Earthquake with magnitude of ML 2.1 on date 17-09-2018 and time 14:57:45 (UTC) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 2.1 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 17-09-2018 14:57:45 (UTC)
  • 17-09-2018 16:57:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.2 at 11 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Arquata del Tronto AP 9 1178 1178
Norcia PG 9 4957 6135
Castelsantangelo sul Nera MC 11 281 6416
Montegallo AP 12 523 6939
Accumoli RI 12 667 7606
Montemonaco AP 15 604 8210
Preci PG 16 724 8934
Ussita MC 17 444 9378
Visso MC 17 1107 10485
Acquasanta Terme AP 18 2916 13401
Cascia PG 18 3217 16618
Montefortino FM 20 1178 17796

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
44 Km W of Teramo (54892 inhabitants)
52 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
94 Km NW of Chieti (51815 inhabitants)
95 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km NE of Tivoli (56533 inhabitants)
99 Km E 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
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 1000 ML 2.1 2018-09-17
14:57:45
42.8 13.2 11 2019-06-04
09:16:12
Bollettino Sismico Italiano INGV 67331941
Rev 100 ML 2.1 2018-09-17
14:57:45
42.8 13.18 11 2018-09-17
15:03:44
Sala Sismica INGV-Roma 61040091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-17 14:57:45 ± 0.06
Latitude 42.80 ± 0.00
Longitude 13.20 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 67331941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44157
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 61040091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-17 15:03:44

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 67331941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-07 09:15:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2018-09-17T14:58:19.28 3.0 undecidable manual S -0.78 0
IV.ARVD.HHZ. 2018-09-17T14:58:11.52 3.0 undecidable manual S -0.05 0
IV.MURB.HHZ. 2018-09-17T14:58:10.69 3.0 undecidable manual S 0.67 0
IV.VCEL.EHZ. 2018-09-17T14:58:07.20 3.0 undecidable manual S -0.99 0
IV.BADI.EHZ. 2018-09-17T14:58:04.54 3.0 undecidable manual P 0.32 0
IV.FIAM.HHZ. 2018-09-17T14:58:04.90 3.0 undecidable manual S -0.35 0
IV.OFFI.HHZ. 2018-09-17T14:58:01.74 3.0 undecidable manual S 1.47 0
IV.ARVD.HHZ. 2018-09-17T14:58:00.19 3.0 positive manual P 0.05 0
IV.SSFR.HHZ. 2018-09-17T14:57:59.89 3.0 undecidable manual P 0.08 0
IV.MML1.HNE. 2018-09-17T14:57:59.10 0.6 undecidable manual S 332 0.3552 50 0.08 48
IV.PF6.EHN. 2018-09-17T14:57:58.25 0.6 undecidable manual S 359 0.3381 50 -0.26 46
