Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 19-01-2016 and time 08:57:44 (UTC) in region 2 km SW Massa Martana (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km SW Massa Martana (PG), on

  • 19-01-2016 08:57:44 (UTC)
  • 19-01-2016 09:57:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 12.5040 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Massa Martana PG 2 3770 3770
Todi PG 8 16851 20621
Acquasparta TR 9 4778 25399
Giano dell'Umbria PG 10 3846 29245
Montecastrilli TR 13 5022 34267
Avigliano Umbro TR 13 2558 36825
Monte Castello di Vibio PG 15 1567 38392
Fratta Todina PG 15 1839 40231
Castel Ritaldi PG 15 3278 43509
Collazzone PG 16 3473 46982
Gualdo Cattaneo PG 17 6155 53137
San Gemini TR 17 5018 58155
Montefalco PG 19 5679 63834
Spoleto PG 20 38218 102052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Terni (111501 inhabitants)
27 Km SW of Foligno (57155 inhabitants)
39 Km S of Perugia (166134 inhabitants)
50 Km NE of Viterbo (67173 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
95 Km NE of Civitavecchia (52991 inhabitants)
97 Km N of Roma (2864731 inhabitants)
99 Km W of Teramo (54892 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.6 2016-01-19
08:57:44		 42.7637 12.5037 8 2016-05-17
13:16:21		 Bollettino Sismico Italiano INGV 23218191
Reviewed
Rev100 		ML 1.6 2016-01-19
08:57:44		 42.7683 12.5072 9 2016-01-19
09:08:40		 Sala Sismica INGV-Roma 23152511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-01-19 08:57:44 ± 0.08
Latitude 42.7637 ± 0.0036
Longitude 12.5037 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 23218191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 417
Semi-minor axis of confidence ellipse (meter) 304
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) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
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) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.71406
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 23218191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-01-24 13:00:54

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 23152511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-01-19 09:08:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HNN. 2016-01-19T08:58:09.20 1.0 undecidable manual S 325 76.368 50 0.77 19
IV.ATPI.EHE. 2016-01-19T08:58:09.13 0.6 undecidable manual S 354 76.6677 50 0.63 40
IV.EL6.EHE. 2016-01-19T08:58:09.98 0.6 undecidable manual S 37 79.2651 50 0.78 37
IV.SSFR.HHN. 2016-01-19T08:58:09.18 0.6 undecidable manual S 17 77.9664 50 0.34 43
IV.FIAM.HHN. 2016-01-19T08:58:08.22 1.0 undecidable manual S 137 74.37 50 0.32 22
IV.SMA1.EHZ. 2016-01-19T08:58:07.00 0.6 undecidable manual S 102 69.375 50 0.45 43
IV.ATVO.HHN. 2016-01-19T08:58:07.23 0.6 undecidable manual S 353 69.0753 50 0.76 38
IV.CSP1.EHE. 2016-01-19T08:58:06.26 0.3 undecidable manual S 57 67.5768 50 0.18 68
IV.ATMI.HHZ. 2016-01-19T08:58:05.49 1.0 undecidable manual S 343 66.0894 50 -0.19 23
IV.SRES.HHN. 2016-01-19T08:58:04.42 1.0 undecidable manual S 179 58.3971 50 0.79 19
IV.MURB.HHE. 2016-01-19T08:58:02.56 1.0 undecidable manual S 2 55.4001 50 -0.27 23
IV.FDMO.HHZ. 2016-01-19T08:58:02.76 0.6 undecidable manual S 57 56.2992 50 -0.29 45
IV.NRCA.HHZ. 2016-01-19T08:58:01.05 0.6 undecidable manual S 81 50.3163 50 -0.41 45
