidable manual P 296 0.3301 50 -0.17 48
IV.MMO1.EHZ. 2017-03-20T18:41:40.90 0.1 negative manual P 359 0.3292 50 -0.02 98
IV.T1220.EHZ. 2017-03-20T18:41:45.09 3.0 negative manual P -0.23 0
IV.T1241.EHZ. 2017-03-20T18:41:40.29 0.3 positive manual P 14 0.295 50 -0.04 74
IV.MOMA.HHZ. 2017-03-20T18:41:45.84 3.0 negative manual P -0.16 0
IV.T1222.EHZ. 2017-03-20T18:41:39.95 0.1 undecidable manual P 233 0.2779 50 -0.08 98
IV.GUMA.HHZ. 2017-03-20T18:41:44.34 3.0 negative manual P 0.41 0
IV.T1212.EHZ. 2017-03-20T18:41:39.95 0.6 negative manual P 310 0.2806 50 -0.14 48
IV.OFFI.HHZ. 2017-03-20T18:41:44.14 3.0 negative manual P 0.98 0
IV.FDMO.HHZ. 2017-03-20T18:41:43.82 3.0 negative manual P -0.22 0
IV.T0110.HHZ. 2017-03-20T18:41:43.82 3.0 negative manual P 0.2 0
IV.VCEL.EHZ. 2017-03-20T18:41:43.23 3.0 negative manual P 0.67 0
IV.T1256.HHZ. 2017-03-20T18:41:42.88 3.0 negative manual P -0.13 0
IV.GIGS.HHZ. 2017-03-20T18:41:38.72 0.1 undecidable manual P 124 0.2095 113 -0.1 99
IV.T1216.EHZ. 2017-03-20T18:41:42.14 1.0 negative manual P 324 0.3966 50 0.08 24
IV.TERO.HHZ. 2017-03-20T18:41:38.74 0.1 undecidable manual P 75 0.2041 114 0.04 100
IV.T1218.EHZ. 2017-03-20T18:41:38.34 0.6 positive manual P 302 0.1907 115 -0.09 50
IV.FIAM.HHZ. 2017-03-20T18:41:41.45 3.0 negative manual P 0.35 0
IV.FAGN.HHZ. 2017-03-20T18:41:41.33 3.0 negative manual P -0.13 0
IV.MC2.EHZ. 2017-03-20T18:41:41.56 0.3 positive manual P 343 0.3579 50 0.15 71
IV.T1245.HHZ. 2017-03-20T18:41:40.66 1.0 positive manual P 339 0.3067 50 0.13 24
IV.T1247.HHZ. 2017-03-20T18:41:37.52 0.1 negative manual P 192 0.1313 125 0.25 97
IV.RM33.EHZ. 2017-03-20T18:41:37.03 0.1 positive manual P 236 0.1079 130 0.16 99
MN.AQU.HHZ. 2017-03-20T18:41:39.12 0.3 negative manual P 167 0.2212 112 0.06 74
IV.T1214.EHZ. 2017-03-20T18:41:38.96 0.3 negative manual P 334 0.2113 113 0.11 74
IV.T1299.EHZ. 2017-03-20T18:41:36.46 1.0 undecidable manual P 328 0.0755 140 0.1 25
IV.CAMP.HHZ. 2017-03-20T18:41:36.40 0.1 undecidable manual P 122 0.0639 145 0.2 99
IV.SMA1.EHZ. 2017-03-20T18:41:36.39 0.1 undecidable manual P 359 0.0612 146 0.23 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.AQU.HLN. ML:1.9 0.000481 0.22 AML other m 2017-03-20T18:41:44.66
MN.AQU.HHN. ML:1.9 0.000504 0.24 AML other m 2017-03-20T18:41:44.54
MN.AQU.HLE. ML:1.8 0.000402 0.58 AML other m 2017-03-20T18:41:47.05
MN.AQU.HHE. ML:1.8 0.0004 0.58 AML other m 2017-03-20T18:41:47.05
IV.ASSB.HHN. ML:1.7 7.07E-5 0.22 AML other m 2017-03-20T18:41:59.62
IV.ASSB.HHE. ML:1.6 5.28E-5 1.16 AML other m 2017-03-20T18:42:04.71
IV.CAMP.HHE. ML:2.3 0.002785 1.74 AML other m 2017-03-20T18:41:37.00
IV.CAMP.HHN. ML:2.4 0.003865 0.3 AML other m 2017-03-20T18:41:38.97