IV.GUMA.HHZ. 2018-09-17T14:57:57.17 0.1 undecidable manual S 21 0.2806 50 0.36 91
IV.RM33.EHZ. 2018-09-17T14:57:57.42 0.6 undecidable manual S 178 0.2905 50 0.31 46
IV.CESI.HHZ. 2018-09-17T14:57:57.45 0.1 undecidable manual S 314 0.2977 50 0.13 96
IV.MF5.EHZ. 2018-09-17T14:57:57.35 0.1 undecidable manual S 45 0.2671 50 0.93 74
IV.ATCC.EHZ. 2018-09-17T14:57:57.46 3.0 negative manual P 0.28 0
IV.CAMP.HHZ. 2018-09-17T14:57:57.37 0.1 undecidable manual S 150 0.3049 50 -0.17 95
IV.EL6.EHZ. 2018-09-17T14:57:56.47 3.0 negative manual P -0.22 0
IV.SNTG.HHZ. 2018-09-17T14:57:56.05 3.0 negative manual P 0.12 0
IV.FIAM.HHZ. 2018-09-17T14:57:56.46 3.0 positive manual P -0.13 0
IV.CSP1.EHZ. 2018-09-17T14:57:56.88 3.0 undecidable manual S -0.45 0
IV.FDMO.HHZ. 2018-09-17T14:57:55.58 0.1 undecidable manual S 341 0.2509 50 -0.34 92
IV.ASSB.HHZ. 2018-09-17T14:57:55.47 3.0 positive manual P 0.07 0
IV.LNSS.HHZ. 2018-09-17T14:57:55.62 0.6 undecidable manual S 211 0.2293 50 0.35 46
IV.GIGS.HHZ. 2018-09-17T14:57:54.76 0.1 undecidable manual P 141 0.4416 50 -0.22 91
IV.SMA1.EHZ. 2018-09-17T14:57:54.15 0.1 undecidable manual S 149 0.1961 50 -0.16 97
IV.ARRO.EHZ. 2018-09-17T14:57:54.12 3.0 undecidable manual P 0.25 0
IV.FEMA.HNZ. 2018-09-17T14:57:54.16 0.1 undecidable manual S 326 0.1961 50 -0.14 97
IV.OFFI.HHZ. 2018-09-17T14:57:54.48 3.0 undecidable manual P 0.25 0
IV.MML1.HNE. 2018-09-17T14:57:53.32 0.1 positive manual P 332 0.3552 50 -0.18 94
IV.MDAR.HNN. 2018-09-17T14:57:53.91 0.1 undecidable manual P 354 0.3948 50 -0.27 91
IV.TERO.HHZ. 2018-09-17T14:57:53.36 0.1 undecidable manual P 121 0.3453 50 0.03 97
IV.T1299.EHZ. 2018-09-17T14:57:53.92 0.1 undecidable manual S 160 0.1763 119 0.21 96
IV.CESI.HHZ. 2018-09-17T14:57:52.42 0.1 positive manual P 314 0.2977 50 -0.1 96
IV.MF5.EHZ. 2018-09-17T14:57:52.08 0.1 positive manual P 45 0.2671 50 0.08 97
IV.CAMP.HHZ. 2018-09-17T14:57:52.51 0.1 negative manual P 150 0.3049 50 -0.14 95
IV.MMO1.EHZ. 2018-09-17T14:57:52.12 0.6 undecidable manual S 43 0.1367 125 -0.29 48
IV.CSP1.EHZ. 2018-09-17T14:57:52.19 3.0 undecidable manual P -0.35 0
IV.MTRA.HNZ. 2018-09-17T14:57:52.45 0.6 undecidable manual S 107 0.1502 123 -0.41 46
IV.GUMA.HHZ. 2018-09-17T14:57:52.30 0.1 positive manual P 21 0.2806 50 0.07 97
IV.RM33.EHZ. 2018-09-17T14:57:52.34 0.1 positive manual P 178 0.2905 50 -0.06 97
IV.PF6.EHN. 2018-09-17T14:57:52.86 0.1 positive manual P 359 0.3381 50 -0.35 91
IV.MC2.EHZ. 2018-09-17T14:57:51.80 0.3 undecidable manual S 356 0.1115 131 0.13 74
IV.LNSS.HHZ. 2018-09-17T14:57:51.43 0.1 positive manual P 211 0.2293 50 0.09 98
OB.GAVE.EHZ. 2018-09-17T14:57:51.82 3.0 undecidable manual Pg 0.25 0