IV.FEMA.HNE. 2016-01-19T08:58:01.02 0.6 undecidable manual S 63 49.5171 50 -0.24 46
IV.SACS.HHZ. 2016-01-19T08:58:00.68 0.6 undecidable manual S 281 49.3173 50 -0.51 44
IV.ATCC.EHE. 2016-01-19T08:58:00.94 1.0 undecidable manual S 13 48.0186 50 0.08 24
IV.ATTE.HHZ. 2016-01-19T08:58:00.96 0.6 undecidable manual S 346 49.7169 50 -0.34 45
IV.LNSS.HHZ. 2016-01-19T08:58:00.40 0.3 undecidable manual S 112 47.2194 50 -0.25 70
IV.ATVO.HHN. 2016-01-19T08:57:57.46 0.6 undecidable manual P 353 69.0753 50 0.11 46
IV.SMA1.EHZ. 2016-01-19T08:57:57.44 0.1 undecidable manual P 102 69.375 50 0.04 93
IV.MGAB.HHZ. 2016-01-19T08:57:57.39 0.6 undecidable manual S 298 35.9418 50 -0.22 48
IV.CSP1.EHE. 2016-01-19T08:57:57.16 0.1 undecidable manual P 57 67.5768 50 0.04 93
IV.ASSB.HHN. 2016-01-19T08:57:56.42 0.6 undecidable manual S 22 33.4443 103 -0.39 46
IV.FDMO.HHZ. 2016-01-19T08:57:55.31 0.3 undecidable manual P 57 56.2992 50 -0.06 71
IV.NRCA.HHZ. 2016-01-19T08:57:54.14 0.1 undecidable manual P 81 50.3163 50 -0.32 91
IV.SACS.HHZ. 2016-01-19T08:57:54.31 0.1 undecidable manual P 281 49.3173 50 0.01 97
IV.ATTE.HHZ. 2016-01-19T08:57:54.20 0.3 undecidable manual P 346 49.7169 50 -0.17 70
IV.LNSS.HHZ. 2016-01-19T08:57:53.69 0.1 positive manual P 112 47.2194 50 -0.3 92
IV.MGAB.HHZ. 2016-01-19T08:57:52.14 0.1 undecidable manual P 298 35.9418 50 -0.1 98
IV.CESX.HHZ. 2016-01-19T08:57:51.92 0.3 undecidable manual S 158 18.4704 113 0.04 76
IV.ASSB.HHN. 2016-01-19T08:57:51.72 0.3 undecidable manual P 22 33.4443 103 -0.05 74
IV.CESX.HHZ. 2016-01-19T08:57:49.17 0.1 undecidable manual P 158 18.4704 113 0.24 98
IV.MOMA.HHZ. 2016-01-19T08:57:48.40 0.3 undecidable manual S 52 6.6933 140 -0.1 77
IV.MOMA.HHZ. 2016-01-19T08:57:47.21 0.1 undecidable manual P 52 6.6933 140 0.23 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATTE.HHN. ML:1.3 0.00004775 1.58 AML other m 2016-01-19T08:58:02.16
IV.ATTE.HHE. ML:1.4 0.00005875 1.12 AML other m 2016-01-19T08:58:04.14
IV.CESX.HHE. ML:1.5 0.000266 1.18 AML other m 2016-01-19T08:57:54.57
IV.CESX.HHN. ML:1.5 0.00023999999999999998 0.48 AML other m 2016-01-19T08:57:54.60
IV.FDMO.HHN. ML:1.2 0.00003955 0.16 AML other m 2016-01-19T08:58:04.07
IV.FDMO.HHE. ML:1.2 0.0000376 1.1 AML other m 2016-01-19T08:58:03.62
IV.LNSS.HHN. ML:1.6 0.0001095 0.64 AML other m 2016-01-19T08:58:02.95
IV.LNSS.HHE. ML:1.5 0.00008929999999999999 0.36 AML other m 2016-01-19T08:58:00.88
IV.MGAB.HNE. ML:1.6 0.00017099999999999998 1.36 AML other m 2016-01-19T08:57:58.33
IV.MGAB.HHE. ML:1.6 0.00017099999999999998 0.16 AML other m 2016-01-19T08:57:59.83
IV.MGAB.HNN. ML:1.5 0.00013000000000000002 1.08 AML other m 2016-01-19T08:57:58.24
IV.MGAB.HHN. ML:1.6 0.0001375 1.08 AML other m 2016-01-19T08:57:58.78
IV.MOMA.HHN. ML:1.9 0.001375 0.26 AML other m 2016-01-19T08:57:48.56
IV.MOMA.HNE. ML:2.0 0.001695 0.3 AML other m 2016-01-19T08:57:49.06
IV.MOMA.HHE. ML:2.0 0.0017050000000000001 0.3 AML other m 2016-01-19T08:57:49.06
IV.MOMA.HNN. ML:1.8 0.00126 1.52 AML other m 2016-01-19T08:57:48.56
IV.NRCA.HHN. ML:1.5 0.0000767 0.92 AML other m 2016-01-19T08:58:03.40
IV.NRCA.HHE. ML:1.6 0.000097 1.36 AML other m 2016-01-19T08:58:01.65
IV.SMA1.EHN. ML:1.7 0.00008334999999999999 0.48 AML other m 2016-01-19T08:58:07.89
IV.SMA1.EHE. ML:1.8 0.0001105 0.34 AML other m 2016-01-19T08:58:08.93
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download