IV.EL6.EHE. ML:1.9 9.255E-5 1.8 AML other m 2017-03-20T18:42:06.92
IV.EL6.EHN. ML:1.9 9.455E-5 0.42 AML other m 2017-03-20T18:42:09.09
IV.FAGN.HHE. ML:2.1 0.000487 0.36 AML other m 2017-03-20T18:41:50.36
IV.FAGN.HHN. ML:2 0.0003645 1.62 AML other m 2017-03-20T18:41:52.05
IV.FDMO.HHN. ML:1.7 0.00010965 0.72 AML other m 2017-03-20T18:41:53.53
IV.FDMO.HHE. ML:1.6 8.395E-5 0.16 AML other m 2017-03-20T18:41:53.74
IV.FIAM.HHN. ML:1.7 0.00018 0.88 AML other m 2017-03-20T18:41:47.04
IV.FIAM.HHE. ML:2 0.0003555 1.48 AML other m 2017-03-20T18:41:49.14
IV.GIGS.HHE. ML:1.7 0.000326 0.46 AML other m 2017-03-20T18:41:42.49
IV.GIGS.HHN. ML:1.3 0.00014 0.44 AML other m 2017-03-20T18:41:42.50
IV.GUMA.HHN. ML:2.2 0.000367 0.64 AML other m 2017-03-20T18:41:54.75
IV.GUMA.HHE. ML:2.3 0.0005305 0.34 AML other m 2017-03-20T18:41:54.69
IV.GUMA.HNN. ML:2.3 0.000441 0.38 AML other m 2017-03-20T18:41:54.70
IV.GUMA.HNE. ML:2.2 0.000411 0.66 AML other m 2017-03-20T18:41:55.46
IV.INTR.HNE. ML:0 3.69E-7 0.92 AML other m 2017-03-20T18:41:54.84
IV.INTR.HNN. ML:0 2.77E-7 0.4 AML other m 2017-03-20T18:41:52.51
IV.INTR.HHE. ML:1.5 4.63E-5 1.38 AML other m 2017-03-20T18:42:08.96
IV.INTR.HHN. ML:1.8 8.575E-5 1.12 AML other m 2017-03-20T18:42:03.07
IV.MOMA.HHN. ML:1.8 0.00010125 0.2 AML other m 2017-03-20T18:41:56.35
IV.MOMA.HHE. ML:1.8 0.000118 0.24 AML other m 2017-03-20T18:41:56.47
IV.OFFI.HHE. ML:2.1 0.000344 0.52 AML other m 2017-03-20T18:41:56.42
IV.OFFI.HHN. ML:2.2 0.000443 0.94 AML other m 2017-03-20T18:41:53.70
IV.RM33.HNE. ML:2.5 0.003415 1.32 AML other m 2017-03-20T18:41:39.91
IV.RM33.EHE. ML:2.5 0.003605 1.32 AML other m 2017-03-20T18:41:39.91
IV.RM33.HNN. ML:2.4 0.00299 1.1 AML other m 2017-03-20T18:41:40.89
IV.RM33.EHN. ML:2.4 0.002805 1.08 AML other m 2017-03-20T18:41:40.35
IV.SMA1.EHE. ML:3.2 0.02265 1.62 AML other m 2017-03-20T18:41:38.95
IV.SMA1.EHN. ML:3 0.01585 1.68 AML other m 2017-03-20T18:41:38.10
IV.SNTG.HHN. ML:1.5 4.085E-5 1.16 AML other m 2017-03-20T18:42:08.97
IV.SNTG.HHE. ML:1.3 2.585E-5 0.86 AML other m 2017-03-20T18:42:01.31
IV.T0110.HHE. ML:2 0.000257 0.62 AML other m 2017-03-20T18:41:52.44
IV.T0110.HHN. ML:1.9 0.000179 0.76 AML other m 2017-03-20T18:41:53.51
IV.T1211.EHN. ML:1.7 0.0001885 1.16 AML other m 2017-03-20T18:41:49.24
IV.T1211.EHE. ML:1.6 0.0001365 1.24 AML other m 2017-03-20T18:41:49.86
IV.T1212.EHE. ML:1.8 0.000305 0.56 AML other m 2017-03-20T18:41:47.39
IV.T1212.EHN. ML:1.8 0.0002855 0.64 AML other m 2017-03-20T18:41:47.22
IV.T1214.EHN. ML:1.8 0.0004285 0.4 AML other m 2017-03-20T18:41:47.28
IV.T1214.EHE. ML:1.9 0.0005565 0.38 AML other m 2017-03-20T18:41:46.67
IV.T1216.EHN. ML:2 0.0002815 0.5 AML other m 2017-03-20T18:41:51.67