IV.FDMO.HHZ. 2018-09-17T14:57:51.46 0.1 positive manual P 341 0.2509 50 -0.25 94
IV.T1299.EHZ. 2018-09-17T14:57:50.63 0.1 undecidable manual P 160 0.1763 119 0.19 97
IV.SMA1.EHZ. 2018-09-17T14:57:50.72 0.1 negative manual P 149 0.1961 50 -0.06 99
IV.FEMA.HNZ. 2018-09-17T14:57:50.78 0.1 undecidable manual P 326 0.1961 50 0 100
IV.NRCA.HNZ. 2018-09-17T14:57:50.84 0.6 undecidable manual S 298 0.071 144 0.24 49
IV.MC2.EHZ. 2018-09-17T14:57:49.47 0.1 positive manual P 356 0.1115 131 0.21 97
IV.MMO1.EHZ. 2018-09-17T14:57:49.61 0.1 positive manual P 43 0.1367 125 -0.08 100
IV.MTRA.HNZ. 2018-09-17T14:57:49.85 0.1 negative manual P 107 0.1502 123 -0.1 99
IV.NRCA.HNZ. 2018-09-17T14:57:48.95 0.1 negative manual P 298 0.071 144 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:3.3 0.02832214 1.8464 AML other m 2018-09-17T14:57:51.00
IV.NRCA.HHE. ML:3.3 0.03036462 1.8464 AML other m 2018-09-17T14:57:51.00
IV.NRCA.HNN. ML:3 0.012771135 0.1024 AML other m 2018-09-17T14:57:51.57
IV.NRCA.HHN. ML:3 0.0147623 0.1024 AML other m 2018-09-17T14:57:51.57
IV.MTRA.EHE. ML:2.3 0.001782072 0.1408 AML other m 2018-09-17T14:57:52.92
IV.MTRA.HNE. ML:2.3 0.0018132915 0.128 AML other m 2018-09-17T14:57:52.92
IV.MTRA.HNN. ML:2.4 0.0022563145 1.744 AML other m 2018-09-17T14:57:52.99
IV.MTRA.EHN. ML:2.4 0.002270709 1.744 AML other m 2018-09-17T14:57:52.99
IV.SMA1.EHE. ML:2 0.0006669802 0.1024 AML other m 2018-09-17T14:57:54.46
IV.SMA1.EHN. ML:2.2 0.0010223001 0.2176 AML other m 2018-09-17T14:57:54.80
IV.FDMO.HHN. ML:2.2 0.00082256225 0.1792 AML other m 2018-09-17T14:57:55.86
OB.GAVE.EHE. ML:0 0.0010084111 0.1536 AML other m 2018-09-17T14:57:56.53
IV.LNSS.HHE. ML:2.3 0.0011112645 0.1408 AML other m 2018-09-17T14:57:56.64
IV.FDMO.HHE. ML:2 0.0004623821 0.1536 AML other m 2018-09-17T14:57:56.67
OB.GAVE.EHN. ML:0 0.0009166216 0.1792 AML other m 2018-09-17T14:57:56.00
IV.CSP1.EHN. ML:2.2 0.00070577455 0.2176 AML other m 2018-09-17T14:57:57.13
IV.GUMA.HHE. ML:2.9 0.0035112125 0.2432 AML other m 2018-09-17T14:57:57.47
IV.GUMA.HNN. ML:2.8 0.002915372 0.2944 AML other m 2018-09-17T14:57:57.60
IV.GUMA.HHN. ML:2.6 0.0020311365 0.3968 AML other m 2018-09-17T14:57:57.45
IV.CAMP.HHE. ML:1.8 0.0002711446 0.1792 AML other m 2018-09-17T14:57:57.68
IV.RM33.HNN. ML:2.1 0.0005445329 0.2304 AML other m 2018-09-17T14:57:57.91
IV.RM33.EHN. ML:2.1 0.00051142925 0.2176 AML other m 2018-09-17T14:57:57.91
IV.LNSS.HHN. ML:2.1 0.00070720475 0.2432 AML other m 2018-09-17T14:57:57.82
IV.CAMP.HHN. ML:2.1 0.00052029175 0.192 AML other m 2018-09-17T14:57:57.76
IV.CESI.HHN. ML:2.1 0.0005672295 0.1408 AML other m 2018-09-17T14:57:57.92
IV.RM33.HNE. ML:2.1 0.00053390945 0.1536 AML other m 2018-09-17T14:57:58.34
IV.RM33.EHE. ML:2.1 0.00052493365 0.1536 AML other m 2018-09-17T14:57:58.34
IV.CSP1.EHE. ML:2.2 0.00065843025 0.1664 AML other m 2018-09-17T14:57:58.41
IV.GUMA.HNE. ML:2.6 0.0020068105 1.6416 AML other m 2018-09-17T14:57:58.01
IV.CESI.HHE. ML:1.8 0.00029054215 0.0896 AML other m 2018-09-17T14:57:58.87
IV.TERO.HNN. ML:1.7 0.00017595515 0.1024 AML other m 2018-09-17T14:57:58.88
IV.TERO.HHN. ML:2 0.00036334285 0.128 AML other m 2018-09-17T14:57:58.94
IV.TERO.HHE. ML:1.9 0.0002672822 0.1152 AML other m 2018-09-17T14:57:59.44
IV.MF5.EHN. ML:1.8 0.00027623875 0.3456 AML other m 2018-09-17T14:58:01.76
IV.ARRO.EHE. ML:1.8 0.00020361265 0.1792 AML other m 2018-09-17T14:58:02.12
IV.GIGS.HHE. ML:1.2 4.7150335E-5 0.1536 AML other m 2018-09-17T14:58:02.41
IV.ASSB.HHE. ML:1.9 0.0002050343 1.8592 AML other m 2018-09-17T14:58:03.04
IV.OFFI.HHE. ML:0 0.0004885 0.32 AML other m 2018-09-17T14:58:03.20
IV.OFFI.HHN. ML:0 0.0008085 0.62 AML other m 2018-09-17T14:58:03.05
IV.GIGS.HHN. ML:1.2 3.810367E-5 0.1792 AML other m 2018-09-17T14:58:03.85
IV.ARRO.EHN. ML:1.8 0.00019154115 0.2048 AML other m 2018-09-17T14:58:03.76
IV.ASSB.HHN. ML:1.9 0.0001958054 1.7056 AML other m 2018-09-17T14:58:03.96
IV.MF5.EHE. ML:1.8 0.00031788155 0.64 AML other m 2018-09-17T14:58:04.33
IV.SNTG.HHE. ML:1.4 6.0256945E-5 0.1152 AML other m 2018-09-17T14:58:04.70
IV.SNTG.HNE. ML:1.8 0.0001418847 0.128 AML other m 2018-09-17T14:58:05.13
IV.SNTG.HHN. ML:1.7 0.0001113303 0.128 AML other m 2018-09-17T14:58:05.13
IV.EL6.EHE. ML:1.9 0.0001683868 0.1792 AML other m 2018-09-17T14:58:06.88
IV.ATCC.EHE. ML:1.8 0.000116957185 0.128 AML other m 2018-09-17T14:58:07.21
IV.ATCC.EHN. ML:1.9 0.0001546249 0.1792 AML other m 2018-09-17T14:58:07.85
IV.FIAM.HHE. ML:1.9 0.00017275475 0.576 AML other m 2018-09-17T14:58:08.31
IV.FIAM.HHN. ML:1.8 0.000137851495 1.7184 AML other m 2018-09-17T14:58:08.91
IV.EL6.EHN. ML:2 0.0002176946 0.1536 AML other m 2018-09-17T14:58:08.62
IV.SSFR.HHE. ML:2.1 0.00019194725 0.2048 AML other m 2018-09-17T14:58:11.62
IV.ARVD.HHE. ML:1.6 4.898918E-5 0.2432 AML other m 2018-09-17T14:58:12.87
IV.SSFR.HNE. ML:2.2 0.00021894665 0.192 AML other m 2018-09-17T14:58:13.66
IV.SSFR.HHN. ML:2.1 0.00019172675 0.1664 AML other m 2018-09-17T14:58:15.67
IV.SSFR.HNN. ML:2.2 0.00022476105 0.256 AML other m 2018-09-17T14:58:16.83
IV.ARVD.HHN. ML:1.6 4.9730395E-5 1.68 AML other m 2018-09-17T14:58:20.08
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://terremoti.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