IV.T1216.EHE. ML:1.9 0.000244 0.82 AML other m 2017-03-20T18:41:51.67
IV.T1217.EHE. ML:1.5 0.00011385 0.98 AML other m 2017-03-20T18:41:51.67
IV.T1217.EHN. ML:1.6 0.0001575 1.46 AML other m 2017-03-20T18:41:49.79
IV.T1218.EHN. ML:2.2 0.0012 0.36 AML other m 2017-03-20T18:41:41.92
IV.T1218.HNN. ML:2.2 0.00121 1.74 AML other m 2017-03-20T18:41:42.92
IV.T1218.HNE. ML:1.8 0.000465 1.14 AML other m 2017-03-20T18:41:43.13
IV.T1218.EHE. ML:1.8 0.000417 1.12 AML other m 2017-03-20T18:41:43.14
IV.T1219.EHE. ML:1.8 0.0001311 0.5 AML other m 2017-03-20T18:41:56.70
IV.T1219.HNN. ML:2 0.0001935 0.92 AML other m 2017-03-20T18:41:54.50
IV.T1219.EHN. ML:1.8 0.0001375 0.32 AML other m 2017-03-20T18:41:56.51
IV.T1219.HNE. ML:1.8 0.000145 0.56 AML other m 2017-03-20T18:41:57.43
IV.T1220.EHN. ML:2.3 0.0004215 0.2 AML other m 2017-03-20T18:41:56.41
IV.T1220.EHE. ML:2.4 0.0004405 0.7 AML other m 2017-03-20T18:41:59.40
IV.T1222.EHN. ML:1.9 0.0003785 0.26 AML other m 2017-03-20T18:41:44.66
IV.T1222.EHE. ML:1.9 0.0003435 0.4 AML other m 2017-03-20T18:41:50.72
IV.T1241.EHE. ML:1.8 0.000291 1.4 AML other m 2017-03-20T18:41:47.98
IV.T1241.EHN. ML:1.8 0.000262 1.26 AML other m 2017-03-20T18:41:47.06
IV.T1245.HHE. ML:2 0.000427 1.18 AML other m 2017-03-20T18:41:49.35
IV.T1245.HHN. ML:2.1 0.0005565 0.3 AML other m 2017-03-20T18:41:50.54
IV.T1245.HNN. ML:2.2 0.000609 0.8 AML other m 2017-03-20T18:41:48.48
IV.T1245.HNE. ML:2 0.0003865 0.8 AML other m 2017-03-20T18:41:48.80
IV.T1247.HHE. ML:2.5 0.00315 0.38 AML other m 2017-03-20T18:41:40.23
IV.T1247.HHN. ML:2.5 0.002815 0.76 AML other m 2017-03-20T18:41:41.49
IV.T1256.HHN. ML:1.7 0.0001455 0.16 AML other m 2017-03-20T18:41:51.48
IV.T1256.HHE. ML:1.7 0.0001425 1.6 AML other m 2017-03-20T18:41:50.00
IV.T1299.HNN. ML:2.2 0.00211 0.64 AML other m 2017-03-20T18:41:38.54
IV.T1299.HNE. ML:2.2 0.002405 0.4 AML other m 2017-03-20T18:41:38.48
IV.T1299.EHE. ML:2.2 0.0024 0.38 AML other m 2017-03-20T18:41:38.48
IV.T1299.EHN. ML:2.2 0.00206 0.66 AML other m 2017-03-20T18:41:38.55
IV.TERO.HNN. ML:2.2 0.0010575 0.36 AML other m 2017-03-20T18:41:42.30
IV.TERO.HHN. ML:2.2 0.001115 0.36 AML other m 2017-03-20T18:41:42.30
IV.TERO.HHE. ML:2.3 0.001375 0.38 AML other m 2017-03-20T18:41:42.28
IV.TERO.HNE. ML:2.3 0.00129 0.38 AML other m 2017-03-20T18:41:42.28
IV.VCEL.EHE. ML:2.2 0.0004635 0.44 AML other m 2017-03-20T18:41:51.64
IV.VCEL.EHN. ML:2.2 0.0004895 1.02 AML other m 2017-03-20T18:41:52.74
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, 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, This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
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